OBD-II code · Powertrain (generic, extended)
P24B1 Particulate Matter Sensor Circuit High
Same as P24AE 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 P24B1?
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
- Best left to a mechanic
- Typical labour
- 1–3 h
- Emissions test
- Likely to fail
- Parts involved
- Particulate Matter Sensor
Related codes
- P24AEParticulate Matter Sensor Circuit
- P24AFParticulate Matter Sensor Circuit Range or Performance
- P24B0Particulate Matter Sensor Circuit Low
- P24B2Particulate Matter Sensor Circuit Intermittent
- P24B3Particulate Matter Sensor Heater Control Circuit Open
- P24B4Particulate Matter Sensor Heater Control Circuit Range or Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.