Engine-Codes - Generic - P20A3

P20A3 Code - Reductant Purge Control Valve Circuit High

- Code Popularity: 4,345 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P20A3?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Reductant Purge Control Valve
  • Reductant Purge Control Valve harness is open or shorted
  • Reductant Purge Control Valve circuit poor electrical connection
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How to Fix the DTC P20A3?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P20A3 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P20A3 Code Mean?

In order to reverse the reductant flow direction (for line purge) a 4-2-way valve (reverting valve) needs to be switched. The valve is switched by a solenoid.
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.

P20A3 Code - Reductant Purge Control Valve Circuit High

Need more Information on the Code?

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Code P20A3 Information for Specific Makes

  • P20A3 Ford Reductant Purge Control Valve Circuit High

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