Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is saying that the power going to a sensor is too high, like when a toy gets too many batteries and doesn't work right.
The Engine Control Module (ECM) has detected that the voltage level in the sensor power supply 'A' circuit is higher than the specified range.
The P16F5 code indicates that the ECM has identified an abnormally high voltage condition in the sensor power supply 'A' circuit. This could be due to a short circuit, a faulty sensor, or an issue with the power supply itself.
• Check Engine Light is on
• Poor engine performance
• Unusual engine behavior
• Faulty sensor
• Short circuit in the wiring
• Defective ECM
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the voltage levels in the sensor power supply circuit.
• Repair or replace damaged wiring.
• Replace the faulty sensor.
• Replace or reprogram the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wire repair kit
$100 - $500
Moderate
• Chevrolet Malibu
• Buick Regal
• GMC Terrain
• Regularly inspect wiring for wear.
• Ensure sensors are properly installed.
• Keep the ECM software updated.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have a professional diagnose the issue.
• Avoid driving the vehicle until it's repaired.
Check with your vehicle manufacturer for specific warranty coverage related to the ECM and sensors.
This code is less common and typically associated with electrical issues in newer vehicle models.
Moderate – It should be addressed soon, but the vehicle may still be drivable.
Driving with a malfunctioning sensor can lead to unsafe vehicle operation. Always address Check Engine Light issues promptly.
• Engine running
• Vehicle stationary
The sensor power supply 'A' circuit is typically located within the engine bay, near the ECM or the specific sensor it powers.
Q: Can I drive with a P16F5 code?
A: It's not recommended to drive with this code as it may affect engine performance.
Q: How do I clear a P16F5 code?
A: The code can be cleared with an OBD-II scanner after the issue is fixed.
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