Continental Simos PCR2.1 ECU Repair

Common problems

• Problems with ground connections
• Fault on 5 volt circuit

The Simos PCR 2.1 ECU can be found in many different models of VAG (Audi, Seat, Skoda and VW). In some cases faults are reported that have to do with the control of the injectors. Often it turns out not to be a fault in the ECU but elsewhere. We will explain below why.

Common faults and fault codes

The Continental Simos PCR2.1 is a VAG ECU that we see in for example the Volkswagen Polo 6R/6C, the Golf IV and the Caddy III. An often seen fault description on the remanufacture order form is the loss of control on one or more of the injectors. When testing the ECUs, we quite often find though that the control of the injectors operates normally. The feedback that we receive from our customers helped us find the solution to this fault!   

Nearly always, the cause of this problem is found due to discontinuity or too much resistance in the wiring. Especially the loom leading to the injectors needs to be verified thoroughly. The connectors on the injectors themselves do cause problems as well verify these. If the wiring and the injectors are working as they are supposed to, then it is possible that the fault is caused by the Simos ECU.

Fault codes for injector circuits in VAG petrol engines with a Simos ECU (manufactured between 2001 and 2008):

• 16585 / P0201 Cylinder 1, Injector Circuit Fault (N30)
• 16586 / P0202 Cylinder 2, Injector Circuit Fault (N31)
• 16587 / P0203 Cylinder 3, Injector Circuit Fault (N32)
• 16588 / P0204 Cylinder 4, Injector Circuit Fault (N33)