Slonik
New member
- Joined
- May 10, 2003
- Location
- Cupertino, CA
1999 Volvo V70R
We get this car with 40k miles on it, everything is OK. Check Engine light comes on. Take it to our mechanic (he does my 960), he runs VADIS and gets a code for the outside air temp sensor being bad (code 1100) and another code (forget which). From driving the car and listening to it he tells us that there is an air leak. He does a smoke test on it but cannot find the leak. Tells us that with enough time he’ll find it but we don’t have that time and so we take it to a different mechanic. The other guy also runs the computer diagnostic and tells us that he got an error for the air mass meter sending intermittent signals. He replaces the meter and we drive off. The car sits for two weeks, in a garage, not driven. We drive it again the check engine light is back. We take it back to the mechanic. He runs the diagnostic and gives us an error for the rear oxygen sensor signal too high (2A1A) and code 280A for the front oxygen sensor permanent failure as well as an error for the outside air temp sensor being out of range. He tells us this can be caused by the fog light's proximity to the sensor and by driving with the foglights on during the day it'll cause the sensor to get a false reading. This is feasable since we did drive the car to the garage during the day with the foglights on. He replaces the temp sensor, the front oxygen sensor and resets the codes. We drive off and after 50 miles the check engine light is back on.
I don't like how the mechanic just replaced the sensor. Could the light be coming on due to something in the wiring between the sensors and the main ECU? What if it's something as simple as that?
Tomorrow we're taking the car back to the last mechanic (the guy who replaced all the sensors and the air mass meter)... he gives a one year warranty on all parts and labor.
We get this car with 40k miles on it, everything is OK. Check Engine light comes on. Take it to our mechanic (he does my 960), he runs VADIS and gets a code for the outside air temp sensor being bad (code 1100) and another code (forget which). From driving the car and listening to it he tells us that there is an air leak. He does a smoke test on it but cannot find the leak. Tells us that with enough time he’ll find it but we don’t have that time and so we take it to a different mechanic. The other guy also runs the computer diagnostic and tells us that he got an error for the air mass meter sending intermittent signals. He replaces the meter and we drive off. The car sits for two weeks, in a garage, not driven. We drive it again the check engine light is back. We take it back to the mechanic. He runs the diagnostic and gives us an error for the rear oxygen sensor signal too high (2A1A) and code 280A for the front oxygen sensor permanent failure as well as an error for the outside air temp sensor being out of range. He tells us this can be caused by the fog light's proximity to the sensor and by driving with the foglights on during the day it'll cause the sensor to get a false reading. This is feasable since we did drive the car to the garage during the day with the foglights on. He replaces the temp sensor, the front oxygen sensor and resets the codes. We drive off and after 50 miles the check engine light is back on.
I don't like how the mechanic just replaced the sensor. Could the light be coming on due to something in the wiring between the sensors and the main ECU? What if it's something as simple as that?
Tomorrow we're taking the car back to the last mechanic (the guy who replaced all the sensors and the air mass meter)... he gives a one year warranty on all parts and labor.