P20B9 2017 Chevrolet Silverado Code - Reductant Heater 1 Control Circuit
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
- P20B9 2017 Chevrolet Silverado indicates Reductant Heater 1 Control Circuit.
- 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 P20B9 2017 Chevrolet Silverado Description
The Diagnostic Trouble Code (DTC) will be set when the ECM indicates the reductant tank heater control circuit is open for greater than 4 s.
What are the Possible Causes of the DTC P20B9 2017 Chevrolet Silverado?
- 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 P20B9 2017 Chevrolet Silverado?
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 P20B9 2017 Chevrolet Silverado 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 P20B9 2017 Chevrolet Silverado code?
Need more information on how to fix the P20B9 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals
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Frequently Asked Questions about P20B9 2017 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code P20B9 in a 2017 Chevrolet Silverado?
- Common symptoms include the check engine light coming on, reduced engine performance, and potential issues with the vehicle's emissions system.
2. What does the OBDII code P20B9 "Reductant Heater 1 Control Circuit" mean in a 2017 Chevrolet Silverado?
- This code indicates a problem with the control circuit for the reductant heater 1 in the emissions system of the vehicle.
3. What are some possible causes of OBDII code P20B9 in a 2017 Chevrolet Silverado?
- Possible causes include a faulty reductant heater, damaged wiring or connectors in the control circuit, or a malfunctioning powertrain control module (PCM).
4. How serious is OBDII code P20B9 in a 2017 Chevrolet Silverado?
- While the vehicle may still be driveable with this code, it is important to address it promptly to prevent potential damage to the emissions system and ensure compliance with emissions regulations.
5. Can I continue driving my 2017 Chevrolet Silverado with OBDII code P20B9?
- It is generally not recommended to continue driving the vehicle with this code, as it may lead to increased emissions and potential engine performance issues.
6. How can I diagnose and repair OBDII code P20B9 in my 2017 Chevrolet Silverado?
- Diagnosis involves checking the reductant heater system, inspecting wiring and connectors, and testing the PCM. Repairs may include replacing the reductant heater, repairing wiring, or reprogramming the PCM.
7. Will resetting the check engine light resolve OBDII code P20B9 in a 2017 Chevrolet Silverado?
- Resetting the check engine light may temporarily clear the code, but it will likely reappear if the underlying issue is not addressed. It is important to diagnose and repair the root cause of the problem.
8. How much does it typically cost to fix OBDII code P20B9 in a 2017 Chevrolet Silverado?
- The cost of repairs can vary depending on the specific cause of the code and the labor rates in your area. It is recommended to consult with a professional mechanic for an accurate estimate.
9. Can I fix OBDII code P20B9 in my 2017 Chevrolet Silverado myself?
- While some DIY enthusiasts may attempt to diagnose and repair this code themselves, it is recommended to seek assistance from a qualified mechanic or technician to ensure the problem is properly addressed.
10. How often does OBDII code P20B9 occur in 2017 Chevrolet Silverado vehicles?
- The occurrence of this specific code can vary among vehicles, but it is not uncommon in vehicles with emissions system issues. Regular maintenance and prompt repairs can help prevent this code from appearing.
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