P0560 System Voltage Malfunction

P0560 indicates a general system voltage malfunction. The control module sees electrical-system voltage outside the expected operating behavior.

Code details

Generic OBD-II · P0

System: Speed / Idle
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not chase individual sensor codes first if system voltage is unstable; voltage faults can create many false secondary codes.

Symptoms of P0560

Unstable, high, or low idle, or stalling.
Erratic speedometer, cruise-control, or shift behaviour.
Check-engine light with a hesitation or surge.

Common causes of P0560

A dirty throttle body, idle-control valve, or throttle-position sensor.
A failing vehicle-speed or wheel-speed sensor, or its wiring.
Vacuum leaks or a related sensor forcing the idle/speed strategy.

Useful checks before replacing parts

Measure battery voltage, charging voltage, and voltage drop across main grounds and power feeds under load.
Inspect battery terminals, alternator output, fusible links, grounds, module power feeds, and recent jump-start or charging events.
Review companion low-voltage, high-voltage, communication, or sensor-reference codes that may share the same power issue.

Related OBD-II codes

These nearby speed / idle entries can help compare wording and pin down the fault area.