Error code

OBD2 P0560

OBD2P0560
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

System Voltage.

Severity

moderateCan drive, but monitor the vehicle closely for worsening symptoms.

Summary

P0560 indicates a malfunction in the system voltage, which is detected by the PCM when it senses an abnormal voltage value from the battery, charging, or starting systems.

Symptoms

  • Illuminated CHECK ENGINE light
  • Illuminated charging/battery warning light
  • Hard, difficult, or no-start conditions
  • Frequent or unpredictable engine stalling
  • Increased fuel consumption over extended periods
  • Harsh, erratic, or unpredictable shifting on automatic transmissions
  • Erratic instrument readings

Common Causes

  • Defective battery
  • Defective alternator
  • Poor connections or corrosion at battery terminals
  • Large electrical drains from short circuits in wiring or components
  • Inhibited current flow due to poor ground connections
  • Aftermarket accessories installed incorrectly

Diagnosis

  1. Extract and record all codes and freeze frame data.
  2. Check battery condition, connections, and drain on electrical systems.
  3. Load-test the battery and check starter motor current draw.
  4. Inspect alternator output with engine running using a multimeter.
  5. Verify proper ground connections and repair any issues found.

Fixes

  • Replace defective battery or alternator as needed.

FAQ

What should I do if the code persists after checking all components?

If P0560 returns despite thorough checks, there may be an intermittent issue. Allow it to worsen slightly for better diagnosis.

Can a faulty PCM cause this code?

While rare, a malfunctioning PCM can set P0560 if it controls the alternator output incorrectly.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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