can I diagnose my car with OBD2 scanner w/out engine light on?

Asked by Christina Aug 31, 2020 at 08:31 PM about the 1998 Jaguar XJ-Series XJ8 Sedan RWD

Question type: Maintenance & Repair

XJ8 from 1998, has a rough idle & up to 25 MPH, has lost power, maxes at 45
MPH (without coughing) engine light is Not illuminated, engine did Not
overheat.
Can I use a OBD2 scanner to diagnose without the engine light being on.. also
will a OBD2 Scnr let me know if its as bad as a timing chain?

F_O_R answered 4 years ago

You may find some codes. A scanner that can read live data would be better than a simple code reader.

Mark helpful

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can I diagnose my car with OBD2 scanner w/out engine light on?

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can I diagnose my car with OBD2 scanner w/out engine light on?

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