Cause
Failing battery
A battery that still starts the car and can no longer hold voltage under load. Modules notice long before the driver does, so a spread of unrelated warnings across the vehicle is a classic presentation — and testing it under load rather than reading its resting voltage is what distinguishes a tired battery from a healthy one.
Typically an easy fix. Often worth checking before paying anyone to look.
Codes this can cause (12)
Codes where this is a likely explanation first, rather than merely a possible one.
- P0560 System Voltage Likely for this code Moderate
- P0562 System Voltage Low Likely for this code Moderate
- P0881 Transmission Control Module Power Input Signal Range/Performance Likely for this code High
- P0882 Transmission Control Module Power Input Signal Low Likely for this code High
- P2502 Charging System Voltage Likely for this code High
- P2503 Charging System Voltage Low Likely for this code High
- P2506 Engine Control Module Power Input Signal Range/Performance Likely for this code High
- P0561 System Voltage Unstable Moderate
- P0601 Internal Control Module Memory Checksum Error High
- P0880 Transmission Control Module Power Input Signal High
- P2505 Engine Control Module Power Input Signal High
- P2507 Engine Control Module Power Input Signal Low High
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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