Particulate Filter Regeneration Lamp Control Circuit
The DPF regeneration warning lamp circuit is faulty. The driver may not be alerted to a required highway run that supports passive regeneration.
Affected components
- Dpf regen lamp
- Instrument cluster
- Wiring harness
Common causes
- High likelihood: Burnt-out indicator bulb
- Medium likelihood: Open or shorted wire to the cluster
Possible symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Diagnostic notes
- The malfunction indicator lamp may illuminate
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.