Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of the car that heats up a special fluid used to clean the exhaust. It's like when a heater in your house doesn't work right.
The vehicle's computer has detected a problem with the performance of the control circuit for the second heater in the reductant system.
The reductant heater is part of the Selective Catalytic Reduction (SCR) system, which uses Diesel Exhaust Fluid (DEF) to reduce emissions. The heater ensures the DEF doesn't freeze and flows properly. Code P20BE indicates that the control circuit for the second heater isn't performing as expected, which could be due to electrical issues or a faulty heater.
• Check Engine Light is on
• Poor engine performance
• Increased emissions
• Faulty reductant heater B
• Wiring issues in the heater circuit
• Faulty control module
Reductant: A substance used to reduce emissions in diesel engines.
SCR: Selective Catalytic Reduction, a technology used to reduce vehicle emissions.
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connectors of the reductant heater B.
• Test the reductant heater B for proper operation.
• Replace the faulty reductant heater B.
• Repair or replace damaged wiring or connectors.
• Replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Wire repair tools
$200 - $600
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly inspect the SCR system components.
• Ensure proper DEF fluid levels.
• Perform routine maintenance checks.
Sensor Issue
• Avoid driving long distances until repaired.
• Consult a professional mechanic for diagnosis.
• Do not ignore the Check Engine Light.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has become more common with the increased use of SCR systems in diesel vehicles to meet stricter emission standards.
Moderate – Address the issue soon to avoid potential damage to the SCR system.
Driving with a malfunctioning emissions system may violate emissions regulations.
• Vehicle at operating temperature
• Engine running
The reductant heater is typically located near the DEF tank or along the DEF line.
Q: Can I drive with this code?
A: It's not recommended to drive for long periods with this code, as it may lead to increased emissions and potential damage to the SCR system.
Q: Is this a serious issue?
A: While not immediately critical, it should be addressed soon to ensure proper vehicle emissions and performance.
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