OBD-II code · Powertrain (generic)
P0474 Exhaust Pressure Sensor A Circuit Intermittent/Erratic
Exhaust pressure sensor A signal jumps or drops out intermittently. 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 P0474?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyIntermittent 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
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Exhaust Pressure Sensor
Related codes
- P0470Exhaust Pressure Sensor A Circuit
- P047EExhaust Pressure Sensor B Circuit Intermittent/Erratic
- P0471Exhaust Pressure Sensor A Circuit Range/Performance
- P0472Exhaust Pressure Sensor A Circuit Low
- P0473Exhaust Pressure Sensor A Circuit High
- P0475Exhaust Pressure Control Valve A
- P0476Exhaust Pressure Control Valve A Range/Performance
- P0477Exhaust Pressure Control Valve A Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.