P20BD GMC Code - Reductant Heater 2 Control Circuit
Quick Answer
The P20BD diagnostic trouble code (DTC) for GMC vehicles refers to an issue with the reductant heater 2 control circuit. Common causes include Electrical Faults: Issues with the wiring, connectors, or components within the reductant heater 2 control circuit can trigger this code, Heater Failure: A malfunction or failure within the reductant heater 2 itself can cause the control circuit to register a fault, PCM Malfunction: A malfunctioning Powertrain Control Module (PCM) can also lead to the triggering of this code. 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
- P20BD GMC indicates Reductant Heater 2 Control Circuit.
- Common causes
- Common causes include Electrical Faults: Issues with the wiring, connectors, or components within the reductant heater 2 control circuit can trigger this code, Heater Failure: A malfunction or failure within the reductant heater 2 itself can cause the control circuit to register a fault, PCM Malfunction: A malfunctioning Powertrain Control Module (PCM) can also lead to the triggering of this code.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P20BD GMC Description
The P20BD diagnostic trouble code (DTC) for GMC vehicles refers to an issue with the reductant heater 2 control circuit. In vehicles equipped with a Selective Catalytic Reduction (SCR) system, reductant heaters are responsible for warming up the Diesel Exhaust Fluid (DEF) before it is injected into the exhaust stream. The reductant heater 2 control circuit is specifically in charge of regulating the temperature of the reductant heater 2, ensuring it operates within the optimal range for efficient emission control.
Common Causes of P20BD GMC
- Electrical Faults: Issues with the wiring, connectors, or components within the reductant heater 2 control circuit can trigger this code.
- Heater Failure: A malfunction or failure within the reductant heater 2 itself can cause the control circuit to register a fault.
- PCM Malfunction: A malfunctioning Powertrain Control Module (PCM) can also lead to the triggering of this code.
- Corrosion: Corrosion or damage to the electrical connections related to the reductant heater 2 control circuit can cause issues.
- Environmental Factors: Extreme temperatures or environmental conditions can also impact the proper functioning of the reductant heater 2 control circuit.
Symptoms of P20BD GMC
- Check Engine Light: The most common symptom associated with the P20BD code is the illumination of the Check Engine Light on the vehicle's dashboard.
- Reduced Fuel Efficiency: A malfunctioning reductant heater 2 control circuit can lead to decreased fuel efficiency as the SCR system may not operate optimally.
- Poor Performance: The vehicle may experience a decrease in performance, including reduced power and acceleration.
- Increased Emissions: Failure to address this issue can result in higher emissions output, potentially causing the vehicle to fail emissions tests.
- DEF Freezing: In cold weather conditions, a malfunctioning reductant heater 2 control circuit may lead to the DEF freezing, causing further issues with the emissions control system.
How to Fix P20BD GMC
- Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble codes and perform a comprehensive inspection of the reductant heater 2 control circuit.
- Check Wiring and Connections: Inspect the wiring, connectors, and components related to the reductant heater 2 control circuit for any signs of damage, corrosion, or loose connections.
- Test the Heater: Check the functionality of the reductant heater 2 to determine if it is operating correctly. Replace the heater if necessary.
- Replace Faulty Components: Replace any faulty sensors, relays, or fuses that are contributing to the issue with the reductant heater 2 control circuit.
- Clear Codes and Test Drive: After completing the repairs, clear the fault codes from the PCM's memory and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P20BD GMC
The cost of repairing a P20BD DTC related to the reductant heater 2 control circuit can vary depending on the extent of the issue and the specific components that need replacement. On average, the parts required for this repair can range from $100 to $300, while the labor costs can add another $100 to $200 to the total bill. Overall, the typical repair cost for addressing this code can amount to approximately $200 to $500. It's important to note that these estimates are general figures and actual costs may vary based on factors such as the vehicle's make and model, the location of the repair shop, and any additional services required. Checking with local auto repair shops for accurate pricing is recommended.
Need more information about the P20BD GMC code?
Need more information on how to fix the P20BD GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P20BD GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- P20BD 2014 GMC Sierra — Reductant Heater 2 Control Circuit
- P20BD 2015 GMC Sierra — Reductant Heater 2 Control Circuit
- P20BD 2016 GMC Sierra — Reductant Heater 2 Control Circuit
- P20BD 2017 GMC Sierra — Reductant Heater 2 Control Circuit
- P20BD 2018 GMC Sierra — Reductant Heater 2 Control Circuit
Frequently Asked Questions about P20BD GMC Code
No Frequently Asked Questions about P20BD GMC Code found.
Discuss the causes and fixes for P20BD GMC OBDII Code
Code P20BD GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.