The DPF differential pressure sensor circuit is faulty. Without it the ECU cannot judge how loaded the filter is, so it assumes the worst.
P2452 — also written P2452, P 2452, 2452 — is the OBD-II code for diesel particulate filter pressure sensor circuit. Same code, same fix: this page covers every spelling of it.
P2452 is a emissions fault code, typically costing £60–£400 to put right in a UK garage.
What causes P2452?
- Failed pressure sensor
- Blocked, split or soot-clogged pressure pipes
- Corroded connector
- Wiring damage from exhaust heat
How P2452 is fixed
- Remove and clear the pressure pipes — blocked pipes are extremely common and cost almost nothing to clean
- Replace the sensor
- Repair the connector
P2452 repair cost in the UK
Most P2452 repairs land between £60–£400 including parts and labour. The spread is wide because the cheap fix (a sensor, a hose, a leak) and the expensive fix (a major component) throw the same code — which is why a proper diagnosis before parts are bought saves the most money.
Can you drive with P2452?
Yes, but the DPF may not regenerate properly until it is fixed.
Urgency: medium.