Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 1 High (Generic)
The P4010 code means the vehicle's onboard diagnostic system has detected: Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 1 High (Generic). This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $100 - $400 (parts and labor)
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Common Symptoms
- Check Engine Light on
- False high reading bank 2 sensor 1
- Unnecessary power reduction
- Turbo protection mode on bank 2
Probable Causes (Ranked by Likelihood)
- Short to voltage in bank 2 EGT circuit Very High
- Faulty sensor reading high High
- Chafed wiring contacting power source Moderate
- Reference voltage circuit issue Low
Step-by-Step Diagnostic Procedure
-
Check sensor signal voltage against specification
-
Inspect wiring for shorts to other circuits
-
Test sensor resistance at known temperature
-
Verify 5V reference circuit at connector
Frequently Asked Questions
Will false high readings damage my turbo?
No, but the PCM may unnecessarily limit boost pressure on bank 2 to protect the turbo from perceived overheating, reducing performance.
Can P4010 cause limp mode?
On some vehicles, yes. If the PCM believes exhaust temperatures are dangerously high, it will limit engine power significantly.
How do I find a short to voltage?
Disconnect the sensor and check the signal wire for voltage with key on. If voltage is present with the sensor disconnected, trace the wire for contact with power sources.
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