Scan the vehicle for stored fault codes. The check engine light may be from a bad sensor such as the oxygen sensor and is likely separate from the ABS light. For the ABS light, check for leaks first; a faulty pump, accumulator, or modulator is possible.
The owner of a 1992 Acura Legend reported a constant check engine light, a constant ABS light, and blue or gray exhaust smoke while driving and sometimes in park. One reply advised retrieving computer codes with a scan tool and said a bad sensor such as the oxygen sensor could cause the check engine light, while the ABS issue is separate. Another reply said the ABS system may be leaking or the pump may be bad and recommended checking for leaks first, noting the pump, accumulator, and modulator are often one expensive part. The exhaust smoke was not specifically diagnosed.
