OBD-II code · Powertrain (generic, extended)
P2477 Exhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 2 Sensor 4
Same as P242E on bank 2 sensor 4. 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 P2477?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyIntermittent contact at connector
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
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 B2s4
Related codes
- P242EExhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 1 Sensor 3
- P246AExhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 2 Sensor 3
- P2484Exhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 1 Sensor 5
- P2489Exhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 2 Sensor 5
- P2474Exhaust Gas Temperature Sensor Circuit Range or Performance Bank 2 Sensor 4
- P2475Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 4
- P2476Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 4
- P2478Exhaust Gas Temperature Out of Range Bank 1 Sensor 1
- P2479Exhaust Gas Temperature Out of Range Bank 1 Sensor 2
- P247AExhaust Gas Temperature Out of Range Bank 1 Sensor 3
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.