Top 20 1991 Volvo 940 - Page 3 Questions & Answers

There is no default code, the are unique to the radio. You will have to go to the dealer to get this code.

Had you had the car scanned? It could be something else? Fuel pump, relay, fuse...
Is there any spark at the plugs? Is there fuel coming to the injectors?
There are a few things that can cause a car not to start, Is the engine light on?
Best way is to get the car scannd, if not you'll end up replacing unneccesary parts by trial and error.
Cheers

You could try another key if you have one. The key has a chip in it that the computer must recognize before it will start. There is a possibility that the key transponder has failed.

If that doesn't work you will have to take it to a reputable shop or to the dealer so they can run the diagnostics. There could be a problem with the antenna, the module, or just a communication problem between the two.

Sorry wish I had better news.

In order to get to it I think you have to take out the lower dash and radio, open up the heating case to reveal it.

no, its on the bottom, big 1" brass plug very bottom of engine, easiest to get to from the front, I own the same car....

An 8mm plug spanner did the job.

It could be a lot of things, but (in general, not specific to this car) it sounds like a 'turbo' problem/turbo air leak. Can you also hear a high pitched whining sound, or something sounding like an high pressured air escaping? Check under the hood for hoses that may have worn through or become disconnected because of busted O-clamps.

Check the fuel pump relay (white inside and back of fuse area behind the cig ashtray). They get old and quit.

Second, check frayed wires on the crank angle sender - they could be grounding out on the rear of the engine.

Perform a check on the ECT switch (toward rear of head under the intake manifold (hidden over the oil trap). It's a nuckel buster to remove, and ou don't want to break it.

Also check spark plugs for wear and gap. Check coil wire, and plug wires for jumping spark.

These sound like the classic Ethanol problems I was getting, keep using it in that model and it'll start stalling too!! For some reason the ethanol doesn't go well with our o2 sensor, cakes it with carbon from the alcohol, I poured a bottle of octane booster and filled up with non-ethanol and haven't had the problem since

Replace the dash light dimmer switch.

found waste gate on turbo sticking freed up ok now

Sounds as if you have set the immobiliser, does your car have the volvo guard alarm system fitted, (is the red light on the window frame?) I found that when reconnecting the battery if you just tap the connector on the terminal 4-5 times before connecting it it would reset the immobiliser and the car will start

Could be several things; MAF ( Mass air Flow) sensor, (Yes you should have one), could be fuel pump on the rail or the filter next to it, could be electronic idle controler, clogged injectors, ect ect, a Volvo dealer can do some simple checks of the actual components and tell you, but have someone else fix it!

first look in the owners man.and follow those steps for reset. if that doesnt work you may have to have a reprograme done at the dealer or an alarm/radio shop

Your problem is fuel gauge is hanging up on the fuel pump. The slide bar/fuel sender is located inside the fuel tank alongside the fuel pump. Today I removed my fuel tank and replaced the pick up strainer on my fuel pump and previously my fuel gauge didn't work, but all I needed to do was slightly bend the slide mechanism and my fuel reading read correctly on my gauge. Previous to that I showed no reading on the dash meter.

Bad starter i suggest...

Check fuses for fuel pumps, and the crank angle sensor on the back of the motor. Also check fuel pressure to make sure you are getting any fuel at all.

Also check fuel pump relay (white one in back of the fuse panel behind the cig ash tray). They last abaout 10 years and then they quit.

If you have spark from the coil your problem has to be ignition cap or rotor. The plug wires will not fail all at once. If there is adequate spark going in to the cap and nothing coming out look there first. What does I replaced everything mean?

Hi there's this website something like reliable-store and it is very amazing for manual for repairing servicing anything someone on fixya recommended it to me and I thank him even today They have full manuals and it's verrrrry cheap and mine I got free in offers 3rd time I bought it, I also had an issue with the file so the girl replaced it in 30 mins there is one website more but i don't remember its name it was 2 years back bitman something link this Try these out brother

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