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Hi guys,
I've got one fault code on my B2 socket, it's code 122 (Air Temperature sensor signal absent or faulty). Anyway, this code will not reset. When I hold the button for 5 seconds, it never lights up again for me to hold it a second time and reset it.
Accompanying this problem is a check engine light which is directly related to my throttle. I get the light everytime I launch from 0mph and it tends to shut off around the time I shift to 3rd gear. It's worse when the weather is warm, also when the motor is warm.
Please help, I'm really trying to track this problem down and I'm not a real gear-head.
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1995 850 Sedan, Naturally Aspirated, 142k mi
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Your B2 - 122 code cannot be turned off if you have the cruise control switch turned on. B2 is the slot for cruise control. I just ignore the 122, it has nothing to do with the CEL. B2 - 122 is CC engage attempted below 25mph.
A CEL will turn on for A1, A2, A5, and A6. Eventhough the CEL turns off when you shift to 3rd, a code should still be stored. Check A1-6 again.
Klaus
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Well, after a few weeks of driving, one day coming home from school I noticed my CEL came on for the full 15 mile trip. By this time I had temporarily given up on trying to solve the problem, but thought that the light staying on for 15 solid miles MUST record a code. YES! It's back, the 241 code on B2. I brought it in to the mechanic to check the vacuum like you suggested and low and behold there was a leak in the flame trap piece. So, as of today I have the parts in hand (55 dollars worth) and it will be replaced on monday. I'd like to say thanks for helping out and donating your mental resources as usual - you are extremely knowledgable about these cars! Presuming this fixes all the issues, your advice will have saved me about 250 dollars - and I'm very grateful for that.
Everyone on here is very helpful, I just wish I knew enough about Volvos to contribute as much as everyone else does. So, I will post another update if and when this problem is gone.
David
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1995 850 Sedan, Naturally Aspirated, 142k mi
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Thanks Klaus, like I said before you know just about everything about these cars, it's really impressive.
I have driven my car to school and back, also around town this weekend and so far no codes besides the B2 1-2-2 are coming up, yet that code was there before I reset them, and like you said it won't go away.
Is there a certain amount of time that the check engine light must remain ON before the code records? You said it should be stored but I'm getting nothing at all. I know some cars require the light to be on for a certain period of time before it stores it.
Honestly, I don't know where to go from here if I can't get a code.
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1995 850 Sedan, Naturally Aspirated, 142k mi
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Not wishing to sound dense on this end, but are your sure you are looking at the CEL or Service light? The Service light will come on for two minutes and then go off. You can reset the service light with the 2 boxes, just look it up on Bay13 or on this site 700FAQs.
There is no way you can get a CEL with out a code being stored first.
Klaus
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Yes I know, it is very, very strange. I'm sure it's not the service light, that one is orange and I reset it a while back. I'm getting a red light that is a picture of an Engine. Isn't that the check engine light? But no codes are coming up - now in a related strangeness, I do not get ANY codes from sockets A6, A7, B1 or B6. They do not blink 111, they simply do not blink at all. I'm curious if my code boxes are malfunctioning.
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1995 850 Sedan, Naturally Aspirated, 142k mi
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B1 is climate control, only used if you have ECC (temp readings on dials and variable fan speed). B6 is for power seats.
A5 is for TCU, also only if ECC.
A7 is for instrument panel, but only if you have a trip computer.
Can you drive around the block, just as soon as the cel comes on, stop, open the hood and check A1, A2, and A6...
A6 is ignition! Clean the socket, check the wires under the boxes. You must have access to the A6 socket. Electronic spray cleaner or brake cleaner do not leave behind any residue.
Klaus
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I drove it to school approx 12 miles and back today, same thing random check engine light from approx 0mph to 20mph, especially apparent up hills. I cleaned all the sockets and checked all the wires, everything seems to be in order. No sockets produce codes (except the erroneous 122 on B2). All other sockets either produce 111 or in the case of two sockets they do not produce anything whatsoever.
Some of the sockets, when I plug the lead into them, actually cause the LED to glow slightly and others do not. Those that glow seemed to blink the 111 codes, (and previously seemed to work fine) but I could go through them again if you think that's a red flag.
I'm not sure if you wanted me to check the codes while it is running with the check engine light on? I could try that, but I don't know if it will give me codes while the motor is running. Also, the CEL is intermittent, and does not stay on for very long while it is at idle - if it lights up at all. Sometimes when I start up the car, the light will come on for approx 1 minute if I just let it idle, if I drive it the light usually goes off within a second or two.
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1995 850 Sedan, Naturally Aspirated, 142k mi
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Well, you did it. I am totally stumped. You could go to an Autozone or Pepboys and have them try one of their hand scanners, free. Of course, you will have to pull out the "coin" holder so they can find the port.
Have them check it at rest and again with the engine started and the CEL on.
Some of my ports also glow red and I don't know why. I always wonder if there is a short somewhere.
Klaus
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