P05FA

Stop-Start Status Signal Circuit Low

Severity

✅ Low

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$22–133 (est.)

Symptoms

The start-stop system is permanently disabled
The start-stop system indicator is on
Check Engine Light Is On
In some cases, associated CAN bus errors

Causes

Status signal line short to ground
Open power supply circuit for status signal
Malfunction of the start-stop system control unit
Faulty sensor supplying data to the system
Damage to connector or wiring

How to Fix

Read codes, check all errors in the start-stop and CAN systems
Check the voltage on the status signal line with the ignition on
Check the signal wire for short circuit to ground (resistance of wire to ground)
Inspect the connectors of the start-stop system control unit
Check the correct operation of the connected units (battery, automatic transmission)
Diagnose the start-stop system control unit

Related codes

P05F9 P05FB P0A7F