Powertrain
generic / SAE
P242C
Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 3
Same as P242A with the signal voltage below the plausible range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / 2C
Possible causes
- Signal shorted to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 120–400 €
- Estimated time: 0.6–1.8 h
- Component: egt sensor b1s3
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012