P20B0 RAM Code - Diesel Exhaust Fluid Reductant Pump Temperature Performance
Quick Answer
The P20B0 diagnostic trouble code (DTC) refers to an issue with the Diesel Exhaust Fluid (DEF) Reductant Pump Temperature Performance in a vehicle equipped with a Selective Catalytic Reduction (SCR) system. Common causes include Faulty DEF Reductant Pump: The DEF reductant pump itself may be malfunctioning, leading to temperature discrepancies, Wiring Issues: Wiring harness or connections related to the DEF reductant pump may be damaged or corroded, causing communication errors, Defective Temperature Sensor: The temperature sensor that monitors the DEF reductant pump temperature may be faulty or inaccurate. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P20B0 RAM indicates Diesel Exhaust Fluid Reductant Pump Temperature Performance.
- Common causes
- Common causes include Faulty DEF Reductant Pump: The DEF reductant pump itself may be malfunctioning, leading to temperature discrepancies, Wiring Issues: Wiring harness or connections related to the DEF reductant pump may be damaged or corroded, causing communication errors, Defective Temperature Sensor: The temperature sensor that monitors the DEF reductant pump temperature may be faulty or inaccurate.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P20B0 RAM Description
The P20B0 diagnostic trouble code (DTC) refers to an issue with the Diesel Exhaust Fluid (DEF) Reductant Pump Temperature Performance in a vehicle equipped with a Selective Catalytic Reduction (SCR) system. The SCR system is an emissions control technology designed to reduce nitrogen oxide (NOx) emissions in diesel engines. The DEF reductant pump is responsible for supplying the DEF fluid to the SCR catalyst, which helps convert harmful emissions into less harmful substances.
Common Causes of P20B0 RAM
- Faulty DEF Reductant Pump: The DEF reductant pump itself may be malfunctioning, leading to temperature discrepancies.
- Wiring Issues: Wiring harness or connections related to the DEF reductant pump may be damaged or corroded, causing communication errors.
- Defective Temperature Sensor: The temperature sensor that monitors the DEF reductant pump temperature may be faulty or inaccurate.
- ECM Software Issue: A software glitch or malfunction within the Engine Control Module can also trigger the P20B0 code.
Symptoms of P20B0 RAM
- Check Engine Light: The most common symptom associated with the P20B0 code is the illumination of the Check Engine Light on the vehicle's dashboard.
- Reduced Power: The vehicle may experience a decrease in power output and overall performance.
- Increased Emissions: There may be an increase in emissions output from the vehicle.
- Poor Fuel Efficiency: The vehicle may exhibit decreased fuel efficiency, resulting in more frequent refueling.
How to Fix P20B0 RAM
- Diagnose the Issue: Use a diagnostic scanner to retrieve the fault codes and pinpoint the exact cause of the problem.
- Inspect DEF Reductant Pump: Check the DEF reductant pump for any signs of damage or malfunction and replace if necessary.
- Check Wiring and Connections: Inspect the wiring harness and connections related to the DEF reductant pump for any faults and repair or replace as needed.
- Test Temperature Sensor: Verify the functionality of the temperature sensor and replace if found to be faulty.
- Update ECM Software: If a software issue is suspected, update or reflash the Engine Control Module with the latest software version.
Cost to Fix P20B0 RAM
The cost of repairing a P20B0 code related to the DEF Reductant Pump Temperature Performance can vary depending on the specific cause of the issue and the make and model of the vehicle. On average, the cost of parts and labor for this repair can range from $200 to $600. It's important to note that diagnostic time and labor rates at auto repair shops can fluctuate, so it's advisable to obtain quotes from multiple sources before proceeding with the repair.
Tech Notes for P20B0 RAM
- Reductant Metering Unit Temperature Sensor harness is open or shorted
- Reductant Metering Unit Temperature Sensor circuit poor electrical connection
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