P20AB Code - Reductant Injection Air Pressure Control Valve Stuck Closed
Quick Answer
The diagnostic trouble code P20AB indicates that the reductant injection air pressure control valve is stuck closed. Common causes include Faulty reductant injection air pressure control valve, Wiring or electrical issues, Clogged reductant injection system. 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
- P20AB indicates Reductant Injection Air Pressure Control Valve Stuck Closed.
- Common causes
- Common causes include Faulty reductant injection air pressure control valve, Wiring or electrical issues, Clogged reductant injection system.
- 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 P20AB Description
The diagnostic trouble code P20AB indicates that the reductant injection air pressure control valve is stuck closed. This valve is a crucial component of the vehicle's emissions system, specifically in vehicles equipped with a selective catalytic reduction (SCR) system. The reductant injection air pressure control valve is responsible for regulating the flow of air into the reductant injection system, which is essential for reducing harmful emissions.
Common Causes of P20AB
- Faulty reductant injection air pressure control valve
- Wiring or electrical issues
- Clogged reductant injection system
- Malfunctioning SCR system
- Software or calibration issues
Symptoms of P20AB
- Check engine light illuminated
- Decreased fuel efficiency
- Failed emissions test
- Reduced engine performance
- Rough idling or stalling
How to Fix P20AB
- Diagnose the issue by using a scan tool to confirm the P20AB code and inspecting the reductant injection air pressure control valve and related components.
- Replace the faulty reductant injection air pressure control valve if necessary.
- Check and repair any wiring or electrical issues.
- Clean or replace any clogged components in the reductant injection system.
- Perform a software update or calibration of the SCR system if needed.
Cost to Fix P20AB
The typical repair costs for addressing the P20AB code can vary depending on the specific vehicle make and model, as well as the labor rates in your area. In general, the cost of replacing the reductant injection air pressure control valve and addressing any related issues can range from $200 to $500. It is advisable to contact local auto repair shops to obtain a more accurate estimate based on your vehicle's specific needs. Keep in mind that labor rates can vary, with rates typically ranging between $80 and $150 per hour.
Need more information about the P20AB code?
Need more information on how to fix the P20AB code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P20AB code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P20AB Code
No Frequently Asked Questions about P20AB Code found.
Discuss the causes and fixes for P20AB OBDII Code
Code P20AB 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.