OBD-II code · Powertrain (generic)
P0473 Exhaust Pressure Sensor A Circuit High
Exhaust pressure sensor A above upper plausibility — open signal or short to B+. 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 P0473?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen signal line
- 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
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Exhaust Pressure Sensor
Related codes
- P0470Exhaust Pressure Sensor A Circuit
- P047DExhaust Pressure Sensor B Circuit High
- P0471Exhaust Pressure Sensor A Circuit Range/Performance
- P0472Exhaust Pressure Sensor A Circuit Low
- P0474Exhaust Pressure Sensor A Circuit Intermittent/Erratic
- P0475Exhaust Pressure Control Valve A
- P0476Exhaust Pressure Control Valve A Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.