Jeep Cherokee Push Button Start Won’t Work

A Jeep Cherokee push button start that won’t work is almost always caused by one of a few key issues: a weak key fob battery, a dead vehicle battery, a faulty brake light switch, or a problem with the steering wheel lock. Start with the simplest checks—like ensuring your foot is firmly on the brake and trying your spare key fob. If those don’t work, the issue likely requires a professional diagnostic scan tool to pinpoint the exact failure in the complex electronic system.

There you are, ready to go. You press the brake, hit that sleek, modern push-button start, and… nothing. No sound, no click, no turnover. Just a silent, unresponsive button and a sinking feeling in your stomach. Your trusty Jeep Cherokee has decided today is the day it won’t start. For owners of vehicles with the convenient push-button start system, this specific failure can feel particularly puzzling and frustrating. Unlike a traditional key ignition, there are no tumblers to clean or a cylinder to jiggle. The entire process is handled by a silent conversation between electronic components. When that conversation breaks down, you’re left stranded.

The good news is that while the system is complex, the most common reasons your Jeep Cherokee push button start won’t work are often diagnosable with a methodical approach. This guide will walk you through exactly how that system works, the most likely suspects causing your no-start condition, and what you can check yourself before calling for a tow. We’ll break it down into simple, actionable steps so you can understand what’s happening under the hood and in the electronics bay. Remember, safety first—if you’re ever unsure, especially when dealing with electrical components or the brake system, it’s always best to consult a professional.

Key Takeaways

• The brake pedal must be fully depressed: The system is designed so the engine will only start if it detects the brake is pressed. A faulty brake light switch is a very common culprit.
• Your key fob battery is the first thing to check: A weak key fob battery often prevents the vehicle’s antenna from recognizing the fob’s signal, even if the fob still unlocks the doors.
• Vehicle battery health is critical: The push-button start system requires a strong battery. A battery with enough voltage for lights/radio may still be too weak to activate the starter solenoid.
• The steering wheel lock can jam: If the steering wheel is locked against the wheel lock mechanism (common when parked against a curb), it can prevent the ignition button from turning the system on.
• It’s an electronic system, not a mechanical one: There is no traditional key cylinder to jiggle. The problem lies in the communication between the key fob, the start/stop button module, and the vehicle’s computer (BCM/PCM).
• Diagnostic trouble codes (DTCs) are your best clue: A professional scan tool is often necessary to read the specific fault code stored in the Body Control Module (BCM) to diagnose the exact failure point.
• Security system lockouts are possible: After multiple failed start attempts, the vehicle’s security system (SKIM) may lock you out, requiring a specific reset procedure with a dealer-level tool.

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How the Push-Button Start System Actually Works

Before we dive into what’s broken, it helps to understand what’s supposed to happen. The push-button start system in your Jeep Cherokee isn’t just a button; it’s the tip of an electronic iceberg. When you press the brake pedal and then the start button, here is the sequence of events that should occur:

The Key Fob’s Role

Your key fob contains a low-power radio frequency (RF) transmitter. Inside the vehicle, there are multiple antennas (typically in the dash, front doors, and trunk) that are constantly listening for the unique coded signal from your authorized fob. When you press the start button, the vehicle’s Body Control Module (BCM) first sends a “challenge” signal. Your key fob must respond with the correct encrypted answer to prove it’s present and legitimate. This is an anti-theft measure. If the fob isn’t detected or its battery is too weak to respond, the BCM will not allow the starter to engage.

The Brake Pedal Switch

Safety is paramount. The system is interlocked with the brake pedal. A switch mounted on the brake pedal assembly tells the BCM when the pedal is depressed. The BCM will not proceed with the start sequence unless this switch signals that your foot is on the brake. This prevents the vehicle from lurching forward unexpectedly if the transmission is in Drive or Neutral.

The Start Button Module & The BCM

The physical button you press is a simple momentary switch. It doesn’t have any ” brains.” Its only job is to tell the BCM, “The operator wants to start the vehicle.” The BCM is the central computer for this process. It checks: 1) Is a valid key fob present? 2) Is the brake pedal switch activated? 3) Is the transmission in Park or Neutral? If all conditions are “yes,” the BCM then sends a signal to the starter relay (or directly to the starter motor on some models) to crank the engine. Simultaneously, it activates the fuel pump and ignition system.

The Steering Wheel Lock

Many modern Jeeps have an electronic steering wheel lock. When you turn off the vehicle and remove your foot from the brake, this lock engages to prevent steering. The system must disengage this lock before starting. If the lock is mechanically jammed (e.g., the wheels are turned sharply against a curb), the lock motor may not be able to move it, preventing the start sequence from completing. You might hear a faint clicking or whirring from the steering column area when this fails.

So, when your Jeep Cherokee push button start won’t work, the failure is occurring at one of these communication points. Our job is to isolate which one.

Most Common Causes for a No-Start

Based on thousands of repair cases and technician reports, the vast majority of “push button start won’t work” issues fall into a handful of categories. Let’s go through them in order of likelihood and ease of check.

1. Key Fob Battery Failure

This is the #1 cause, and it’s frustratingly simple. The key fob battery (usually a CR2032) powers the RF transmitter. As it weakens, its signal range and strength diminish. You might still be able to lock/unlock the doors by pressing the fob button (which uses a stronger, shorter-range signal) or by using the hidden emergency key, but the passive signal the car needs to start may be too weak. Always start here.

• What you’ll notice: The push button does nothing. No lights on the button, no dash lights come on. The car is completely dead to the start command. The key fob may still work for locking doors.
• DIY Check: Replace the battery in your key fob with a fresh, high-quality CR2032. This is a $5-10 fix you can do in minutes by prying open the fob case (there’s usually a small slot for a flathead screwdriver). After replacing it, press the brake and start button again. Also, try your spare key fob if you have one. If the spare works, your primary fob’s battery is dead.
• Pro Tip: Some Jeeps allow you to start the vehicle in a “backup mode” if the key fob battery is dead. You typically hold the fob directly against the start button (or in a designated spot on the center console) while pressing the brake and start button. Consult your owner’s manual for the exact procedure for your model year.

2. Vehicle Battery Issues

The vehicle’s main 12V battery does more than just crank the engine. It powers all the vehicle’s computers, including the BCM, from the moment you press the brake pedal. If the battery voltage is too low (below ~12.4V), the system may not power up fully or may not be able to send the high current needed to the starter solenoid.

• What you’ll notice: You might get some dash lights, but they are dim. The start button might light up but do nothing, or you might hear a single faint click from the engine bay. The engine will not crank. This is often confused with a “bad starter.”
• Diagnostic Clue: If your Jeep Cherokee push button start won’t work but the radio, interior lights, and power windows still work, your battery might be borderline. Those accessories need less cranking amps. However, if absolutely nothing happens—no lights, no sounds—the battery is likely completely dead or a main fuse/connection is blown.
• DIY Check: Use a multimeter to check battery voltage at the terminals. Anything below 12.4 volts is suspect. A professional load test is more accurate. Check and clean the battery terminals for corrosion, which can create high resistance. Look for loose or damaged ground straps (a large black cable from the battery to the engine block/chassis). A poor ground connection can cause a host of no-start issues.
• Related Insight: This symptom of “won’t start but has power for accessories” is a classic across many makes. Our article on car won’t start but radio works dives deeper into the battery versus starter debate, which applies directly to your Jeep’s situation.

3. Faulty Brake Light Switch

This is arguably the most common mechanical failure point in the push-button start chain. The switch that tells the BCM “the brake is pressed” is an electrical switch mounted on the brake pedal arm. It wears out, gets misaligned, or its connector becomes corroded. If the BCM never gets the “brake applied” signal, it will ignore the start button press entirely.

• What you’ll notice: Pressing the start button does absolutely nothing. No cranking. However, your brake lights may also be out, which is a major safety issue. Check them! Sometimes the brake lights will still work if there’s a separate circuit, but often they share the same switch.
• DIY Diagnosis: Have a helper sit in the driver’s seat. You stand behind the vehicle. Have them press the brake pedal. Do the brake lights illuminate? If not, the switch is almost certainly faulty. You can sometimes locate the switch (look up at the brake pedal from the driver’s footwell) and manually press its plunger with your finger while someone else tries to start the car. If it starts, the switch is bad.
• Replacement: This is a relatively inexpensive and straightforward repair for a DIYer with basic tools. The switch is usually held by a clip or a couple of bolts. Just be sure to adjust it properly so the plunger is fully depressed when the pedal is at rest.

4. Steering Wheel Lock Mechanism Failure

As mentioned, the electronic steering lock must disengage for starting. If the steering wheel is turned sharply and the vehicle’s tires are against a curb or deep snow, the lock’s motor may not have enough torque to overcome the mechanical pressure. You might hear a rapid clicking or a whirring sound from the steering column when you press the start button, but the engine doesn’t crank.

• What you’ll notice: A faint, fast clicking or buzzing from the steering column area when you press the start button. The steering wheel is physically locked and will not turn.
• The Fix: This is often a simple matter of relieving the pressure on the lock. While pressing the brake pedal firmly, use your hands to vigorously turn the steering wheel back and forth, left and right. You’re trying to help the lock mechanism disengage. Often, you’ll feel a slight “pop” and the wheel will become free. Then try starting again. If this works, it’s a sign the lock motor is weak or the system is under excessive load.
• Persistent Issue: If this happens frequently, the lock motor may be failing and need replacement, or you may need to be more mindful of how you park (straightening the wheels before turning off the ignition can help).

5. Faulty Start/Stop Button Assembly

Less common, but possible. The button itself can fail internally. The contacts can wear out, or the internal LED/light can burn out (though that doesn’t always stop the function).

• What you’ll notice: The button may feel loose or not click properly. Sometimes, pressing it in different spots or wiggling it might cause it to work intermittently.
• Diagnosis: This is tricky to confirm without a scan tool to see if the BCM is receiving the signal from the button. A technician might use a multimeter to check for continuity when the button is pressed, but access can be difficult as it’s often integrated into the center console trim.
• Replacement: Replacing the button assembly typically requires removing surrounding trim pieces. It’s not overly complex but can be finicky. The new button may need to be programmed to the vehicle by a dealer.

6. Body Control Module (BCM) or PCM Issues

The BCM is the brain of this operation. If it has an internal fault, a software glitch, or has lost its configuration (sometimes after a battery disconnect), it may not send the start signal. Similarly, the Powertrain Control Module (PCM) must be ready to start the engine.

• What you’ll notice: No response from the start button, but other BCM functions (like power locks, lights, wipers) may also be acting strangely or not working. This is a “whole system” feeling.
• Diagnosis: This requires a professional scan tool that can communicate with the BCM. A technician will look for stored fault codes and may perform a “BCM wake-up” test or check for proper voltage and ground at the module. Sometimes, a simple BCM reset (disconnecting the battery for 10-15 minutes) can clear a glitch, but this often leads to the need to re-program certain features like radio presets and window settings.
• Security System (SKIM) Lockout: The Sentry Key Immobilizer Module (SKIM) is a separate module that works with the BCM. If it detects too many failed start attempts with the wrong key, it will permanently disable the starter for a period (usually 15-30 minutes) or until a valid key is used. The security light on the dash (a small car with a key icon) will typically flash rapidly during a lockout. The solution is to wait the specified time with a valid key fob inside the vehicle, then try again.

Systematic Diagnostic Steps You Can Take

Don’t just guess. Work through this logical flowchart to narrow down the problem. This method can save you time and money by helping you describe the exact symptoms to a mechanic.

Step 1: The Absolute Basics

Is the vehicle in Park or Neutral? The neutral safety switch will prevent starting if the transmission is in Drive, Reverse, or sometimes even a faulty switch in Park. Try gently wiggling the gear selector while firmly pressing the brake and the start button. Ensure the parking brake is fully released, as some systems interlock with it. Confirm the key fob is inside the vehicle. Some systems won’t start if the fob is detected outside, even if it’s close.

Step 2: Listen and Feel

When you press the brake and the start button, what happens?

• Absolutely nothing: No lights, no sounds. Points to key fob battery (most likely) or a complete vehicle battery failure/main fuse.
• A single loud click from the engine bay: Usually means the starter solenoid is engaging but the starter motor itself is faulty, or the battery is too weak to turn the motor over. This is a classic “weak battery or bad starter” scenario. Try jump-starting the vehicle.
• Rapid clicking (tick-tick-tick): From the engine bay or under the dash. This is the solenoid trying to engage but not getting enough power. Strong indicator of a weak battery or corroded/loose battery terminals.
• A whirring or buzzing sound from the steering column: Points directly to a jammed or failing steering wheel lock.
• The engine cranks normally but won’t start/fire: The starting system is working. The problem is in the fuel, spark, or compression. This is a different diagnostic path (fuel pump, ignition coils, crankshaft sensor). Our article on car cranks but won’t start covers these issues in detail.

Step 3: Check the Key Fob and Brake Lights

As described earlier, replace the key fob battery first. Then, check your brake lights. Have someone press the brake pedal while you look at the rear of the vehicle. If they don’t come on, the brake switch is the prime suspect. You can also check if the BCM is “seeing” the brake by seeing if your cruise control engages (if equipped). If cruise control doesn’t activate when you press the brake and set a speed, it’s another sign the brake switch signal isn’t getting to the computer.

Step 4: Try the Backup Start Procedure

Find the specific procedure for your Jeep Cherokee model year in the owner’s manual. It usually involves holding the key fob directly against the start button or placing it in a specific slot in the center console (often near the cupholders or gear shifter) while pressing the brake and start button. If this works, you have 100% confirmed a weak key fob battery or a failing key fob antenna in the vehicle.

Step 5: Battery Voltage and Connections

Get a multimeter. Set it to DC volts. Touch the red probe to the positive battery terminal and the black to the negative. A healthy, charged battery should read 12.6 volts or higher. If it’s 12.4 or lower, charge it. If it’s below 12.0, it may be sulfated and need replacement. While you’re there, inspect the terminals. Are they clean, tight, and free of white/green corrosion? Clean them with a battery terminal brush and a baking soda/water solution if needed. Check the large ground strap from the battery to the engine block and the chassis for tightness and corrosion.

Step 6: Seek Professional Help

If you’ve worked through steps 1-5 and the Jeep Cherokee push button start still won’t work, the problem is almost certainly inside the vehicle’s electronic network. At this point, you need a technician with a high-quality scan tool (like a dealer’s wiTECH or a advanced aftermarket tool) to communicate with the BCM and SKIM module. They will look for fault codes like “No Response from Key Fob,” “Brake Switch Circuit Failure,” or “Steering Lock Actuator Fault.” This diagnostic step is crucial before any expensive parts are thrown at the problem.

What You Can Safely DIY vs. When to Call a Pro

Empowering yourself to handle the simple checks is smart and saves money. But knowing your limits is crucial for safety and to avoid causing more damage.

Safe and Recommended DIY Tasks

• Replacing the key fob battery. Simple, cheap, and the most likely fix.
• Checking and cleaning battery terminals and cables. Just be sure to disconnect the negative terminal first and reconnect it last. Wear safety glasses.
• Checking brake light operation. A simple visual check with a helper.
• Attempting the steering wheel “wiggle” technique. This is purely mechanical effort and can’t hurt.
• Checking fuses. Locate the under-hood fuse box and the interior fuse panel (usually on the driver’s side dash panel). Check the fuses related to “START,” “IGNITION,” “BCM,” or “FOB.” A blown fuse can sometimes indicate a short circuit that needs further investigation, but replacing a clearly blown fuse with the same amperage rating is a valid first step.

Tasks for a Qualified Technician

• Diagnosing a faulty brake light switch: While replacement is DIY, confirming a *intermittent* switch fault or checking the wiring harness to it often requires a multimeter and circuit testing knowledge.
• Any work involving the steering column lock or airbag system. The steering column contains the airbag clock spring. Improper handling can accidentally deploy the airbag, which is dangerous and expensive.
• BCM or PCM reprogramming/replacement. These modules often require proprietary software and security access codes only dealers or specialized locksmiths have. Swapping a used BCM usually won’t work without programming it to your specific vehicle’s VIN and security system.
• Complex electrical diagnostics. Tracing wiring harness issues, checking antennae for the key fob system, or diagnosing a failing starter relay/solenoid that is controlled by the BCM.
• Security system lockout procedures. After a certain number of failed attempts, the system needs a specific reset procedure that may require a dealer scan tool.

Preventive Maintenance to Avoid Future No-Starts

An ounce of prevention is worth a pound of cure. Here’s how to keep your push-button start system healthy:

• Replace the key fob battery proactively. Don’t wait for it to die. Every 2-3 years is a good rule of thumb, especially if you use the fob’s buttons frequently. Keep a spare battery in your glove compartment.
• Maintain your vehicle battery. Have it tested at least once a year, especially before winter. Keep terminals clean and tight. If your battery is over 4-5 years old, consider proactive replacement.
• Park straight when possible. Try to leave your steering wheel straight. This reduces stress on the steering wheel lock mechanism when you park and start next time.
• Address minor electrical gremlins early. If you notice dimming headlights, occasional warning lights, or the radio resetting, have your charging system and battery checked. These can be early signs of a failing battery or alternator that will eventually leave you stranded.
• Use your spare key fob periodically. This ensures both fobs’ batteries are exercised and that the spare is functional when you need it.

Conclusion

A Jeep Cherokee push button start won’t work situation is more than just an inconvenience; it’s a puzzle rooted in modern automotive electronics. By understanding the core components—the key fob signal, the brake switch, the vehicle battery, and the steering lock—you can move from frustration to methodical diagnosis. Always start with the simplest, most common fixes: a new key fob battery and a check of your brake lights. Then, assess the battery health and try to relieve any pressure on the steering lock. If these steps don’t restore your Jeep’s life, it’s a clear sign that the fault lies deeper within the vehicle’s computer network, requiring the expertise of a professional with the right diagnostic tools. Remember, this system is designed with multiple safety interlocks for your protection. While it can be complex, its failures are usually predictable. Treat your Jeep’s electrical system with care, perform regular preventive maintenance, and you’ll enjoy the convenience of push-button starting for years to come.

Frequently Asked Questions

My Jeep Cherokee push button start does nothing, but the headlights and radio work. What is it?

This is a classic sign of a weak vehicle battery. The battery may have enough voltage for low-draw accessories but not enough cranking amps to engage the starter solenoid. First, check and clean the battery terminals. If that doesn’t help, have the battery load-tested. It may need charging or replacement.

The brake lights work, but my Jeep still won’t start with the push button. Why?

While a working brake light suggests the brake switch *might* be okay (as they often share the same switch), it’s not a guarantee. The switch has multiple circuits. The circuit that signals the Body Control Module (BCM) could be faulty while the brake light circuit is fine. A professional needs to test the switch’s output to the BCM with a scan tool or multimeter.

I hear a rapid clicking sound from the steering column when I press start. What is that?

That sound is almost always the electric steering wheel lock motor trying and failing to disengage. This usually happens when the steering wheel is turned sharply against the lock (like when parked against a curb). Firmly press the brake pedal and turn the steering wheel hard left and right to relieve the pressure. If it doesn’t free up, the lock motor may be failing and need replacement.

Can a bad key fob cause the push button start to not work even if it unlocks the doors?

Yes, absolutely. The signal used to unlock the doors is a stronger, active signal when you press the button. The signal used for push-button start is a passive, low-power signal that the car’s antennas constantly listen for. A weak key fob battery can’t power this passive signal effectively, even though it can still power the unlock button.

My Jeep’s security light is flashing rapidly after I tried to start it. Now it won’t start.

Your vehicle’s Sentry Key Immobilizer System (SKIM) has likely entered a lockout mode. This happens after too many failed start attempts with a key that isn’t properly programmed to the vehicle. The system needs a valid key fob inside the vehicle for a set period (usually 15-30 minutes) to reset. After waiting, try again with the correct key fob. If it persists, a dealer may need to use a scan tool to reset the security system.

Is there a way to start my Jeep if the key fob battery is completely dead?

Yes, most Jeep Cherokees have a backup method. You typically hold the dead key fob directly against the start button (or place it in a specific spot in the center console, often marked with a key symbol) while pressing the brake pedal and the start button. The physical proximity allows the vehicle’s antenna to read the fob’s chip directly. See your owner’s manual for the exact procedure for your model year.