Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble reading the amount of a special fluid called 'reductant' in the tank. It's like when your video game console can't tell how much battery is left in your controller.
The P10AC code indicates an issue with the second reductant level sensor circuit, which monitors the amount of diesel exhaust fluid (DEF) in the tank.
The reductant level sensor is responsible for measuring the level of diesel exhaust fluid (DEF) in the tank. The sensor sends this information to the engine control module (ECM). If the ECM detects a range or performance issue with the sensor's circuit, it triggers the P10AC code.
• Check Engine Light (CEL) is on
• Warning message on the dashboard about DEF level
• Possible reduction in engine performance
• Faulty reductant level sensor
• Wiring issues or poor connections
• Defective ECM
Reductant: A substance, such as diesel exhaust fluid, used to reduce emissions.
ECM: Engine Control Module, the computer that manages engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the reductant level sensor for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the reductant level sensor if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Ford F-Series
• Chevrolet Silverado
• Ram 1500
• Regularly check and maintain DEF levels.
• Inspect wiring and connectors for damage.
• Keep the DEF tank clean and free of contaminants.
Sensor Issue
• Don't ignore the Check Engine Light.
• Have the vehicle inspected by a professional.
• Ensure regular maintenance of the DEF system.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has become more common with the increased use of DEF systems in diesel vehicles to meet emissions standards.
Moderate – Address the issue to avoid potential engine performance problems.
Ignoring emissions-related issues can lead to fines and increased emissions, which is harmful to the environment.
• Vehicle must be running.
• DEF tank should be at least partially filled.
The reductant level sensor is typically located in the diesel exhaust fluid (DEF) tank, often near the rear of the vehicle.
Q: What is a reductant level sensor?
A: It's a sensor that measures the level of diesel exhaust fluid (DEF) in the tank.
Q: Can I drive with a P10AC code?
A: It's not recommended as it may affect vehicle emissions and performance.
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