Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 1 Intermittent (Generic)
The P4011 code means the vehicle's onboard diagnostic system has detected: Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 1 Intermittent (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 intermittent
- Sporadic bank 2 temperature spikes
- Inconsistent turbo boost on bank 2
- Occasional power reduction
Probable Causes (Ranked by Likelihood)
- Loose connector on bank 2 EGT sensor Very High
- Wiring damage from heat on bank 2 exhaust High
- Sensor connector not fully latched Moderate
- Intermittent PCM connection Low
Step-by-Step Diagnostic Procedure
-
Wiggle test connector while monitoring bank 2 EGT data
-
Inspect harness routing on bank 2 for heat damage
-
Check connector locking mechanism
-
Review freeze frame data for conditions when fault occurs
Frequently Asked Questions
Is bank 2 harder to access than bank 1?
On most V-configuration engines, bank 2 is against the firewall and can be more difficult to access. This may increase labor time for diagnosis and repair.
Why does the connector come loose?
Heat cycling causes thermal expansion and contraction of the connector. Over thousands of cycles, the locking tab can weaken and the connection becomes intermittent.
Should I replace both bank 1 and bank 2 sensors?
Only replace the sensor that is faulty. However, if one sensor has failed due to age, the other may follow soon.
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