Fault codes on a 440 single point injection 1996

volvoskim · Post by **volvoskim** » 08 Dec 2008, 11:36

Finally got around to reading the codes on my sisters 44o si. 1.8 litre
The LED as returned 121 and 223.
121 I think is the air pressure sensor,223 the idle control valve.
Question is where is the air pressure sensor located? ,there is no unit on the intake elbow as with the multi point systems

Post by **MadeInJapan** » 08 Dec 2008, 17:09

I don't know a thing about your sister's car but looking it up on VADIS, it sure is nice looking! Do you have any pictures to share? VADIS (when switched to European models- I'm in the U.S.) shows an "intake load pressure sensor" on the throttle body. I'm assuming this is the same thing as an air pressure sensor. It is #2 in the diagram below:

: Intake Pressure Load Sensor.jpg (23.64 KiB) Viewed 4210 times

volvoskim · Post by **volvoskim** » 09 Dec 2008, 13:09

Cheers for that,Ill have a quick look the nest time I bump into her.

I can take a few pics if you want.

Post by **billofdurham** » 10 Dec 2008, 15:45

1-2-1 is the Manifold Absolute Pressure (MAP) sensor, signal error.
Possible causes are wiring; vacuum hose split/blocked or the sensor itself.

To check the MAP sensor:

: MAP sensor.jpg (68.47 KiB) Viewed 3950 times

2-2-3 on the single point injection is the Idle Speed Control (ISC) actuator, signal error/signal absent.
Possible causes are wiring short or open circuit.

To check the ISC actuator:

: ISC actuator.jpg (75.81 KiB) Viewed 3937 times

MIJ - lots of 440 pictures at:

http://www.volvogallery.org.uk/showgallery.php?cat=3191

They were popular cars over here and there are still many of them on the road. My neighbour has a '95 1.9 turbo diesel in immaculate condition which can still return 53mpg on a motorway run at 70mph. (That is the legal speed limit and I think he is frightened to say that he is usually in excess of this.)

Bill.

Post by **MadeInJapan** » 10 Dec 2008, 19:48

Thank you Bill...nice looking sporty but small Volvo...wish we had it here.

volvoskim · Post by **volvoskim** » 11 Dec 2008, 10:47

Hi thanks for getting back.
Is the map sensor located on the bulkhead?

Post by **billofdurham** » 11 Dec 2008, 11:25

Yes.

This shows the locations of the engine management sensors and other parts on that car:

: Sensor locations.jpg (144.91 KiB) Viewed 3973 times

Bill.

volvoskim · Post by **volvoskim** » 11 Dec 2008, 11:54

Excellent,thanks for your help

Ian

volvoskim · Post by **volvoskim** » 17 Dec 2008, 14:18

I went ahead and replaced the MAP sensor,rather than checking it.
Anyway Im now getting code 112, or ecu problems, but the car as a lot more power.......puzzled!

Post by **billofdurham** » 19 Dec 2008, 12:14

If you have more power then the MAP sensor was probably iffy.

Check the Engine Control relay and the ECM:

: EC relay.jpg (26.31 KiB) Viewed 3936 times

: ECM.jpg (33 KiB) Viewed 3936 times

Bill.