1999 Volvo V70 XC Q&A
1999 Volvo V70 XC Question: My 99' Volvo V70XC AWD has white exhaust smoke coming from the tailpipe.
ECM 4801 (Three Way cat conv (TWC) efficiency, bank 1 ECM 4308 Leak Diagnostic, major leak ECM 9400 (Brake pedal sensor- signal too low (faulty) (ECM 9400 this will be corrected today w/ new brake pedal sensor from Volvo.. Those are the three codes being read currently. Check Engine Light comes on and scanner states "Loose Gas Cap". ETS light is for the ECM 9400 (brake pedal sensor). I noticed some white smoke came from my exhaust while the car shifter was in the D (drive) but I was completely stopped talking to somebody. When I took stepped off the brake is when the car smoke came out. I've seen this every once in awhile but have not seen any smoke while car is parked and running. Help with codes diagostics and what could be the issues. Also, what to do? - fanchman6
Excellent information! This is really good. The Pedal Sensor will address the 9400 DTC, and hopefully the gas cap takes care of the 4308. The smoke and 4801 code are more difficult to determine. Have you been losing coolant? Has the engine overheated ever? Was the engine warmed up when you saw the smoke? - Bret Bodas