P20D7 Code - Exhaust Aftertreatment Fuel Supply Control Circuit/Open
Quick Answer
The P20D7 diagnostic trouble code (DTC) refers to an issue with the Exhaust Aftertreatment Fuel Supply Control Circuit being open. Common causes include Faulty Fuel Supply Control Module: A malfunction in the fuel supply control module can trigger this code, Wiring Issues: Damaged or corroded wiring in the fuel supply control circuit can cause an open circuit fault, Sensor Malfunction: A faulty sensor that monitors fuel supply to the aftertreatment system can lead to this issue. 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
- P20D7 indicates Exhaust Aftertreatment Fuel Supply Control Circuit/Open.
- Common causes
- Common causes include Faulty Fuel Supply Control Module: A malfunction in the fuel supply control module can trigger this code, Wiring Issues: Damaged or corroded wiring in the fuel supply control circuit can cause an open circuit fault, Sensor Malfunction: A faulty sensor that monitors fuel supply to the aftertreatment system can lead to this issue.
- 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 P20D7 Description
The P20D7 diagnostic trouble code (DTC) refers to an issue with the Exhaust Aftertreatment Fuel Supply Control Circuit being open. This code is typically found in diesel vehicles equipped with an aftertreatment system, such as a diesel particulate filter (DPF) or a selective catalytic reduction (SCR) system. The aftertreatment system is responsible for reducing harmful emissions from the vehicle's exhaust gases.
Common Causes of P20D7
- Faulty Fuel Supply Control Module: A malfunction in the fuel supply control module can trigger this code.
- Wiring Issues: Damaged or corroded wiring in the fuel supply control circuit can cause an open circuit fault.
- Sensor Malfunction: A faulty sensor that monitors fuel supply to the aftertreatment system can lead to this issue.
- Software Glitch: An issue with the vehicle's ECM software can also result in the P20D7 code.
Symptoms of P20D7
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
- Reduced Fuel Efficiency: Drivers may notice a decrease in fuel efficiency as a result of the malfunctioning fuel supply control circuit.
- Increased Emissions: The vehicle may produce higher levels of emissions due to the improper operation of the aftertreatment system.
- Loss of Power: In some cases, the vehicle may experience a loss of power or reduced engine performance.
How to Fix P20D7
- Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and pinpoint the exact cause of the problem.
- Inspect Wiring: Check the wiring in the fuel supply control circuit for any damage or corrosion and repair or replace as needed.
- Test Sensors: Verify the operation of sensors related to the fuel supply control circuit and replace any faulty sensors.
- Replace Fuel Supply Control Module: If the module is found to be faulty, it will need to be replaced with a new one.
- Clear Codes: Once the repair is completed, clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P20D7
The cost of repairing a P20D7 code can vary depending on the specific cause of the issue and the vehicle's make and model. In general, the parts and labor required 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 vary, with hourly rates typically falling between $80 and $150. Additional costs may apply if any components need to be replaced. For a more accurate estimate, it's recommended to consult with a local auto repair shop.
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