P20BB 2016 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 2016 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 2016 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 2016 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 2016 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 2016 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 2016 Chevrolet Silverado code?
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Frequently Asked Questions about P20BB 2016 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code P20BB in a 2016 Chevrolet Silverado?
The common symptoms include the check engine light turning on, decreased fuel efficiency, and potential issues with the vehicle's emissions system.
2. What does the OBDII code P20BB for Reductant Heater 1 Control Circuit Low Voltage indicate in a 2016 Chevrolet Silverado?
This code indicates that there is low voltage detected in the control circuit of the reductant heater 1 in the vehicle's emissions system.
3. What are the possible causes of OBDII code P20BB in a 2016 Chevrolet Silverado?
Possible causes include a faulty reductant heater, damaged wiring or connectors in the control circuit, a blown fuse related to the reductant heater, or issues with the powertrain control module.
4. How can I diagnose the OBDII code P20BB in my 2016 Chevrolet Silverado?
Diagnosing this code typically involves checking the wiring and connectors related to the reductant heater, testing the reductant heater itself for proper function, and inspecting the fuse and powertrain control module for any faults.
5. Can I continue driving my 2016 Chevrolet Silverado with OBDII code P20BB active?
It is not recommended to continue driving with this code active, as it can lead to decreased fuel efficiency and potential issues with the vehicle's emissions system. It's best to address the underlying problem as soon as possible.
6. How can I repair OBDII code P20BB in my 2016 Chevrolet Silverado?
Repairing this code may involve replacing the reductant heater if it is faulty, repairing or replacing damaged wiring or connectors, ensuring the fuse related to the heater is intact, and addressing any issues with the powertrain control module.
7. Is it possible to clear the OBDII code P20BB in a 2016 Chevrolet Silverado without fixing the underlying issue?
Clearing the code without addressing the underlying issue may temporarily turn off the check engine light, but the problem will likely resurface. It's important to fix the root cause of the code to prevent further issues.
8. How much does it typically cost to repair OBDII code P20BB in a 2016 Chevrolet Silverado?
The cost of repairing this code can vary depending on the specific cause of the issue, but it may involve parts and labor costs associated with replacing the reductant heater, repairing wiring, or addressing other related components.
9. Can a DIY enthusiast fix OBDII code P20BB in a 2016 Chevrolet Silverado?
Depending on their skill level and access to tools, a DIY enthusiast may be able to address some of the common causes of this code, such as checking and repairing wiring or replacing the reductant heater. However, more complex issues may require professional assistance.
10. How often does OBDII code P20BB occur in a 2016 Chevrolet Silverado?
The occurrence of this code can vary depending on the vehicle's usage and maintenance history. It is not one of the most common codes but can still be encountered in certain circumstances, especially if there are issues with the emissions system.
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