Related Tests, Information and Procedures

Diagnostic Trouble Code (DTC) table

NOTE:
- If malfunctions occur in the monitored sensors and components, these are stored in the DTC memory together with an indication of type of malfunction.
- DTCs relevant to "electronic throttle" are additionally indicated by a warning light (EPC warning lamp) located in the instrument cluster.
- Malfunctions which cause deterioration of the exhaust emissions are displayed via an exhaust warning lamp (MIL) which is also located in the instrument cluster. Some malfunctions cause the MIL to switch on immediately after detection. Malfunctions also may arise for which the MIL is only switched on when the malfunction is recognized again after the engine has been restarted.
- If the connector is unplugged from engine control module or if the battery is disconnected, all the stored values in the control module will be erased. However, the contents of the DTC memory are retained. If the engine is then started, it may run rough for a short period. In addition, the following adaptation procedures must be performed after reconnection.
Testing and Inspection.

- The DTC table is sorted according to the 5-digit DTC on the left.
- If a stored malfunction does not appear within the next 40 engine starts, the DTC will be automatically erased.
- Sporadic malfunctions are marked "SP" (sporadic malfunction) on the V.A.G 1551 display.
- Do not immediately replace components indicated as faulty by the V.A.G 1551 but first check the wiring and connectors of these components against the wiring diagram. Also check the ground connections against wiring diagram. This is particularly relevant for malfunctions recorded as "occurring sporadically" (SP).
- If DTC memory was erased, readiness code must be generated again.
Readiness Code, Generating