I just picked up a 2000 C70 with 17500 km on it. Was a theft recovery that sat in a sea container for 2-3 years. Test drove car and no signs of trouble. Drover her home and about 120 km later check engine light is on. Had a buddy use a reader and it waas P1171. Clearded it and was ok for a day. Next code was for misfire on c1 so we changed all 5 plugs. 10 km later the P1171 comes back on.ChangedO2,P1171 within 150 km. My guess is Mass Air Flow? Any otherreasonable quesses?
Thanks in advance....

 

Hi, I had a similar problem. In my case the thermostat was defective. Sensors etc was all ok. Check if your coolant temp is always in the low range (in the low 1/4 range). This indicates that the thermostat doesn't open. Replacement costs about 400 bucks.

 

If you are fairly handy, have the right tools, and have something to catch your coolant in, replacing the thermostat is a simple job. I did that about a year ago. Its pretty straight foward and easy. took about 1/2 hr from drain to refill. That way, all it costs you is parts, and coolant. Mine (99) was under 100 for everything.

 

Thermostats are less than 20 Bucks and take less than an hour to install if you don't know what you're doing. Where does 400 bucks come from?