Powertrain
generic / SAE
P24B4
Particulate Matter Sensor Heater Control Circuit Range or Performance
Same as P24B3 with the heater control loop in plausible range yet not matching the heater model. 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 / B4
Possible causes
- Heater element aged high
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