P2505

ECM/PCM Power Input Signal

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$6–167 (est.)

Symptoms

Check Engine Light Is On
Unstable engine operation
Problems starting the engine
Reduced engine power
Errors in other vehicle systems

Causes

Damaged or corroded ECM/PCM power wires
ECM/PCM power relay malfunction
Problems with the power fuse
Unstable voltage from generator
Malfunction of the control unit itself

How to Fix

Check the continuity of the ECM/PCM power supply fuses.
Inspect and check ECM/PCM power wires for damage
Check ECM/PCM power relay
Diagnose generator operation
If necessary, replace the control unit

Related codes

P2506 P2507 P2508