1998 Volvo V70 check engine light

JOJOLEE

MEMBER
1998 VOLVO V70
6 CYL
FWD
AUTOMATIC
192,000 MILES

I have two codes, po452, evap cntrl system pressure sensor low and p1308 manufacturer specific DTC. I PUT A PRESSURE SENSOR WHICH IS LOCATED ON TOP OF THE GAS TANK AND THE OTHER END HOOK UP IN THE NEAR THE FUEL PUMP WHICH IS IN THE BACK OF CARGO. IT DID NOT TAKE THE LIGHT OUT. What can I do to get thT CHECK ENGINE OFF.

Sunday, June 20th, 2010 AT 7:24 PM

1 Reply

JIS001

MECHANIC
3,412 POSTS

I barely remember an issue like this one. The A/C pressure switch and the atmospheric pressure sensor are tied together in that circuit. What you need to verify is that you do not have a short to ground in the signal wire. The last time I ran into this problem was a defective A/C pressure sensor that was the root cause. But that does not mean that the atmospheric pressure sensor or the accelerometer sensor has not failed either?
If I were to guess I would say the A/C pressure sensor has failed? The sensor is located on the A/C high pressure line. The connector has 3 wires. Wire colors will be brown with a pink stripe, blue with orange stripe, and voilet with white stripe.

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Sunday, June 20th, 2010 AT 11:57 PM