Ok, Here I go....02 volvo s40 104000 miles.

I started my car today and let it sit for a few minutes while I was chatting with a friend and noticed my car shut off by itself. I restarted it and noticed a heavy shake, sort of like it is going to stall out any second....I managed to get the car driving and once I started to drive it on the highway it felt fine and no shaking but luckily I did not have to slow down at all.

Once I got home I plugged my OBD machine and came up withh various codes. Are these codes somehow linked??

p0171-system too lean(bank 1)
p0456-evap leak small detected
p0301-cylinder 1 misfire
p0304-cylinder 4 miss fire
p0420-Catylic converer fault

What shall I do to clear out these issues or what steps should I take first?

Thanks for anyones help.

 

Greetings.

Check to see if Volvo has produced software upgrade for the ECU. Does S40 have direct ignition (ignition coil over every spark plug)? If not check the distributor & ignition wires for misfire, vacuum lines for the charcoal canister, catalytic converter should last a long time, and when it fails you smell therotten-egg smell from the tail pipeand there may be rattling heard from the cat.

Clear the codes with your OBD-II scanner if can to see if the problems disappear. If not,

Wait till others in the S40 forum jump in or till Tech comes back. Sorry I'm not privy to S40 so this is the bets advice I can give you.


JPN

 

This exact same thing happened to my '01 S40 about a week and a half ago except it took about 20 tries to get the car started and moving. My car threw almost all the same codes: p0236, p0108, p0301, p0304, p0171, p0133. Can anyone else help out? Thanks