Battery Temperature Sensor Circuit Range/Performance
The P0514 code means the vehicle's onboard diagnostic system has detected: Battery Temperature Sensor Circuit Range/Performance. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $50 - $200 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Battery charging issues
- Battery overcharging or undercharging
- Reduced battery life
Probable Causes (Ranked by Likelihood)
- Faulty battery temperature sensor Very High
- Battery temperature sensor not properly attached to battery High
- Wiring issue between sensor and ECM/charging module Moderate
- Battery generating excessive heat due to internal failure Low
Step-by-Step Diagnostic Procedure
-
Read battery temperature sensor value with a scan tool and compare to actual battery temperature using a thermometer
-
Inspect the battery temperature sensor for proper mounting on the battery case or near the battery
-
Check sensor wiring for damage, corrosion, or loose connections
-
Test the battery itself for proper health; an internally failing battery may generate excessive heat
Frequently Asked Questions
What does the battery temperature sensor do?
The battery temperature sensor measures battery temperature and sends this data to the charging system. The ECM adjusts alternator output voltage based on battery temperature because batteries require different charging voltages at different temperatures.
Can P0514 damage my battery?
Yes. If the charging system does not receive accurate temperature data, it may overcharge the battery in hot weather or undercharge it in cold weather. Both conditions reduce battery life and can lead to premature failure.
Where is the battery temperature sensor located?
The sensor is typically attached to the battery case, inserted into the battery tray, or located in the battery cable. Some vehicles integrate it into the battery terminal clamp or the intelligent battery sensor (IBS) on the negative cable.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P0514 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
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