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 temperature of the special liquid in a tank that helps clean the car's exhaust. It's like when a thermometer gives a wrong temperature reading.
The P2ADA code is triggered when the Engine Control Module (ECM) detects an issue with the performance or range of the reductant tank temperature sensor B circuit.
The reductant tank temperature sensor B is responsible for monitoring the temperature of the Diesel Exhaust Fluid (DEF) in the tank. This sensor helps ensure that the DEF is at the correct temperature for optimal performance. If the sensor readings are outside the expected range or performance parameters, the ECM will set the P2ADA code.
• Check Engine Light is on
• Possible reduction in engine performance
• Increased emissions
• Faulty reductant tank temperature sensor B
• Wiring issues or poor connections in the sensor circuit
• Malfunctioning ECM
DEF: Diesel Exhaust Fluid, a liquid used to reduce air pollution from diesel engines.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the reductant tank temperature sensor B for proper operation.
• Replace the reductant tank temperature sensor B if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly inspect and maintain the DEF system.
• Ensure proper DEF levels and quality.
• Perform routine vehicle diagnostics.
Sensor Issue
• Avoid ignoring the Check Engine Light.
• Schedule a diagnostic check with a professional.
• Do not attempt repairs without proper tools and knowledge.
Check vehicle warranty for coverage on emissions-related components.
This code has become more common with the increased use of DEF systems in diesel engines to meet emission standards.
Moderate – Addressing this code is important to maintain vehicle emissions and performance.
Ignoring emissions-related codes can lead to failing emissions tests and potential fines.
• Engine at operating temperature
• Vehicle parked on level ground
The reductant tank temperature sensor B is typically located near or on the DEF tank, often on the underside of the vehicle.
Q: Can I drive with a P2ADA code?
A: While you can drive with this code, it's best to address it soon to avoid increased emissions and potential performance issues.
Q: How does the reductant tank temperature sensor affect my vehicle?
A: It helps ensure the DEF is at the right temperature for effective emissions reduction. If it's not working, emissions may increase.
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