P20C0 2016 Chevrolet Silverado Code - Reductant Heater 2 Control Circuit High Voltage
Quick Answer
The P20C0 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado refers to the Reductant Heater 2 Control Circuit High Voltage. Common causes include Faulty reductant heater 2, Wiring or connector issues in the control circuit, Corrosion or damage to the heater element. 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
- P20C0 2016 Chevrolet Silverado indicates Reductant Heater 2 Control Circuit High Voltage.
- Common causes
- Common causes include Faulty reductant heater 2, Wiring or connector issues in the control circuit, Corrosion or damage to the heater element.
- 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 P20C0 2016 Chevrolet Silverado Description
The P20C0 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado refers to the Reductant Heater 2 Control Circuit High Voltage. This code indicates that there is a problem with the control circuit for the reductant heater 2 in the vehicle's selective catalytic reduction (SCR) system. The SCR system is responsible for reducing harmful emissions by injecting a urea-based solution (diesel exhaust fluid or DEF) into the exhaust stream, which reacts with nitrogen oxides (NOx) to convert them into nitrogen and water vapor.
Common Causes of P20C0 2016 Chevrolet Silverado
- Faulty reductant heater 2
- Wiring or connector issues in the control circuit
- Corrosion or damage to the heater element
- Software or calibration issues in the SCR system
- Electrical system malfunctions
Symptoms of P20C0 2016 Chevrolet Silverado
- Check engine light illuminated
- Reduced fuel efficiency
- Failed emissions test
- Decreased engine performance
- Unusual exhaust odor
How to Fix P20C0 2016 Chevrolet Silverado
- Diagnose the specific cause of the high voltage in the reductant heater 2 control circuit using a scan tool and multimeter.
- Inspect the wiring and connectors for any damage, corrosion, or loose connections. Repair or replace as necessary.
- Test the reductant heater 2 for proper function and resistance. Replace if faulty.
- Check and update the software or calibration of the SCR system if needed.
- Clear the DTC and reset the check engine light after completing the repair process.
Cost to Fix P20C0 2016 Chevrolet Silverado
The typical repair costs for addressing a P20C0 code on a 2016 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary depending on factors such as location, vehicle make and model, and engine type. It is recommended to inquire about local rates for a more accurate estimate. Keep in mind that rates may be higher at dealerships or metropolitan areas, while independent shops often offer more competitive pricing.
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Frequently Asked Questions about P20C0 2016 Chevrolet Silverado Code
What does the OBDII code P20C0 mean on a 2016 Chevrolet Silverado?
The P20C0 code indicates a problem with the Reductant Heater 2 Control Circuit, specifically that it is experiencing high voltage.
What are the symptoms of the P20C0 code in a 2016 Chevrolet Silverado?
Common symptoms include the check engine light turning on, poor engine performance, or issues with the diesel exhaust fluid (DEF) system in colder weather.
What causes the P20C0 code to appear?
The code is typically caused by issues like a faulty reductant heater, damaged wiring or connectors in the heater circuit, or a malfunctioning powertrain control module (PCM).
Can I drive my 2016 Chevrolet Silverado with the P20C0 code?
While the truck might still be drivable, ignoring the code can lead to further DEF system problems and may eventually limit engine performance.
How do I diagnose the P20C0 code on my Silverado?
Diagnosis involves checking the DEF system’s heater circuit for damaged wiring, testing the reductant heater's resistance, and verifying the voltage levels in the control circuit.
How can I fix the P20C0 code?
Repairs may include replacing the reductant heater, repairing damaged wiring or connectors, or updating or reprogramming the PCM if necessary.
Is the P20C0 code related to cold weather issues?
Yes, the reductant heater is responsible for preventing DEF from freezing in cold temperatures, so the code may cause problems in colder climates.
How much does it cost to repair the P20C0 code?
Repair costs can vary but may range from $200 to $800 depending on whether you need to replace the reductant heater or repair the wiring.
Can a bad reductant heater cause other issues in my Silverado?
Yes, a failing reductant heater can lead to DEF freezing in cold weather, which may cause further emissions system problems or reduced engine performance.
Do I need to reprogram the PCM to fix the P20C0 code?
PCM reprogramming is not always required, but if the issue persists after hardware repairs, an update or reprogramming may be necessary.
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