2002 S40 P0700, P0118

dbm123 · Post by **dbm123** » 14 Sep 2014, 14:34

All,
I bought my daughter a 2002 S40. I've had many Volvo's but never one of these little critters. I had the timing belt and water pump changed right after purchase. It has 140K. The car was going into limp mode while driving with the flashing up arrow (which freaked my daughter out). Based on the fact that I could row the shifter many times and it would temporarily fix it, I started reading. It looked like the PNP switch was the culprit. I have just changed it out today, all gears work, reverse lights work, etc. I hope this takes care of that. I hate to think what might be next if it doesn't. It is getting code P0118. I changed the Coolant Temperature Sensor and put in a new thermostat. It did not fix the problem and the fan on the car runs for a long time after you shut the car off and idle is all over the place. MAF would be next? Anything else I should check? Anything else I should know about these cars?

dbm123 · Post by **dbm123** » 15 Sep 2014, 09:11

Anyone?

Post by **regent** » 15 Sep 2014, 09:37

Can you connect to the OBD and see the actual EC temperature that the ECM can see? If the EC temp input is incorrect, there is usually a problem with AFR and idling issues or even poor performance when warm.

Since you've changed the ECT sensor, I am thinking of a possible wiring issue with its circuitry, which would cause the cooling fan to behave like you told. Or, what if the sensor output is not within specs (which is not uncommon with most el-cheapo non-OEMs)

dbm123 · Post by **dbm123** » 19 Sep 2014, 13:03

I replaced the MAF. Fan still runs on high after car is turned off. New symptom: surging when at idle and while driving... never over 2000 rpm but it can be a bit disconcerting. Is it being suggested that I put in another temperature sensor? I only have a super cheap ODBII scanner, I don't know if I can see temperature with it or not. A friend suggested cleaning the ICV ??? Suggestions welcome. I need to get this thing stable enough for my daughter to drive.

dbm123 · Post by **dbm123** » 20 Sep 2014, 09:29

Anyone?????

socals40 · Post by **socals40** » 21 Sep 2014, 18:06

Are the brakes hard to push when it's cold? Could be the idle air control

dbm123 · Post by **dbm123** » 22 Sep 2014, 09:56

I cleaned the IAC and the throttle body. All surging is now gone. I'm left with the fan that runs on high and stays on after the car is turned off. It goes off after about five minutes but its a battery drainer, for sure. I am at a bit of a loss. I suppose it could be the case that there is something wrong with the ETS, even though I just put one in. The temperature displayed on the dash is always correct, does that pull its data from the same sensor?

dbm123 · Post by **dbm123** » 22 Sep 2014, 13:20

Anyone?

mf70 · Post by **mf70** » 22 Sep 2014, 18:18

Half of the brains of this car are in the DiCE / VIDA support. I can't imagine doing that much work without having a secure diagnosis. I run VIDA on my WIN 8.1 netbook.

You'll be able to see into the operation of the car, to see why that high idle is being commanded.

There's a learning curve, but it's worth it.

dbm123 · Post by **dbm123** » 23 Sep 2014, 21:49

Anyone???