engine light and 121 and 414 codes

[drsyn]

Hi guys, finally got round to checking the error codes on my 850 T5R.

it is showing 1-2-1 and 4-1-4 both seems to have the MAF in common. The car symptoms are dodgy tickover when cold, drinking fuel and stalling/cutting out when slowing or stopped. On wide open throttle it flies no problems.

I've taken the MAF out and looked it over and I have no residue or gunge anywhere. I measured the various resistances betweens and they vary from 1300 ohms to 12 ohms. I don't know what to expect.

I've had a look at the small rubber hoses from the air intake which go from the large 3 inch air pipe just past the MAF to something bolted to the side of the engine, and they are a bit perished but surprised if these had suddenly gone.

I've cleared the codes, but before investing in another MAF wondered if you guys have any ideas on quick checks, access seems horribly tight on these hoses.

I've read people don't worry about 414 codes.

I am in eastleigh, near Jct 12 of M3 if anyone nearby has a MAF I could try, much apreciated.

Rgds

Julian

[Jod T5]

Originally Posted by drsyn

Hi guys, finally got round to checking the error codes on my 850 T5R.

it is showing 1-2-1 and 4-1-4 both seems to have the MAF in common. The car symptoms are dodgy tickover when cold, drinking fuel and stalling/cutting out when slowing or stopped. On wide open throttle it flies no problems.

I've taken the MAF out and looked it over and I have no residue or gunge anywhere. I measured the various resistances betweens and they vary from 1300 ohms to 12 ohms. I don't know what to expect.

I've had a look at the small rubber hoses from the air intake which go from the large 3 inch air pipe just past the MAF to something bolted to the side of the engine, and they are a bit perished but surprised if these had suddenly gone.

I've cleared the codes, but before investing in another MAF wondered if you guys have any ideas on quick checks, access seems horribly tight on these hoses.

I've read people don't worry about 414 codes.

I am in eastleigh, near Jct 12 of M3 if anyone nearby has a MAF I could try, much apreciated.

Rgds

Julian

With this code and your symptoms there would be no doubt in my mind the Maf is faulty, have you tried driving with the Maf unplugged?

Jod

[drsyn]

Hi Jod, thanks for the reply, just drove back from the gym and it stalled worse but that apart it didnt seem a whole lot different, so I agree it looks like the MAF has to go. I'll take it out sunday and check the numbers on the side.

any good places to shop for one ?

[glennethwest]

I've got similar problems with mine
414 - Turbo boost pressure too high
232 - long term fuel mixture too lean or rich at idle
121 - MAF signal absent or faulty

Any advice on a repair is welcomed!

[Jod T5]

Originally Posted by glennethwest

I've got similar problems with mine
414 - Turbo boost pressure too high
232 - long term fuel mixture too lean or rich at idle
121 - MAF signal absent or faulty

Any advice on a repair is welcomed!

Remove the codes and see what comes back....

Check the elbows at the side of the inlet manifold and at the Pcv valve...

Jod

[drsyn]

hi, we'll a hard call but I think it was worse without the MAF. So not sure now, will try and get garage to order me a part on sale or return.

I cleared the codes, and within 1/2 mile the engine light was back on with 414 and 121 again

[Jod T5]

Originally Posted by drsyn

Hi Jod, thanks for the reply, just drove back from the gym and it stalled worse but that apart it didnt seem a whole lot different, so I agree it looks like the MAF has to go. I'll take it out sunday and check the numbers on the side.

any good places to shop for one ?

Was this with the maf disconnected it was the same?
Usually, with a naf Maf it will run better disconnected....

Only buy Bosch would be my advice...

Jod

[drsyn]

I spent some time last night looking at the vacuum pipe on the end of the manifold that Jod so kindly photographed and pointed out and it is in good condition almost new I'd say.

with all this stalling that's been happening I have been just starting the car in D, which I realise shoudl not be possible. ! So the A1 codes are

1-2-4 mode selector shorted at ground
3-2-2 wrong gear value
1-1-4 open short circuit to program selector

My feeling is it is now a MAF fault, but before I go and shell out on a new one, can anyone point me to what the A1 codes mean and could it be some clue to what has been going wrong ? causing stalling ?

finally what is the mode selector ?

[Chris_Rogers]

First thing, reset the codes and see which (if any) come back.

Mode selector is the sport/economy/winter switch.

Often they are damaged by spilt drinks etc.

I'd suggest you take it out and give it a clean.

Do the LEDs on it light up as you change mode, does the 'up arrow' on the dash work?

Starting on park is due to a PNP fault, I would expect a specific fault code for this to be logged as well.

http://volvospeed.com/Repair/pnpswitch.php

[drsyn]

well cleared the codes and re-checked for split hoses, and found one completely off ! hidden behind another hose, hoping this was it I made a new piece and connected it up, but it is the same. I went for a drive and it is getting worse stalls all the time now and doesn't really seem to go very hesitant and more like a 998cc engine up front !

checked codes after the drive and all gearbox ones now clear, so cleaning switches has fixed that - thanks.

A2 though still showing 5-1-4 , 1-2-1 and 4-1-4. ignoring the 514 and 414 I am resigned to be shelling out for a MAF as it definately drives the same with MAF disconnected now ! I've cleaned all the contacts and done the insert the plug a few times. Only comment is my MAF has numbers different to the ones on the Bosch site.

Mine is Bosch 562193A.

Anyone any ideas ?