P25BC

Regeneration Control Switch Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Disabling the DPF regeneration system
Increased fuel consumption
Possible problems with starting

Causes

Short circuit to positive in the control circuit
Regeneration switch malfunction
Wiring harness damage
Problems with the control relay
Engine ECU malfunction

How to Fix

Check the integrity of the wiring in the control circuit
Check the functionality of the regeneration switch
Check relays and fuses
Scan the ECU for other errors
If necessary, replace the switch or repair the wiring

Related codes

P25BD P25BB P2463