P2506

ECM/PCM Power Input Signal Range/Performance

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Rough engine operation
Power dips
Spontaneous engine stop
Difficulty starting
Flashing warning lights on the dashboard

Causes

Faulty generator
Poor contact in the ECU power circuit
Corroded battery terminals
Worn alternator belt
Malfunction of the control unit itself

How to Fix

Check battery and generator voltage
Inspect and clean battery terminals
Check the integrity of the wiring to the ECU
Diagnose generator operation
If necessary, replace the control unit

Related codes

P0562 P0563 P062F