OBD-II code · Powertrain (generic, extended)
P242D Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3
Same as P242A with the signal voltage above 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.
Is it safe to drive with P242D?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal shorted to supply
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–1.8 h
- Emissions test
- Likely to fail
- Parts involved
- Egt Sensor B1s3
Related codes
- P0549Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1
- P2469Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 3
- P2473Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3
- P2476Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 4
- P2482Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 5
- P2487Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 5
- P2EA2Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 6
- P242AExhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3
- P242BExhaust Gas Temperature Sensor Circuit Range or Performance Bank 1 Sensor 3
- P242CExhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 3
- P242EExhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 1 Sensor 3
- P242FParticulate Filter Restriction Ash Accumulation Bank 1
- P2430AIR System Air Flow or Pressure Sensor Circuit Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.