P22F1 — Particulate Matter Sensor Heater Performance
The particulate matter (PM) sensor heater on diesel after-DPF systems does not reach or hold the calibrated operating temperature within the expected time. Without proper heating the PM sensor cannot be regenerated and read correctly.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Pm sensor
- Pm heater circuit
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- PM sensor aging
- Increased heater resistance
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
- Reduced-power or limp mode may occur
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
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.