1998 S70 Driving instructons to clear CEL

Mr. Detail · Post by **Mr. Detail** » 02 Sep 2015, 11:10

Can anyone send me the link for those driving instructions where you have to drive different speeds
on the freeway before the computer somehow resets itself?
Got my Volvo in for annual PA emissions and the mechanic just called to tell me that his computer readout shows empty. Nothing. I did clean the battery terminals a few weeks back and that must have screwed up something.

Post by **kahl** » 02 Sep 2015, 11:22

Here ya go!

Mr. Detail · Post by **Mr. Detail** » 02 Sep 2015, 14:43

Thank you kindly, kahl!
The mechanic today I saw told me to drive the car up oon the freeway for 8 or 9 miles @ 60 mph.

Post by **abscate** » 03 Sep 2015, 06:39

AC off, please note.

The EVAP cycle is the tough one to get to " GO ready". I have a pathological V70'that takes 1000 miles to go ready. I probably have a tiny leak somewhere in the EVAP that keeps faulting the monitor until it finally goes ready.

If you removed the battery terminal, either one, you reset the ECU and have to do the drive cycle before an inspection. Same thing if your battery gets low voltage from leaving the lights on all night.

The EPA let's you have two monitors not ready on your ECU and still pass. If PA follows these regs, you can bring this to the attention of your inspector. NY follows this and my T5 has passed NY inspection twice with EVAP not ready