P24CAParticulate Matter Sensor Temperature Circuit Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P24CA is reserved for a PM sensor temperature reading that fails only now and then instead of staying out of range. No manufacturer documents this code publicly. For comparison, Ford's 2023 diesel summary treats any temperature signal outside 0.3 to 3 V for 2 s as P24C6, and GM's 25OBDG04A table uses a counter of 24 failures within 96 samples for P24C9, so short glitches can stay below those limits. CARB requires circuit faults of PM sensors to be detected. Intermittent faults of this kind usually come from a cracked solder joint, a connector that loosens with heat or a lead that chafes on the exhaust. The warning lamp may come and go, and while the reading is doubtful the soot filter check is put on hold. P24C6, P24C8 and P24C9 are the steady faults.
- What you may notice
- Malfunction indicator lamp coming and going
- Particulate filter monitor does not complete
- Likely causes
- LikelyConnector loosening when hot
- PossibleLead chafing on the exhaust
- RareCracked joint inside the sensor lead
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.