What Does P2429 Mean?
Exhaust gas temperature on Bank 2 exceeds the maximum threshold programmed into the PCM. High exhaust temperatures can damage catalytic converters and other exhaust components.
Safety Warning
Should not be driven extensively. Excessive exhaust heat can damage the catalytic converter, cause turbocharger failure, and create fire risk.
Common Causes
30%
Engine running excessively lean on Bank 2
25%
Failed or restricted EGR system affecting Bank 2
20%
Exhaust restriction in Bank 2 catalytic converter
15%
Engine overheating affecting exhaust temperatures
10%
Faulty exhaust temperature sensor providing false readings
Diagnostic Steps
1
Step 1: Monitor real-time exhaust temperature data for Bank 2 with scan tool
2
Step 2: Check fuel trim data for Bank 2 to identify lean conditions
3
Step 3: Test EGR system function and verify proper cooling on Bank 2
4
Step 4: Measure exhaust backpressure on Bank 2 to check for restrictions
5
Step 5: Verify coolant temperature and cooling system operation
Estimated Repair Cost
$200 - $2,000
Parts + labor, varies by vehicle and location
Exhaust gas temperature on Bank 2 exceeds the maximum threshold programmed into the PCM. High exhaust temperatures can damage catalytic converters and other exhaust components.
The most common cause of P2429 (Exhaust Gas Temperature Too High Bank 2) is: Engine running excessively lean on Bank 2
Typical repair costs for P2429 range from $200 to $2,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Should not be driven extensively. Excessive exhaust heat can damage the catalytic converter, cause turbocharger failure, and create fire risk.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2429 to identify the root cause.
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Quick Info
Category
Powertrain
System
Exhaust System / Emissions
Difficulty
Type
Generic (SAE)
Recommended Tools
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