Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 2 Intermittent (Generic)
The P4007 code means the vehicle's onboard diagnostic system has detected: Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 2 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 flickering or intermittent
- Inconsistent DPF regeneration
- Sporadic temperature spikes on scan tool
- Occasional reduced power warnings
Probable Causes (Ranked by Likelihood)
- Loose connector at EGT sensor 2 Very High
- Wiring chafing near DPF assembly High
- Sensor failing under thermal cycling Moderate
- Heat shield rubbing on wiring harness Low
Step-by-Step Diagnostic Procedure
-
Wiggle test sensor connector while watching live data
-
Inspect harness for heat damage or chafe points
-
Check connector locking tab for secure fit
-
Monitor sensor across multiple drive cycles
Frequently Asked Questions
Why does this code appear intermittently?
EGT sensor 2 is in a very harsh environment near the DPF. Heat cycling causes connectors to expand and contract, leading to intermittent contact issues over time.
Should I replace the sensor even if it tests okay?
If wiggle testing reproduces the fault, the connector or wiring is the issue, not the sensor. Repair the connection first and only replace the sensor if the code returns.
How long can I drive with P4007?
You can drive for a few days but schedule a repair soon. Inconsistent DPF temperature data will eventually cause regeneration failures.
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