Engine Control Systems

Diagnostic Trouble Code (DTC) Table

NOTE:
- When malfunctions occur in monitored sensors or components, Diagnostic Trouble Codes (DTCs) are stored in the DTC memory with a description of the malfunction type.
- Engine Electronic Power Control (EPC) relevant malfunctions are also indicated in the instrument cluster by the EPC warning lamp.
- Malfunctions that worsen emissions are indicated by an exhaust warning lamp in the instrument cluster.
- The DTC table is organized by the 5-digit code at left.
- If a stored DTC does not recur within the next 40 warm-up cycles, the DTC will be erased automatically.
- Malfunctions that occur sporadically (temporarily occurring malfunctions) are identified with "sporadic" on the display. The word sporadic means "appearing or occurring at irregular intervals, occasional".
- Do not immediately replace components that the VAS5051 suggests are faulty, instead: Check wiring connections and harness connectors to these components according to the wiring diagram. Also check Ground (GND) connections according to the wiring diagram. This is particularly valid when malfunctions are displayed as "sporadic".
- If the connector is disconnected from the ECM or the battery is disconnected, all adaptation values in the control module are erased. The DTC memory content will remain intact, however. If the engine is started after this, rough, uneven idle can result. In this case, the engine must be allowed to run at idle for a few minutes until the adaptation procedure has been completed.
- If the DTC memory was erased, Diagnostic Trouble Code (DTC) Memory, Erasing the readiness code must be re-generated. Generate Readiness Code