P20A2 Code - Reductant Purge Control Valve Circuit Low
Quick Answer
In order to reverse the reductant flow direction (for line purge) a 4-2-way valve (reverting valve) needs to be switched. Common causes include Faulty Reductant Purge Control Valve, Reductant Purge Control Valve harness is open or shorted, Reductant Purge 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
- P20A2 indicates Reductant Purge Control Valve Circuit Low.
- Common causes
- Common causes include Faulty Reductant Purge Control Valve, Reductant Purge Control Valve harness is open or shorted, Reductant Purge 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.
Code P20A2 Description
The reverting valve functional check monitors the pressure drop when the purge cycle is started. To run this test the pressure level must exceed a calibration threshold (280 kPa) at beginning of test. For a successful test result, the pressure must drop by another threshold (230 kPa) within the time.
If the test is not successfully passed the purge cycle will be terminated immediately because of the risk of uncontrolled injection of reductant into the exhaust pipe.
What are the Possible Causes of the DTC P20A2?
- Faulty Reductant Purge Control Valve
- Reductant Purge Control Valve harness is open or shorted
- Reductant Purge Control Valve circuit poor electrical connection
How to Fix the DTC P20A2?
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 P20A2 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 P20A2 code?
Need more information on how to fix the P20A2 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P20A2 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P20A2 Ford — Reductant Purge Control Valve Circuit Low
Frequently Asked Questions about P20A2 Code
1. What are common symptoms of OBDII code P20A2 (Reductant Purge Control Valve Circuit Low)?
The common symptoms of code P20A2 include the Check Engine Light coming on, reduced engine performance, and potential issues with the vehicle's emissions system.
2. What are possible causes of OBDII code P20A2?
Possible causes of code P20A2 can include a faulty reductant purge control valve, damaged wiring or connectors in the circuit, a defective powertrain control module (PCM), or issues with the reductant system components.
3. How do I diagnose OBDII code P20A2?
Diagnosing code P20A2 typically involves using an OBDII scanner to read the code, checking the wiring and connectors related to the reductant purge control valve, testing the valve itself for proper function, and inspecting the overall reductant system for any faults.
4. Can I still drive my vehicle with OBDII code P20A2?
It is not recommended to drive your vehicle with code P20A2 present, as it can lead to reduced engine performance and potential damage to the emissions system. It is best to address the issue promptly.
5. How can I repair OBDII code P20A2?
Repairing code P20A2 may involve replacing the faulty reductant purge control valve, repairing or replacing damaged wiring or connectors, resetting the PCM, and clearing the trouble code from the system.
6. What are some tips for preventing OBDII code P20A2 from recurring?
To prevent code P20A2 from recurring, it is important to perform regular maintenance on the vehicle's emissions system, address any related issues promptly, and follow the manufacturer's recommended service intervals.
7. Can I clear OBDII code P20A2 without fixing the underlying issue?
While you can clear the trouble code temporarily, it is not recommended to do so without fixing the underlying issue causing code P20A2. Ignoring the problem can lead to more serious issues down the line.
8. Will OBDII code P20A2 cause my vehicle to fail an emissions test?
Yes, having code P20A2 present in your vehicle's system can cause it to fail an emissions test, as it indicates a problem with the reductant system and can lead to increased emissions.
9. How much does it cost to repair OBDII code P20A2?
The cost to repair code P20A2 can vary depending on the underlying issue causing the code, the labor rates in your area, and the cost of parts needed for the repair. It is recommended to get a professional diagnosis for an accurate estimate.
10. Is OBDII code P20A2 a common issue in vehicles?
While not as common as some other OBDII codes, P20A2 can still occur in vehicles with reductant systems. Proper maintenance and prompt attention to related issues can help prevent this code from appearing.
Discuss the causes and fixes for P20A2 OBDII Code
Code P20A2 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.
