2001 S80 2.9

wizbang · Post by **wizbang** » 29 Aug 2018, 14:32

I've got this POS, 2001 S80 2.9 with 80k miles, that I'm trying to fix. I won't go into the sheer amount of crap that has failed on this heap but I'm too deep in debt to let it go now. It has been surging while driving at any speed, idles great, never cuts off. No codes/no service lights in dash. Took it to the stealership to diagnose. They said bad ETM (second failure in only 10k miles on a new one) and MAF codes came up but wouldn't provide that specific data to me. When I picked it up the check engine light was now on with a code PO113 (IAT sensor high circuit). Live data shows intake air temp a -40f steady. I cannot locate the IAT sensor on this engine. I tried asking Pelicanparts and their tech said I needed the metal engine temp sensor claiming it is the IAT! I've looked all over the web without success. I've found no picture of my engine (there is no ductwork crossing over the top from front to back) on the web either. When I resolve this PO113 issue I'm sending the ETM off to Xemodex for a rebuild and buying a new MAF (suggested I only use a Volvo part). Can anyone help me locate this IAT sensor?

Post by **RickHaleParker** » 29 Aug 2018, 15:50

I cannot locate the IAT sensor on this engine.

Intake Air Temperature Sensor (IAT) is integrated in the the Mass Air Flow sensor (MAF).

P0113 =ECM-1200 Intake Air Temperature (IAT) Sensor.

Diagnostic trouble code (DTC) information

Condition
If the engine has been running for 3 minutes and been idling for at least 60 seconds and the control module receives a signal from the intake air temperature sensor (integrated in the mass air flow (MAF) sensor) corresponding to a temperature lower than -29°C or higher than +129°C the control module interprets it as a fault and ECM-1200 is stored.

Substitute value
+20°C Three-way catalytic converter (TWC) preheating and idle air trim diagnostics are disabled.

Possible source

Signal too high:
short-circuit to ground in the signal cable
defective mass air flow (MAF) sensor

Signal too low:

open-circuit in the signal cable
short-circuit to supply voltage in the signal cable
defective mass air flow (MAF) sensor
open-circuit in the ground lead
contact resistance in terminals

Fault symptoms
Malfunction indicator lamp (MIL) lit.

wizbang · Post by **wizbang** » 29 Aug 2018, 17:21

Awesome. I was leaning towards that but had no references to work from. Thank you very much!

Post by **SuperHerman** » 29 Aug 2018, 19:57

I see from your other post you purchased the MAF. Install it and see what happens. For the ETM check your wiring harness I think I recall people reporting problems with the connector (but could be for another car). It is free so it cannot hurt to check the harness end and wiring. Give it a good cleaning - stick some pins in the socket to clean it out well (just don't go too big or you will hamper the connection)

If you bought a new ETM maybe it is warrantied. I have not heard issues with the S80 ETM other than they get dirty. Did you inspect yours for oil/carbon?

What do you have for a code reader? Did you run the built in diagnostic to see if the ETM is being communicated to?

wizbang · Post by **wizbang** » 29 Aug 2018, 23:00

I used a generic code reader. The only code (and check engine light) was PO113 pointing to a failed IAT in the MAF sensor. I haven't been able to find any information about diagnostics or any other viable information to repair this vehicle. The dealer told me the ETM and MAF were bad. They didn't provide any additional info and kept all diagnostic data when I told them I'd not have it repaired at a cost of $1300 plus the diagnostic fee of $150. This ETM only has 10k miles on it. That ETM was purchased by a retired service tech and installed for my mother only to find that the dealer had to program it. She has passed and I can't find any paperwork on the repair. If I hadn't invested so much money in this car it would be at the junkyard. Since my mother purchased it new I'm aware of the following on a 80k miles vehicle. Two sets of front struts, front calipers, front brake hoses, tie rods, alternator, radiator and hoses, sunroof (exploded for no reason while parked in garage), timing belt kit (tensioner grenaded taking out everything associated), water pump (while I was replacing the timing belt kit) and two ETMs. That what I know of but there are probably other things my mother never mentioned. This POS is a really nice ride when it's running. It makes all of my Land Rovers look like a Honda in reliability comparison. I'm sending the ETM to Xemodex for a rebuild since they'll warranty it for life which is something the dealer snickered about. I also ordered a MAF from IPD.

Post by **SuperHerman** » 30 Aug 2018, 00:31

Check your connections after you get the MAF installed. Clean your throttle body and see how it goes. Also look here maybe you get lucky and have a fuse issue: https://xemodex.com/us/pdf/QMSF-1025%20 ... 0CHECK.pdf

Looking into your issue it appears you have the famous MM throttle body that has known issues. I had one on a 2001 XC70 that I converted to a contactless system. No more problems. Usually the MM ETM lasts 100k or so. Volvo had a recall on them and paid for the repairs. Maybe look into this, warranty may be up.

Having a Range Rover I have to say no way they are close. The Rover is much worse.

Look up the self diagnostic function built into your car on the internet. If you have a communication error, I think the self diagnostic will tell you. Cannot hurt to look.

wizbang · Post by **wizbang** » 30 Aug 2018, 05:27

I've owned over 30 Land Rovers including Series, 110, RRC, P38, D1, D2 and LR4. I'm presently down to 6. That said they can be a PITA too but I've never owned anything with so few miles that had so many failures. I'll try to find the self diagnostic function info to check it out. I can say when parked and idling the live data shows the TPS bouncing between approximately 5 and 14 with little between. The Xemodex ETM uses the contactless TPS.

Post by **oragex** » 30 Aug 2018, 06:44

Don't know on the S80 but on the S60 the IAT is right on the MAF unit www.youtube.com/watch?v=-bejldUOfVs

But at this point I'd go only with used parts from the scrapyard or Ebay. Throwing money on new parts (or visit the main dealer too much) will soon get a little depressing. Same for the ETM

Post by **June** » 30 Aug 2018, 08:27

wizbang wrote: ↑29 Aug 2018, 23:00 I used a generic code reader. The only code (and check engine light) was PO113 pointing to a failed IAT in the MAF sensor. I haven't been able to find any information about diagnostics or any other viable information to repair this vehicle. The dealer told me the ETM and MAF were bad. They didn't provide any additional info and kept all diagnostic data when I told them I'd not have it repaired at a cost of $1300 plus the diagnostic fee of $150. This ETM only has 10k miles on it. That ETM was purchased by a retired service tech and installed for my mother only to find that the dealer had to program it. She has passed and I can't find any paperwork on the repair. If I hadn't invested so much money in this car it would be at the junkyard. Since my mother purchased it new I'm aware of the following on a 80k miles vehicle. Two sets of front struts, front calipers, front brake hoses, tie rods, alternator, radiator and hoses, sunroof (exploded for no reason while parked in garage), timing belt kit (tensioner grenaded taking out everything associated), water pump (while I was replacing the timing belt kit) and two ETMs. That what I know of but there are probably other things my mother never mentioned. This POS is a really nice ride when it's running. It makes all of my Land Rovers look like a Honda in reliability comparison. I'm sending the ETM to Xemodex for a rebuild since they'll warranty it for life which is something the dealer snickered about. I also ordered a MAF from IPD.

$1,300 plus diagnostic fee of $150? At a legitimate Volvo Dealer? Report the dealer to Volvo North America. The $150 fee should be dropped if the car is repaired, not added to the bill. No diagnostic fee is one of the Volvo guarantees to the customer. Note the recent repair ticket on my daughter's car. My dealer here in Jacksonville charges no fee I might add anytime I bring my S80 in.

Also you listed repair your mother did over the car's life, but what have you spent all this money on repairs replacing? Ie what has recently been breaking, it might be pertinent to what's going on currently. Truly nothing your mother replaced is abnormal for any brand car during a 17 year period. Struts, breaking components definitely are wear items, the ETM on early models is a known issue and resolved by replacing with a updated design that superseded the original design. June

Added a photo of a service mailing from a Volvo dealer I had in a pile of mail laying around. Notice what I have circled. June

wizbang · Post by **wizbang** » 30 Aug 2018, 09:14

This S80 only has 80k miles. Since I've owned it (10k miles ago) I've had to replace the timing belt kit (when the tensioner exploded), water pump (because I was there) front calipers, front struts, alternator, radiator, MAF and ETM (this is the second ETM). This may be a 17 y.o. vehicle but it was driven by a cautious old woman and garage kept all of it's life. Other than the emergency brake boot the interior looks close to new. Only the normal fading of the black plastic and vinyl around the windows reflects it's age on the exterior.
I will be contacting Volvo about the diagnostic charge too, thanks.