Engine Control System
Diagnostic Trouble Code (DTC) Table
NOTE:
- If malfunctions occur in the sensors and components being monitored, they will be stored in the DTC memory together with an indication of the type of malfunction. Notes on Engine Power Control (EPC) (drive by wire).
- Malfunctions relating to the electronic throttle are also indicated by the EPC (Electronic Power Control) warning light in the instrument cluster.
- Malfunction which decrease exhaust emissions are indicated by an Exhaust Malfunction Indicator Light (MIL), the MIL is located in the instrument cluster. As soon as certain malfunction are recognized, the MIL is switched on immediately. There are also malfunctions, were the MIL is switched on only after the engine is started again.
- Sporadically occurring malfunctions (temporary malfunctions) will be indicated on the VAG1551 display as "SP."
- The DTC table is arranged according to the 5-digit DTC in the left-hand column.
- If a malfunction is stored in the DTC memory and then does not occur again during the next 40 engine warm-up phases, the DTC will be automatically erased.
- Components that are indicated as being faulty by the VAG1551 should not be replaced immediately. Always start by checking the wiring, connectors and Ground (GND) connections for the component using the current wiring diagram. This is particularly important in the case of sporadic malfunctions (indicated by the letters "SP" on the scan tool display).
- If the connector for the engine control module is disconnected or if the battery is disconnected, all the learned values (adaptation values) stored in the control module will be erased, although the contents of the DTC memory will remain intact. The next time the engine is started the idling may be rough at first. In this case let the engine run at idle for a few minutes until the adaptation is fully carried out.
- After erasing the DTC memory, generate readiness code. Readiness Code, Generating