OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P242C?
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 ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
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
- P0548Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1
- P2468Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 3
- P2472Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 3
- P2475Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 4
- P2481Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 5
- P2486Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 5
- P2EA3Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 6
- P2429Exhaust Gas Temperature Too High Bank 2
- P242AExhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3
- P242BExhaust Gas Temperature Sensor Circuit Range or Performance Bank 1 Sensor 3
- P242DExhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3
- P242EExhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 1 Sensor 3
- P242FParticulate Filter Restriction Ash Accumulation Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.