Honda Accord, CR-V, Civic & Odyssey Push Start Button Problems: 2016-2025

Is Your Honda's Push Start Button Failing?

If you own a 2018-2022 Honda Accord, 2017-2022 Honda CR-V, 2016-2021 Honda Civic, or a 2018-2025 Honda Odyssey, you might experience an issue where you press the engine start button and nothing happens, or it takes multiple presses to get the engine to turn over. This intermittent starting problem is a common symptom of a failing Engine Start/Stop switch, part number 35881-TBA-A01. Fortunately, this is a relatively simple and inexpensive part to replace.

Diagnosing the Problem: Switch, Battery, or Something Else?

Before replacing the switch, it's crucial to rule out other common issues that can mimic the same symptoms. A misdiagnosis can lead to unnecessary expense and frustration.

1. Weak Key Fob Battery: This is the most frequent cause of starting issues. If the fob's battery is low, the car may not detect its signal.

   Pro Tip: Hold the key fob directly against the face of the Engine Start/Stop button and try to start the car. If the vehicle starts, the ignition switch is working correctly, and you simply need to replace the CR2032 coin battery in your key fob.

   🎬 Watch: This must-know tip for starting your Honda with a dead fob.
2. Weak 12V Vehicle Battery: A low main car battery can cause a host of electronic problems, including a failure to crank. If your interior lights are dim or you hear a rapid clicking sound when trying to start, your vehicle's battery is the likely culprit.
3. Faulty Brake Pedal Switch: The vehicle will not attempt to start unless the system detects that the brake pedal is pressed. Check if your brake lights are working. If they don't illuminate when you press the pedal, the brake pedal switch may need replacement.
4. Gear Selector Position: Ensure the vehicle is firmly in Park (P). The engine will not crank in any other gear. Sometimes an object can obstruct the shifter, preventing it from fully engaging in Park.

Symptoms of a Failing Ignition Switch

If you've ruled out the issues above, the ignition switch itself is the likely cause. Failure is usually due to wear and tear on the internal electrical contacts. Symptoms often start intermittently and become more frequent over time.

• Multiple Presses to Start: You have to press the button several times before the engine will crank. This is the most common sign of a worn-out switch.
• Delayed Start: You press the button, and there is a noticeable delay before the starter engages.
• "Keyless Start System Problem" Message: This warning may appear on your instrument cluster, often accompanied by Diagnostic Trouble Code (DTC) B12C5 (Engine Start/Stop Switch Failure).
• Sticky or Physically Damaged Button: In some cases, the button may feel sticky, especially in cold weather, or fail to return smoothly after being pressed. This can be caused by dirt, spills, or internal wear.

Known Issues, TSBs, and Recalls

While there are no active recalls for the push-button ignition switch on the 2016-2025 Honda Accord, CR-V, Civic, or Odyssey, Honda has acknowledged similar issues on other models. A warranty extension was issued for the 2016-2018 Honda HR-V and 2016-2017 Pilot for this exact problem, extending coverage to 9 years or 125,000 miles. This indicates a known weakness in the switch design from this era. If you own one of the affected vehicles in this guide and are experiencing these symptoms, it is worth contacting a dealer to inquire about any potential goodwill assistance, even if your specific model is not part of an official extension.

Buying a Used Ignition Switch

Because this ignition switch does not require programming, a used OEM part is an excellent, cost-effective option. It is a simple plug-and-play component.

• Why Used OEM is a Good Choice: Aftermarket switches can be of inconsistent quality. A genuine used Honda switch from a low-mileage vehicle offers the same reliability as a new OEM part at a fraction of the cost.
• What to Inspect: When buying used, physically inspect the button. Ensure it has a smooth, crisp action when pressed and returns cleanly. Avoid any switches that feel sticky or look like they have had liquid spilled on them.
• Compatibility: Verify the part number is 35881-TBA-A01. While other part numbers may exist for different trim packages or regions, this is the dominant part number for the vehicles covered in this guide.
• Red Flags: Be wary of parts pulled from vehicles with flood or fire damage. Check the electrical connector pins to ensure they are clean, straight, and free of corrosion.

Replacement Overview & Cost

Replacing the ignition switch is a straightforward job that is feasible for a DIY mechanic with basic tools. The difficulty is low, and it typically takes less than 30 minutes.

1. Disconnect the negative terminal of the 12V battery.
2. Use a plastic trim removal tool to carefully pry off the panel surrounding the ignition switch. On most models, this panel is held in by clips and pops straight off.
3. Press the small release tab on the electrical connector to unplug it from the back of the switch.
4. Squeeze the locking tabs on the sides of the switch housing to release it from the panel and push it out.
5. Installation is the reverse of removal. The new switch will click into place, and the connector only fits one way.

Cost Comparison

Frequently Asked Questions (FAQ)