P24B2Particulate Matter Sensor 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
- P24B2 stands for a PM sensor electrode reading that cuts out or jumps for short moments rather than staying permanently low or high. Such dropouts usually come from a loose pin, a chafed harness near the hot exhaust or moisture in the connector. FCA documents the code for Jeep Compass diesels: bulletin 18-008-23 lists P24B2 for 2019 vehicles with the 2.0L engine (sales code EBS), and 18-026-23 for 2022 models, both fixed by reprogramming the PCM. Neither bulletin publishes a threshold. CARB requires the system to catch circuit continuity faults of the PM sensor. P24B0 and P24B1 are the steady low and high faults. Drivers mostly see only the warning lamp, but the filter monitor pauses while the signal is unreliable.
- What you may notice
- Malfunction indicator lamp on, sometimes going out again
- Particulate filter monitor does not complete
- Likely causes
- LikelyLoose or corroded pin in the sensor connector
- PossibleHarness chafing on hot exhaust parts
- PossibleEngine control software that needs reprogramming
- RareIntermittent internal sensor fault
- 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 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.