OBD II Serviceability Issues: Notes

Based on the knowledge gained from On-Board Diagnostic (OBD II) experience in the 1994 and 1995 model years, this list of non-vehicle faults that could affect the performance of the OBD II system has been compiled. These non-vehicle faults vary from environmental conditions to the quality of fuel used. With the introduction of OBD II diagnostics across the entire passenger car and light-duty truck market in 1996, illumination of the MIL due to a non-vehicle fault could lead to misdiagnosis of the vehicle, increased warranty expense and customer dissatisfaction. The following list of non-vehicle faults does not include every possible fault and may not apply equally to all product lines.