P20BB Ford Code - Reductant Heater 'A' Control Circuit Low
Quick Answer
The P20BB Ford code indicates a problem with the reductant heater 'A' control circuit being lower than the expected voltage range. Common causes include Faulty reductant heater relay, Short circuit in the reductant heater wiring, Defective reductant heater 'A'. 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 Ford indicates Reductant Heater 'A' Control Circuit Low.
- Common causes
- Common causes include Faulty reductant heater relay, Short circuit in the reductant heater wiring, Defective reductant heater 'A'.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P20BB Ford Description
The P20BB Ford code indicates a problem with the reductant heater 'A' control circuit being lower than the expected voltage range. In modern diesel vehicles, a reductant heater is used to heat the diesel exhaust fluid (DEF) to improve its efficiency in reducing harmful emissions. The reductant heater 'A' control circuit is responsible for regulating the voltage supplied to the heater. When this circuit is not functioning properly and the voltage is too low, it can lead to issues with the DEF system, potentially causing the vehicle to fail emissions tests and triggering the check engine light.
Common Causes of P20BB Ford
- Faulty reductant heater relay
- Short circuit in the reductant heater wiring
- Defective reductant heater 'A'
- Corrosion or poor connection in the control circuit
- Issues with the powertrain control module (PCM)
Symptoms of P20BB Ford
- Check engine light is illuminated
- Reduced fuel efficiency
- Difficulty starting the vehicle
- Increased emissions output
- Reduced engine performance
How to Fix P20BB Ford
- Perform a thorough inspection of the reductant heater circuit and wiring for any visible damage or corrosion.
- Test the reductant heater relay and replace if faulty.
- Check the reductant heater 'A' for proper functionality and replace if necessary.
- Scan the powertrain control module (PCM) for any fault codes and reset if needed.
- Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P20BB Ford
The cost to repair a P20BB Ford code can vary depending on the specific cause of the issue. On average, the parts required for this repair, such as a reductant heater relay or the reductant heater 'A', can range from $50 to $200. Labor costs can add an additional $100 to $300 to the total repair bill. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to get quotes from multiple shops to ensure a fair price.
Need more information about the P20BB Ford code?
Need more information on how to fix the P20BB Ford code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P20BB Ford code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P20BB Ford Code
No Frequently Asked Questions about P20BB Ford Code found.
Discuss the causes and fixes for P20BB Ford OBDII Code
Code P20BB Ford comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.