P2AB0
Particulate Matter Sensor Processor Performance
The ECM detects a processing performance fault inside the particulate matter (PM) sensor module. Internal self-tests fail or computed soot mass is implausible.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Internal PM sensor module faultCommon
- Module firmware corruption after voltage dropPossible
- Module software outdated, reflash may resolveLess likely
Parts involved
- Pm Sensor
- Pm Sensor Module
P2AB0 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.