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P1921

Symptom: No bus communication with the Trionic.

P1921


No Bus data From TRIONIC.





Fault symptoms

No bus communication with the Trionic.

Diagnostic help

Some of the following symptoms may be observable:


- Diagnostic trouble code (P1908 in Trionic, if Trionic can be contacted)

- Misfiring

- Engine will not start


Check wiring harness.

Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short-circuits in the leads. Observe the multimeter, test lamp or diagnostic tool during the test.