P20BC 2016 GMC Sierra Code - Reductant Heater 1 Control Circuit High Voltage
Quick Answer
As reductant will freeze at temperatures below -11°C (12°F), there are 2 reductant heaters located in the reductant tank. Common causes include Faulty Reductant Heater, Reductant Heater harness is open or shorted, Reductant Heater circuit poor electrical connection. 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
- P20BC 2016 GMC Sierra indicates Reductant Heater 1 Control Circuit High Voltage.
- Common causes
- Common causes include Faulty Reductant Heater, Reductant Heater harness is open or shorted, Reductant Heater circuit poor electrical connection.
- 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.
Code P20BC 2016 GMC Sierra Description
The Diagnostic Trouble Code (DTC) will be set when the ECM indicates the reductant tank heater control circuit is shorted to a voltage for greater than 4 s.
What are the Possible Causes of the DTC P20BC 2016 GMC Sierra?
- Faulty Reductant Heater
- Reductant Heater harness is open or shorted
- Reductant Heater circuit poor electrical connection
- Faulty Reductant Pump and Sensor Assembly
- Faulty Reductant Control Module
How to Fix the DTC P20BC 2016 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P20BC 2016 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P20BC 2016 GMC Sierra code?
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Frequently Asked Questions about P20BC 2016 GMC Sierra Code
1. What are the common symptoms of OBDII code P20BC in a 2016 GMC Sierra?
The common symptoms of OBDII code P20BC in a 2016 GMC Sierra include the check engine light coming on, decreased fuel efficiency, and potential issues with the vehicle's exhaust system.
2. What does the OBDII code P20BC indicating "Reductant Heater 1 Control Circuit High Voltage" mean?
The OBDII code P20BC indicates that there is a high voltage condition detected in the control circuit of Reductant Heater 1 in the vehicle's selective catalytic reduction (SCR) system.
3. What are the possible causes of OBDII code P20BC in a 2016 GMC Sierra?
Possible causes of OBDII code P20BC in a 2016 GMC Sierra include a faulty reductant heater, damaged wiring or connectors in the heater circuit, a defective heater control module, or issues with the vehicle's powertrain control module (PCM).
4. How serious is OBDII code P20BC in a 2016 GMC Sierra?
OBDII code P20BC should be addressed promptly to ensure the proper functioning of the vehicle's SCR system and to prevent potential damage to the catalytic converter. Ignoring this code may lead to decreased engine performance and increased emissions.
5. What are some diagnostic steps to troubleshoot OBDII code P20BC in a 2016 GMC Sierra?
Diagnostic steps to troubleshoot OBDII code P20BC may include checking the reductant heater for proper operation, inspecting the wiring and connectors for damage, testing the heater control module, and scanning the vehicle's PCM for any related fault codes.
6. Can OBDII code P20BC be repaired without professional help?
While some DIY enthusiasts may attempt to address OBDII code P20BC on their own, it is recommended to seek professional assistance, especially when dealing with complex emissions control systems like the SCR system in a 2016 GMC Sierra.
7. How much does it typically cost to repair OBDII code P20BC in a 2016 GMC Sierra?
The cost of repairing OBDII code P20BC in a 2016 GMC Sierra can vary depending on the underlying cause of the issue. It is advisable to consult a mechanic or dealership to get an accurate estimate for the repair.
8. Can driving with OBDII code P20BC in a 2016 GMC Sierra cause further damage?
Continued driving with OBDII code P20BC in a 2016 GMC Sierra can potentially cause damage to the vehicle's catalytic converter and result in increased emissions. It is best to address the issue promptly to prevent further complications.
9. How long does it take to repair OBDII code P20BC in a 2016 GMC Sierra?
The repair time for OBDII code P20BC in a 2016 GMC Sierra can vary depending on the specific cause of the issue and the availability of parts. In some cases, the repair may be completed within a few hours, while more complex issues may require additional time.
10. Are there any preventive measures to avoid OBDII code P20BC in a 2016 GMC Sierra?
To prevent OBDII code P20BC in a 2016 GMC Sierra, it is essential to follow the manufacturer's recommended maintenance schedule, use high-quality diesel exhaust fluid (DEF), and address any warning lights or unusual symptoms promptly to avoid potential SCR system issues.
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