Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means that a part in the car that checks how much electricity is going to the battery is saying there's too much. It's like when you fill a cup with water and it overflows.
The vehicle's control module has detected that the current flowing through Battery Sensor 2 is higher than expected, which could indicate an electrical issue.
The P14AC code is triggered when the Powertrain Control Module (PCM) detects a current reading from Battery Sensor 2 that exceeds the predefined threshold. This sensor monitors the electrical current to ensure the battery is charging correctly.
• Check Engine Light is on
• Battery warning light is on
• Electrical system malfunctions
• Faulty battery sensor
• Wiring issues
• Faulty alternator
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Scan the vehicle for codes and freeze frame data.
• Inspect the battery sensor and related wiring.
• Test the alternator output and battery condition.
• Replace the faulty battery sensor.
• Repair or replace damaged wiring.
• Replace the alternator if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Chevrolet Volt
• BMW i3
• Nissan Leaf
• Regularly check battery connections.
• Ensure alternator is functioning properly.
• Perform routine electrical system checks.
Sensor Issue
• Avoid running too many electrical accessories at once.
• Have the battery and alternator checked regularly.
Check with the vehicle manufacturer for warranty coverage on electrical components.
The P14AC code has been reported in hybrid and electric vehicles due to their complex electrical systems.
Moderate – Should be addressed soon to prevent battery damage.
Ignoring this code could lead to battery failure and potential vehicle shutdown.
• Engine running
• Electrical load applied
The battery sensor is typically located near the battery or integrated into the battery terminal.
Q: Can I drive with a P14AC code?
A: It's possible to drive for a short period, but it's advisable to get it checked soon to avoid battery issues.
Q: How do I reset the P14AC code?
A: After repairs, use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes.
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