Question about 1995 Volvo 940

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95 volvo 940 DL hesitates injector error codes 113, 212, 232

Car hesitates after 1st mile. Won't respond to gas pedel then shoots forward 1 second then almost stalls/ shoots etc.
Car runs well for a couple of days after fixes then acts up again. Fixes:
injector cleaner, spark plugs, fuel filter, mass air flow sensor.
codes:
113 - short term fuel trim (Lambda control) too rich/ lean
212 - HO2S signal absent or faulty
232 - adaptive fuel trim too lean or too rich at idling.
HELP!

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  • 4 more comments 
  • dmacdougal
    dmacdougal Jan 15, 2009

    All the fuses under the ashtray look good. Would the error codes tell if a fuse blows?
    Thank You!


  • dmacdougal
    dmacdougal Jan 16, 2009

    I found the fuel relay switch. Is that the same thing?

  • dmacdougal
    dmacdougal Jan 20, 2009

    There are two black boxes marked A/B for displaying error codes.
    The car is running alright now. I'm going to replace the muffler tomorrow hoping the back pressure helps keep it running. Can back pressure make a big difference?


  • dmacdougal
    dmacdougal Jan 23, 2009

    I did not find any bad fuses, but the car is running well now except that it is running very rich with black soot and getting10mpg !

    error codes:

    113 - short term fuel trim (Lambda control) too rich/ lean
    212 - HO2S signal absent or faulty
    232 - adaptive fuel trim too lean or too rich at idling.
    What do I do now??

  • dmacdougal
    dmacdougal Jan 28, 2009

    My car is starting to stall and go lunging again. I'm trying to find the PCV valve because it keeps blowing oil out of the cap. I've also tried to find a thermostat in the air filter housing that would prevent very hot air from burning out another lambda sensor in the MAF sensor. Is that correct?- is the lambda sensor the wire in the MAF Mass Airflow sensor. I'll also check the price of the egr, It sounds like I need a special air pump to test it. Thank You very much! Peace!
    Doug


  • Alex76 Jan 29, 2009

    I have a 1994 Volvo 940 with very similar issue. The error codes here are 122, 212, 222, 232,242, 214. My mechanic says the HETED 02 Sensor Signal is Missing. Do I simply need to replace the 02 sensor? He also is saying the Adaptive Fuel Trim is too rich. How do I fix that? Also the RPM Sensor is absent. Can I order this part? Is this a major problem? The tranny seems to lunge into gear at lower speeds, and the gas mileage seems pretty poor.

    Thanks

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  • 541 Answers

Check the fuse to the injector. If it is out or got wet, it could mimic these conditions. let me know what happens. I have an 85 model.

Posted on Jan 15, 2009

  • 1 more comment 
  • 240cpa Jan 16, 2009

    This fuse is not in the fuse block, it will be in the engine compartment. You say you have a 940 DL, is it not a 240? On my 240 the fuse is mounted on the driver's side fender under the hood.

    Has the engine gotten wet?

    You've done a lot of work. That tells me this is something simple. Check all the ground wires leading from the battery. One will lead you to that fuse, one will lead you to the mass meter. Either could be bad if they appear to be corroded. I once paid for a meter when all I needed was the wire replaced.


  • 240cpa Jan 18, 2009

    The relay should be checked but it's not the same. I found a 940 in a wrecking yard yesterday and it looks like the injector fuse is housed in one of two black boxes on the driver's side front fender.

  • 240cpa Jan 24, 2009

    Let me suggest that you get a Chilton or Haynes guide if you feel strongly about going further on your own. They will describe how to test the O2 sensors for functionality. My suspicions are on a faulty sensor, but you can spend a fortune changing them all. Could also be a bad EGR valve, which is a cheap fix. Are there any vacuum hoses that you haven't checked? I had a van that did this and it turned out to bad sensor in the air intake at the throttle body. Are you sure you didn't unhook something when you cleaned the throttle body that didn't get put back right? I would also double check the spark plug gap. You may need to pull the plugs and clean them anyway since it is running so rich.

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