P05FB

Stop-Start Status Signal Circuit High

Severity

✅ Low

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$22–167 (est.)

Symptoms

Start-stop system blocked
The start-stop system malfunction indicator is on
Check Engine Light Is On
Possible associated CAN network errors

Causes

Short circuit of status signal wire to power supply (+12V or +5V)
Malfunction of the control unit generating the status signal
Damage to the signal wire insulation (touching the positive bus)
Incorrect connection after repair
Engine ECU malfunction

How to Fix

Read codes, check all errors in the start-stop system
Measure the voltage on the status signal line with the ignition on and off
If the voltage is high when the ignition is turned off, there is a short circuit in the wiring
Disable control units one by one to localize the source of the high signal
Check the wiring for contact with the positive tires
Replace or reprogram the faulty unit

Related codes

P05F9 P05FA P0A7F