Exhaust Gas Recirculation Temperature Sensor Circuit Intermittent (Generic)
The P4043 code means the vehicle's onboard diagnostic system has detected: Exhaust Gas Recirculation Temperature Sensor Circuit Intermittent (Generic). This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $80 - $300 (parts and labor)
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Common Symptoms
- Check Engine Light intermittent
- Sporadic EGR temperature fluctuations
- Occasional rough idle
- No significant drivability impact
Probable Causes (Ranked by Likelihood)
- Loose EGR temperature sensor connector Very High
- Wiring chafing near EGR components High
- Thermal cycling damage to connector Moderate
- Intermittent ground connection Low
Step-by-Step Diagnostic Procedure
-
Wiggle test connector while watching live data
-
Inspect wiring near EGR for heat damage
-
Check connector locking tab
-
Monitor sensor across drive cycles
Frequently Asked Questions
Is P4043 urgent?
No, P4043 is low severity. Schedule a repair at your convenience.
Can I pass emissions with P4043?
If the code is currently active, you will fail. If it has cleared and readiness monitors are complete, you may pass.
How do I find the intermittent fault?
Wiggle test the connector while watching EGR temperature data.
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