Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means that the car's computer thinks the sensor that checks the temperature of a special tank is reading too high. It's like a thermometer saying it's super hot when it shouldn't be.
The code indicates that the signal from the reductant tank temperature sensor B is higher than expected, suggesting a possible issue with the sensor or its circuit.
P2ADC is a diagnostic trouble code that indicates an issue with the reductant tank temperature sensor B circuit. This sensor monitors the temperature of the DEF (Diesel Exhaust Fluid) tank to ensure proper operation of the Selective Catalytic Reduction (SCR) system. A high circuit signal usually points to a malfunction in the sensor or a wiring issue.
• Check Engine Light illuminated
• Possible reduction in engine performance
• SCR system malfunction warning
• Faulty reductant tank temperature sensor B
• Wiring issues such as open or short circuits in the sensor circuit
• Poor electrical connections at the sensor or ECM
Reductant: A substance used to reduce emissions in diesel engines, often Diesel Exhaust Fluid (DEF).
SCR: Selective Catalytic Reduction, a system used to reduce nitrogen oxide emissions in diesel engines.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the sensor with a multimeter for proper resistance and voltage.
• Replace the reductant tank temperature sensor B if faulty.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-250
• Chevrolet Silverado 2500
• Ram 2500
• Regularly check and maintain DEF fluid levels.
• Inspect sensor wiring during routine maintenance.
• Ensure proper electrical connections in the SCR system.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Avoid using the vehicle until the issue is resolved to prevent further damage.
Check vehicle warranty for coverage on emissions-related components.
This code has been associated with SCR system issues in diesel vehicles since the introduction of stricter emissions standards.
Moderate – Address the issue soon to avoid potential damage to the SCR system.
Ignoring emissions-related codes can lead to non-compliance with environmental regulations.
• Vehicle at operating temperature
• DEF tank filled to recommended level
The reductant tank temperature sensor B is typically located near or on the DEF tank.
Q: Can I drive with a P2ADC code?
A: It's not recommended to drive for an extended period with this code, as it may affect emissions and engine performance.
Q: How do I clear a P2ADC code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, the code will return.
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