Particulate Filter Over Temperature (Bank 1)
A temperature sensor at the diesel particulate filter (DPF) on bank 1 has exceeded the safe limit — typically during a runaway regeneration. Continued operation can melt or crack the substrate.
Affected components
- Diesel particulate filter
- Dpf temperature sensor
- Regeneration strategy
Common causes
- High likelihood: Excessive soot load triggers runaway regeneration
- Medium likelihood: Post-injection over-fueling during regeneration
- Low likelihood: DPF temperature sensor reading drifts high
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
- This code can affect emissions
- Reduced-power or limp mode may occur
Related codes
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.