Cause
Faulty battery temperature sensor
The sensor letting the charging system adjust voltage for battery temperature — a cold battery needs more, a hot one needs less. A wrong reading gives persistent overcharging or undercharging with no other fault, which shortens battery life and is usually blamed on the battery.
Typically specialist work. Needs equipment or training most home workshops do not have.
Some of these codes mean you should stop driving
1 of the 99 codes this can cause indicate a fault where continuing to drive risks damage or is unsafe. Which one you have matters more than the cause does — read the code's own page before deciding.
Codes this can cause (99)
Codes where this is a likely explanation first, rather than merely a possible one.
- P0514 Battery Temperature Sensor Circuit Range/Performance Likely for this code Low
- P0515 Battery Temperature Sensor Circuit Likely for this code Low
- P0516 Battery Temperature Sensor Circuit Low Likely for this code Low
- P0517 Battery Temperature Sensor Circuit High Likely for this code Low
- P0A7B Battery Energy Control Module Requested Malfunction Indicator Lamp Illumination Likely for this code Moderate
- P0A9C Hybrid/EV Battery Temperature Sensor A Circuit Range/Performance Likely for this code Moderate
- P0AAD Hybrid/EV Battery Pack Air Temperature Sensor A Circuit Range/Performance Likely for this code Moderate
- P0AB2 Hybrid/EV Battery Pack Air Temperature Sensor B Circuit Range/Performance Likely for this code Moderate
- P0AC6 Hybrid/EV Battery Temperature Sensor B Circuit Range/Performance Likely for this code Moderate
- P0ACB Hybrid/EV Battery Temperature Sensor C Circuit Range/Performance Likely for this code Moderate
- P0AE9 Hybrid/EV Battery Temperature Sensor D Circuit Range/Performance Likely for this code Moderate
- P0BC2 Hybrid/EV Battery Temperature Sensor E Circuit Likely for this code High
- P0BC3 Hybrid/EV Battery Temperature Sensor E Circuit Range/Performance Likely for this code High
- P0BC4 Hybrid/EV Battery Temperature Sensor E Circuit Low Likely for this code High
- P0BC5 Hybrid/EV Battery Temperature Sensor E Circuit High Likely for this code High
- P0BC6 Hybrid/EV Battery Temperature Sensor E Circuit Intermittent/Erratic Likely for this code High
- P0C33 Hybrid/EV Battery Temperature Sensor F Circuit Likely for this code High
- P0C34 Hybrid/EV Battery Temperature Sensor F Circuit Range/Performance Likely for this code High
- P0C35 Hybrid/EV Battery Temperature Sensor F Circuit Low Likely for this code High
- P0C36 Hybrid/EV Battery Temperature Sensor F Circuit High Likely for this code High
- P0C37 Hybrid/EV Battery Temperature Sensor F Circuit Intermittent/Erratic Likely for this code High
- P0C6E Hybrid/EV Battery Temperature Sensor A/B Correlation Likely for this code High
- P0C6F Hybrid/EV Battery Temperature Sensor B/C Correlation Likely for this code High
- P0C70 Hybrid/EV Battery Temperature Sensor C/D Correlation Likely for this code High
- P0C71 Hybrid/EV Battery Temperature Sensor D/E Correlation Likely for this code 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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- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
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