P20BB 2017 Chevrolet Silverado Code - Reductant Heater 1 Control Circuit Low 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
- P20BB 2017 Chevrolet Silverado indicates Reductant Heater 1 Control Circuit Low 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 P20BB 2017 Chevrolet Silverado Description
The Diagnostic Trouble Code (DTC) will be set when the ECM indicates the reductant tank heater control circuit is shorted to ground or overloaded for greater than 4 s.
What are the Possible Causes of the DTC P20BB 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 P20BB 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 P20BB 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 P20BB 2017 Chevrolet Silverado code?
Need more information on how to fix the P20BB 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals
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Frequently Asked Questions about P20BB 2017 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code P20BB in a 2017 Chevrolet Silverado?
The common symptoms of code P20BB include the check engine light being illuminated, reduced engine performance, and potential issues with the vehicle's emissions system.
2. What does the OBDII code P20BB on a 2017 Chevrolet Silverado indicate?
Code P20BB indicates a problem with the Reductant Heater 1 Control Circuit Low Voltage in the emissions system of the vehicle.
3. What are the possible causes of OBDII code P20BB in a 2017 Chevrolet Silverado?
Possible causes of code P20BB can include a faulty reductant heater, issues with the reductant heater circuit, wiring problems, or a malfunctioning powertrain control module (PCM).
4. How serious is OBDII code P20BB in a 2017 Chevrolet Silverado?
While the vehicle may still be operable with this code present, it is important to address the issue promptly to ensure proper vehicle performance and compliance with emissions regulations.
5. How can I diagnose OBDII code P20BB in my 2017 Chevrolet Silverado?
Diagnosing code P20BB typically involves using a diagnostic scanner to retrieve the code, inspecting the reductant heater system components, checking the wiring for damage, and testing the reductant heater circuit for proper voltage.
6. Can I continue driving my 2017 Chevrolet Silverado with OBDII code P20BB?
It is generally not recommended to continue driving with a persistent OBDII code like P20BB, as it can lead to reduced fuel efficiency, emissions compliance issues, and potential damage to other components.
7. How can I repair OBDII code P20BB in my 2017 Chevrolet Silverado?
Repairing code P20BB may involve replacing the faulty reductant heater, repairing any damaged wiring, resetting the code with a diagnostic scanner, and ensuring that the system is functioning properly.
8. Is it possible to clear OBDII code P20BB in a 2017 Chevrolet Silverado without fixing the issue?
While it is possible to clear the code temporarily, it is important to address the underlying issue causing code P20BB to prevent it from reoccurring and ensure proper vehicle operation.
9. How much does it cost to fix OBDII code P20BB in a 2017 Chevrolet Silverado?
The cost of repairing code P20BB can vary depending on the specific cause of the issue, the labor rates of the repair shop, and the cost of any necessary parts or components.
10. Can a DIY enthusiast fix OBDII code P20BB in a 2017 Chevrolet Silverado?
Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to diagnose and repair code P20BB by following repair guides, but professional assistance is recommended for complex issues.
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