Fault-Code Library · DPF sensing
P2453: DPF differential-pressure sensor range / performance
The pressure signal used to calculate DPF restriction is implausible or outside range.
Common symptoms
- •DPF warning
- •Regeneration problems
- •Reduced power
- •Incorrect soot estimate
Likely causes
- •Blocked, split, or reversed pressure hoses
- •Failed pressure sensor
- •Wiring fault
- •Severely restricted filter
First checks
- •Check key-on engine-off pressure value
- •Inspect both pressure hoses
- •Compare pressure at idle and raised speed
Important
A bad pressure signal can mislead regeneration strategy and soot-load calculations.
A fault code identifies a detected condition, not a failed part. Confirm manufacturer-specific subcodes and live data.