Powertrain
generic / SAE
P20E4
Exhaust Gas Temperature Sensor 2/3 Correlation (Bank 1)
EGT sensors 1 and 3 on bank 1 disagree by more than the allowed tolerance — one is reading off, or there is a real temperature gradient that exceeds the calibrated map (e.g. from a leaking exhaust joint between the two locations).
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / E4
Possible causes
- One EGT sensor drifts high
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 60–600 €
- Estimated time: 0.5–2.5 h
- Component: exhaust gas temperature sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012