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 has detected a problem with the sensor that checks the temperature of a special fluid tank. It's saying that the sensor is giving a very low reading.
The reductant tank temperature sensor monitors the temperature of the DEF (Diesel Exhaust Fluid) tank. A low circuit signal indicates that the sensor is reporting a temperature lower than expected.
The P2ADB code is triggered when the engine control module (ECM) detects a voltage signal from the reductant tank temperature sensor B that is below the specified range. This sensor is part of the SCR (Selective Catalytic Reduction) system, which reduces emissions in diesel engines. A low signal could indicate a short circuit, a faulty sensor, or wiring issues.
• Check Engine Light is on
• Possible reduction in engine performance
• Emission test failure
• Faulty reductant tank temperature sensor
• Short circuit in the sensor wiring
• Corroded or damaged connectors
DEF: Diesel Exhaust Fluid, a fluid used in diesel engines to reduce emissions.
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's resistance and compare it to specifications.
• Replace the reductant tank temperature sensor.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive 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 inspect and maintain the DEF system.
• Ensure connectors are clean and free of corrosion.
• Use quality DEF fluid to prevent contamination.
Sensor Issue
• Address the issue promptly to avoid potential engine performance problems.
• Consult a professional mechanic if unsure about the repair process.
Check with the vehicle manufacturer for specific warranty coverage on emission-related components.
This code has become more prevalent with the increased use of SCR systems in diesel engines to meet emission standards.
Moderate – While the vehicle may still operate, emissions and performance could be affected.
Driving with an unresolved emission system issue may lead to legal penalties and increased pollution.
• Engine at operating temperature
• DEF tank filled with quality fluid
The reductant tank temperature sensor is typically located on or near the DEF tank, often mounted directly on the tank itself.
Q: Can I drive with a P2ADB code?
A: It's possible to drive with this code, but it's recommended to fix it soon to avoid emission issues.
Q: What happens if I ignore the P2ADB code?
A: Ignoring this code can lead to increased emissions and potential engine performance issues.
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