Re: Flashcodes 940s
xntrick <email@example.com> wrote:
>>>OK thanks for the input ..iv now done the code check but it came up
>>>1-2-1 which is not in the list so im stumped as to what is the problem.
>> 1-2-1, for the 240s, means a bad/missing signal from/to the Air mass
>> Meter on the LH-2.4 and LH-3.1 fuel injection systems... BTDT!
>> It can be set by disconnecting the AMM when the ignition is on or the
>> car is running, so if that is the only code posted, clear it and drive
>> the car to see if it resets or stays at 1-1-1.
>> You never stated whether there were any problems with the car or you
>> were just curious.
>Oh there are problems indeed and as the car was stuttering i changed the
> fuel filter under the car and all was well for 2 weeks and now the
>problem has come back. Whats also strange is that the "Lamba sond"
>warning light has come on and wondered if its a problem i can sort
>myself rather than get ripped off taking it to volvo and it seems now to
>drive better since the warning light has come on ...spooky!!!
The warning light and poor running along with the 1-2-1 code would
indeed point towards an AMM problem. Check the following, one at a
1) remove the electrical connector to the AMM. Check to see tha tthe
wires are in good shape (partiucularly withoit the first 2 or 3 cm of
the connector) and also tha tthe connection itself is clean.
Connecting and disconnecting it a few times might help clean any oxide
2) remove and inspect the air tube that connects the AMM to the
throttle plate. It must be sound and free from holes. Put a strong
light inside and stretch the hose to check it for holes.
3) the inside of the AMM should be clean and free from crud. I have
cleaned them with electrical contact cleaner, but be sure that it
states, "Leaves no residue" and that it is NOT a lubricating spray!!!
The AMM is very delicate and must be handled with care. Do not use
4) there are electrical tests that can be done, but they can easily
show the AMM to be good when it is not. I know from experience! Spent
nearly two weeks trying to find a similar problem! Do a Google groups
search for the following subjects:
save me from running around....
still having problems with my 240
Still trying to get it running right
AMM - more Q's
5) after that, if the problem continues, the AMM is probably faulty.
Check the breaker's for a used spare. New ones cost around $800USD
here. Rebuilt ones can be had, but be sure to get a good warranty.
Randy & \ \/ /alerie's
'90 245 Estate - '93 965 Estate
"Shelby" & "Kate"