Problem: Autel MaxiCOM MK808 is unable to clear error on the DCU(Dosing Control Unit) for 2020 Fiat Ducato 250. How to do, please help!
Possible Causes
Simultaneous presence of other errors in the DCU control unit.
Solution
Step1. Check With Diagnostic Instrument
Connect MaxiCOM MK808 diagnostic tool to the DCU control unit and check for errors:
P0562-00, P0563-00, P0641-00, P0642-00, P0652-00, P0653-00, P06A6-00, P13EF-00, P13F0-00, P13F1-00, P13F3-00, P13F7-00, P202D- 00, P202E-00, P203F-00, P2042-00, P2047-00, P2048-00, P2049-00, P204A-00, P204B-00, P206B-00, P208A-00, P208C-00, P208D-00, P208E-0 , P209F-00, P20BA-00, P20E8-00, P20E9-00, P20F4-00, P20F5-00, P20F6-00, P20FF-00, P214E-00, P214F-00, P21A8 -00, P21CB-00, P21CC-00, P21CE-00, P221D-00, P2BA9-00, U0001-00, U0075-00, U0100-00, U0401-00, U05A3-00.
Presence of at least one of the errors indicated?
– Yes
Follow the instructions in the checklist relating to the errors present.
Connect the Autel MK808 Diagnostic Tool and perform an error clearing.
– No
Continue to step2.
Step2. P2BAF-00 Error Evalidation Procedure
To clear the P2ABF-00 error, keep the MK808 diagnostic tool connect to the DCU control unit, go to the “Data” menu and check the value of the bit(0, 1, 2, 3, 4, 5, 6, 7) of the parameter “DCU/SCRM”.
Note:
The maneuvers described must be carried out without ever switching off the engine and with Stop & Start disabled.
Before carrying out these maneuvers, restore the minimum AdBlue level inside the tank.
– If the parameter has bit 0, to clear the error, keep the car in motion for 1 min.
– If the parameter has bit 1, to devalue the error, drive the car on an extra-urban route (respecting the rules of the highway code) for 5 mins.
– If the parameter has bit 2, to devalue the error, drive the car on an extra-urban route (respecting the rules of the highway code) for 20 mins.
– If the parameter has bit 3, to void the error, drive the car on an extra-urban route (respecting the rules of the highway code) for 20 mins.
– If the parameter has bit 4, to devalue the error, drive the car on an extra-urban route (respecting the rules of the highway code) for 20 mins.
– If the parameter has bit 5, to clear the error, drive the car on an extra-urban route (respecting the rules of the highway code) for 35 mins.
– If the parameter has bit 6, to void the error keep the car in motion for 1 mins.
– If the parameter has bit 7, to devalue the error, drive the car (respecting the rules of the highway code) for 20 mins covering 10kms with dynamic driving (braking / accelerating) so that the AdBlue liquid moves at the inside the tank.
Step3. Verification With Diagnostic Instrument
Upon returning to the workshop, connect the MK808 diagnostic tool to the DCU control unit(perform a key-off and wait for the control unit power-latch) and check that the P2BAF-00 error has been cleared.
Presence of P2BAF-00 error?
– Yes
Carry out the diagnostic procedure again.
– No
End of diagnosis.
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