Powertrain
generic / SAE
P24B5
Particulate Matter Sensor Heater Control Circuit Low
Same as P24B3 with the control line shorted to ground. The sensor heater warms the element to operating temperature (~600 °C); without it the lambda sensor stays inactive in closed loop and the ECM cannot trim mixture.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / B5
Possible causes
- Control line shorted to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 400–1200 €
- Estimated time: 1–3 h
- Component: particulate matter sensor heater
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012