P20A2 FORD - Reductant Purge Control Valve Circuit Low
P20a2 Ford DescriptionIn 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.
Need more help?Do you need more help with the P20a2 Ford code? Ask a question to our users or find an automotive repair shop near you to help fix the OBDII code
P20A2 FORD CommentsHelp us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P20a2 Ford code? Have you replaced any parts?
Any information is appreciated. Thanks