Exhaust Gas Temperature Too High - Bank 2
The P2429 code means the vehicle's onboard diagnostic system has detected: Exhaust Gas Temperature Too High - Bank 2. This is a critical severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- hard
- Estimated cost
- $200 - $1500 (parts and labor)
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Common Symptoms
- Check Engine Light illuminated
- Engine in limp mode with reduced power
- Exhaust system extremely hot
- Burning or acrid smell
- Catalytic converter may glow red
Probable Causes (Ranked by Likelihood)
- Rich-running condition on bank 2 overheating catalyst Very High
- Misfire on bank 2 cylinder causing unburned fuel in exhaust High
- Restricted exhaust on bank 2 Moderate
- Failed EGT sensor reading falsely high Moderate
Step-by-Step Diagnostic Procedure
-
Check for misfire codes on bank 2 cylinders
-
Monitor bank 2 exhaust gas temperature with scan tool
-
Inspect bank 2 fuel injectors for leaking conditions
-
Check for exhaust restrictions on bank 2
-
Verify EGT sensor accuracy with an infrared thermometer
Frequently Asked Questions
Can I drive with code P2429?
No, stop driving immediately. Overheated exhaust components are a fire hazard and can cause severe damage to the catalytic converter and surrounding parts.
What causes P2429?
Usually a misfire or rich condition on bank 2 causing unburned fuel to ignite in the catalytic converter. Fix the root cause before replacing the catalyst.
Is P2429 expensive to fix?
Costs range from $200 to $1500. The root cause (misfire, leaking injector) must be fixed first. Catalytic converter replacement adds to the total cost.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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