AutoCodes – Generic – P20A6

P20A6 Code - Reductant Injection Air Pressure Control Valve Circuit/Open

Quick Answer

P20A6 indicates Reductant Injection Air Pressure Control Valve Circuit/Open. Common causes include Faulty Reductant Injection Air Pressure Control Valve, Reductant Injection Air Pressure Control Valve harness is open or shorted, Reductant Injection Air Pressure Control Valve 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: P20A6 indicates Reductant Injection Air Pressure Control Valve Circuit/Open.
Common causes: Common causes include Faulty Reductant Injection Air Pressure Control Valve, Reductant Injection Air Pressure Control Valve harness is open or shorted, Reductant Injection Air Pressure Control Valve 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.

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Code Popularity 5,448

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P20A6 Description

OBDII Code P20A6 - Reductant Injection Air Pressure Control Valve Circuit/Open - AutoCodes.com — P20A6 Code - Reductant Injection Air Pressure Control Valve Circuit/Open

What does this mean?

What are the Possible Causes of the DTC P20A6?

Faulty Reductant Injection Air Pressure Control Valve
Reductant Injection Air Pressure Control Valve harness is open or shorted
Reductant Injection Air Pressure Control Valve circuit poor electrical connection

How to Fix the DTC P20A6?

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 P20A6 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.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P20A6 Code

1. What are the common symptoms of OBDII code P20A6 (Reductant Injection Air Pressure Control Valve Circuit/Open)?

The common symptoms include the check engine light coming on, reduced engine performance, and potential difficulties with starting the vehicle.

2. What are the possible causes of OBDII code P20A6?

Possible causes of this code include a faulty reductant injection air pressure control valve, damaged wiring or connectors in the circuit, or issues with the reductant injection system.

3. How can I diagnose the cause of OBDII code P20A6?

Diagnosis typically involves using a scan tool to retrieve the code and then performing a visual inspection of the wiring and connectors related to the reductant injection air pressure control valve. Testing the valve itself may also be necessary.

4. Can I continue driving my vehicle with OBDII code P20A6?

It is not recommended to continue driving the vehicle with this code present, as it can lead to reduced engine performance and potentially cause damage to the reductant injection system.

5. How can I repair OBDII code P20A6?

Repairing this code may involve replacing the reductant injection air pressure control valve, repairing or replacing damaged wiring or connectors, or addressing any issues with the reductant injection system as a whole.

6. Are there any DIY tips for fixing OBDII code P20A6?

While some basic visual inspections and wiring checks can be done by DIY enthusiasts, diagnosing and repairing this code may require advanced knowledge and specialized tools. It's recommended to consult a professional mechanic for proper diagnosis and repair.

7. Is OBDII code P20A6 a common issue in certain vehicle makes and models?

This code can be more prevalent in vehicles equipped with reductant injection systems, such as diesel-powered vehicles that require selective catalytic reduction (SCR) for emissions control.

8. Can a faulty reductant injection air pressure control valve cause other issues besides triggering OBDII code P20A6?

Yes, a faulty valve can lead to poor emissions control, reduced fuel efficiency, and potential damage to the catalytic converter if left unaddressed.

9. How long does it typically take to repair OBDII code P20A6?

The repair time can vary depending on the exact cause of the code and the complexity of the repair. It's best to consult with a mechanic for a more accurate estimate based on your specific vehicle.

10. What is the importance of addressing OBDII code P20A6 promptly?

Promptly addressing this code is crucial to ensure proper engine performance, emissions compliance, and overall vehicle reliability. Ignoring the issue can lead to more severe problems over time.