managed to read my fault codes

[T5Tom]

Ok so I got 1-2-1, 5-3-5, and 4-2-4

Any ideas lads? I'm not sure of the fault codes. Am I right in saying it will be the motronic 4.3 codes on the 1996 850 t5?

[nottsgreent5]

Think 121 is maf mate the one that starts with a 5 is a ac fault prob be best to goggle it lol

[T5Tom]

Think 121 is maf mate the one that starts with a 5 is a ac fault prob be best to goggle it lol

Managed to find the MAF one too, I'm sure i saw a post a while ago where someone listed all the codes? Can't find it now tho lol

[merc85]

CODE Motronic 4.3 System
PROBABLE CAUSE for Volvo vehicles
1-1-2 ECU faulty
1-1-5 Injector no. 1 cylinder faulty signal
1-2-1 MAF signal absent or faulty
1-2-3 Coolant temperature sensor signal absent or faulty
1-2-5 Injector no. 2 cylinder faulty signal
1-3-1 Ignition System RPM signal absent or faulty
1-3-2 Battery voltage too low/high
1-3-5 Injector no. 3 faulty signal
1-4-3 (front) knock sensor signal missing or sensor defective
1-4-4 Fuel system load signal (missing or defective)
1-4-5 Injector no. 4 cylinder faulty signal
1-5-2 air pump valve signal absent or faulty (on certain engines)
1-5-4 EGR system - leakage or excessive flow (on certain engines)
1-5-5 Injector no. 5 cylinder faulty signal
2-1-2 heated oxygen Sensor Signal absent or faulty
2-1-4 Ignition rpm sensor signal intermittently absent
2-2-3 Idle air control valve signal absent or faulty
2-2-5 A/C pressure sensor signal absent or faulty
2-3-1 Long term fuel mixture too lean or rich in part load stage
2-3-2 long term fuel mixture too lean or rich at idle
2-3-3 long term idle air trim outside control range
2-3-5 EGR controller signal absent/faulty (on certain engines)
2-4-1 EGR flow fault (on certain engines)
2-4-3 throttle position sensor signal voltage incorrect (out of range)
2-4-4 knock control at limit
2-4-5 Idle air control valve closing signal faulty/absent
3-1-1 Speedo signal missing
3-1-3 EVAP valve signal absent/faulty (on certain engines)
3-1-4 Camshft position sensor signal missing or defective
3-1-5 EVAP emission control system fault (on certain engines)
3-2-3 Malfunction indicator lamp signal faulty
3-2-5 ECU memory failure
3-3-5 request for Malfunction indicator lamp signal from auto transmission ECU
3-4-2 airconditioning relay control signal fault
3-4-3 fuel pump relay control signal fault
4-1-1 Throttle position sensor signal not within correct voltage
4-1-3 EGR temperature sensor signal incorrect or missing (on certain engines)
4-1-4 Turbo boost pressure too high
4-1-6 Turbo boost reduction from auto transmission ECU(/TCM)
4-3-2 High temperature warning inside ECU
4-3-3 rear knock sensor signal absent/faulty
4-3-5 heated oxygen sensor - slow response
4-4-2 air pump relay signal absent/faulty (on certain engines)
5-1-1 long term fuel mix too rich @ idle
5-1-2 short term fuel mix too rich @ idle
5-1-3 High temperature warning inside ECU
5-1-4 Engine cooling fan at low speed faulty
5-1-5 Engine cooling fan at high speed faulty
5-2-1 Oxygen sensor heating fault
5-2-3 signal to ECU module box cooling fan shorted to 12 volts
5-2-4 fault in transmission torque control signal
5-3-5 turbo regulator valve fault
5-4-1 EVAP valve signal fault (on certain engines)

[T5Tom]

So would 5-3-5 be the bcs then? I'm not even using it at the moment but it is plugged in, do you think this is why? And ill have to stick a new MAF on also by the looks of it booooo!

[merc85]

Could be a old code you have there buddy, clear them then drive and see which codes pop back up.