P20BB 2014 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 2014 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 2014 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 2014 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 2014 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 2014 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 2014 Chevrolet Silverado code?
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Frequently Asked Questions about P20BB 2014 Chevrolet Silverado Code
1. What does the OBDII code P20BB mean on a 2014 Chevrolet Silverado?
P20BB indicates a problem in the Reductant Heater 1 Control Circuit, specifically low voltage, which affects the diesel exhaust fluid (DEF) system.
2. What are the symptoms of code P20BB in a 2014 Chevrolet Silverado?
Common symptoms include the check engine light turning on, potential DEF system warnings, and possibly reduced engine power due to emissions-related issues.
3. What causes the P20BB code to appear on a 2014 Chevrolet Silverado?
The code can be triggered by a faulty reductant heater, damaged wiring, corroded connectors, or a failed control module.
4. How does the reductant heater affect the DEF system in a 2014 Chevrolet Silverado?
The reductant heater prevents DEF from freezing in cold weather. If it fails, the DEF system may not work correctly, leading to emissions problems.
5. Can you drive a 2014 Chevrolet Silverado with a P20BB code?
While the truck may still run, prolonged driving with this code can lead to emissions system malfunctions and potential engine performance issues.
6. How is the P20BB code diagnosed on a 2014 Chevrolet Silverado?
A mechanic will typically use a scan tool to confirm the code, inspect the wiring and connectors, and test the reductant heater's resistance and functionality.
7. What repairs can fix the P20BB code on a 2014 Chevrolet Silverado?
Repairs may include replacing the reductant heater, repairing or replacing damaged wiring, cleaning or replacing corroded connectors, or reprogramming the control module.
8. How much does it cost to fix a P20BB code on a 2014 Chevrolet Silverado?
The cost depends on the exact issue, but replacing a reductant heater typically ranges from $300 to $600, including parts and labor.
9. Can a faulty reductant heater cause other problems in a 2014 Chevrolet Silverado?
Yes, a malfunctioning heater can lead to DEF freezing in cold weather, reducing the effectiveness of the emissions system and potentially triggering other codes.
10. Is the P20BB code covered under warranty for a 2014 Chevrolet Silverado?
If your vehicle is still under emissions or powertrain warranty, the repair may be covered. Check with your dealer for warranty specifics.
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