P20B5 Dodge Code - Diesel Exhaust Fluid Reductant Pump Heater Control Circuit Open
Quick Answer
The P20B5 diagnostic trouble code for Dodge vehicles specifically refers to a problem with the Diesel Exhaust Fluid (DEF) reductant pump heater control circuit being open. Common causes include Faulty DEF reductant pump heater, Damaged wiring or connectors in the heater control circuit, Corrosion or contamination in the electrical connections. 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
- P20B5 Dodge indicates Diesel Exhaust Fluid Reductant Pump Heater Control Circuit Open.
- Common causes
- Common causes include Faulty DEF reductant pump heater, Damaged wiring or connectors in the heater control circuit, Corrosion or contamination in the electrical connections.
- 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 P20B5 Dodge Description
The P20B5 diagnostic trouble code for Dodge vehicles specifically refers to a problem with the Diesel Exhaust Fluid (DEF) reductant pump heater control circuit being open. This means that there is an issue with the electrical circuit that controls the heater for the DEF reductant pump, which is responsible for injecting DEF into the exhaust stream to reduce harmful emissions. The DEF system plays a crucial role in meeting emission standards and ensuring the vehicle runs efficiently.
Common Causes of P20B5 Dodge
- Faulty DEF reductant pump heater
- Damaged wiring or connectors in the heater control circuit
- Corrosion or contamination in the electrical connections
- Defective heater control module
- Software or programming issues
Symptoms of P20B5 Dodge
- Illuminated check engine light on the dashboard
- Reduced engine power or performance
- Increased fuel consumption
- Failed emissions test
- DEF fluid freezing in cold weather
How to Fix P20B5 Dodge
- Begin by conducting a visual inspection of the DEF reductant pump heater and its wiring to check for any visible damage or corrosion.
- Use a multimeter to test the continuity of the heater circuit and check for any open circuits or shorts.
- Inspect the wiring harness and connectors for any signs of damage or corrosion, repairing or replacing as necessary.
- Test the heater control module to ensure it is functioning correctly, replacing it if found to be faulty.
- Clear the diagnostic trouble codes from the vehicle's computer and test the vehicle to ensure the issue has been resolved.
Cost to Fix P20B5 Dodge
The cost of repairing a P20B5 code can vary depending on the specific cause of the issue and the labor rates in your area. In general, you can expect to pay anywhere from $200 to $500 for parts and labor to address this problem. Keep in mind that diagnostic time and labor rates can vary, so it's a good idea to get a quote from a trusted auto repair shop in your area.
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