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.
Affected components
- Particulate matter sensor heater
Common causes
- High likelihood: Heater element aged
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.