Engine Management Light - MOT

[850 2.5 10v]

Went for an MOT last week and the car passed with flying colours.

Tester said engine was in rude health (151k) only 5ppm on something or other...

Anyway the engine mangement light came on after doing the idle / fast idle tests.

I have a "homemade" LED code reader that I have used to successfully read and extinguish light once before.

I got a 1-2-3 this time (all ok) but I can't get the dash light out!!

OBD port - wire in 16 and 3 and then dipping 5 as per instructions - won't work??

Any help appreciated.

Cheers

[5seaterT5x2]

Went for an MOT last week and the car passed with flying colours.

Tester said engine was in rude health (151k) only 5ppm on something or other...

Anyway the engine mangement light came on after doing the idle / fast idle tests.

I have a "homemade" LED code reader that I have used to successfully read and extinguish light once before.

I got a 1-2-3 this time (all ok) but I can't get the dash light out!!

OBD port - wire in 16 and 3 and then dipping 5 as per instructions - won't work??

Any help appreciated.

Cheers


think!!!! it should flash 1-1-1 for all clear think!!!! 1-2-3 may well be a fault code which is probably why the light wont go out the codes need to be cleared first i think!!!

[5seaterT5x2]

not 100% certain but this might help

CODE
Fenix 5.2 System
PROBABLE CAUSE for Volvo vehicles

1-1-1
No faults

1-1-2
ECU faulty

1-1-3
Fuel injectors; From 1994 and later, Heated oxygen sensor - maximum enrichment sensed
short term fuel mixture too weak

1-1-5
Injector no. 1 cylinder faulty signal

1-2-1
Manifold Absolute Pressure (MAP) signal absent or faulty

1-2-2
Air Temperature sensor 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

1-3-2
Battery voltage too low/high

1-3-3
Throttle switch signal (idle)

1-3-5
Injector no. 3 falty signal

1-4-2
ECU faulty

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 (only on some emission controlled vehicles)

1-5-3
Rear heated oxygen sensor signal

1-5-4
EGR system - leakage or excessive flow

1-5-5
Injector no. 5 cylinder faulty signal

2-1-2
heated oxygen Sensor Signal (front sensor on 1994 and later models) absent or faulty

2-1-3
Throttle switch signal (wide-open)

2-1-4
Ignition rpm sensor signal erratic, absent or faulty

2-2-1
Lambda Operation; also Heated oxygen sensor (mixture too rich under part throttle)
/ long term fuel mixture too weak in part load stage

2-2-2
Main relay signal absent or faulty

2-2-3
Idle air control valve signal absent or faulty

2-2-4
Coolant temperature sensor signal

2-2-5
A/C pressure sensor signal absent or faulty

2-3-1
Lambda adjustment; For 1994 and later, heated oxygen sensor (mixture too lean under part throttle)
/ long term fuel mixture too rich in part load stage

2-3-2
Lambda adjustment; For 1994 and later, adaptive heated oxygen sensor control
/ long term fuel mixture too weak at idle

2-3-3
Idle valve - closed or intake air leak / long term idle air trim outside control range

2-3-4
Throttle switch signal missing

2-4-1
EGR malfunction

2-4-5
Idle air control valve - closing signal

3-1-1
Speedometer signal

3-1-2
Knock/Fuel enrichment signal missing

3-1-4
Camshft position sensor signal missing or defective

3-1-5
EVAP emission control system

3-2-1
Cold start valve - signal missing

3-2-2
Airflow meter hot wire

3-2-4
Camshaft position sensor signal erratic

3-2-5
ECU memory failure

3-3-5
TCM request for MIL (CHECK ENGINE light)

4-1-1
Throttle switch signal faulty or missing

4-1-3
EGR temperature sensor signal incorrect or missing

4-1-4
Turbo boost regulation

4-1-6
Turbo boost reduction from TCM

4-2-5
Temperature warning level no. 1

4-3-1
EGR temperature sensor faulty or missing

4-3-2
High temperature warning inside ECU

4-3-3
No rear knock sensor signal

4-3-5
Front heated oxygen sensor - slow response

4-3-6
Rear heated oxygen sensor compensation

4-4-3
Catalytic converter efficiency

4-4-4
Acceleration sensor signal

4-5-1
Misfire cylinder no. 1

4-5-2
Misfire cylinder no. 2

4-5-3
Misfire cylinder no. 3

4-5-4
Misfire cylinder no. 4

4-5-5
Misfire cylinder no. 5

5-1-1
Adaptive oxygen sensor control, provides leaner mixture at idle

5-1-2
Oxygen intergrator at maximum lean running limit

5-1-3
High temperature warning inside ECU

5-1-4
Engine cooling fan - low speed signal faulty

5-2-1
Oxygen sensor preheating front

5-2-2
Oxygen sensor preheating rear

5-3-1
Power stage - group A

5-3-2
Power stage - group B

5-3-3
Power stage - group C

5-3-4
Power stage - group D

5-3-5
TC control valve signal

5-4-1
EVAP valve signal

5-4-2
Misfire on more than one cylinder

5-4-3
Misfire on at least one cylinder

5-4-4
Misfire on more than one cylinder, catalyic converter damage

5-4-5
Misfire on at least one cylinder, catalyic converter damage

5-5-1
Misfire on cylinder no. 1, catalyic converter damage

5-5-2
Misfire on cylinder no. 2, catalyic converter damage

5-5-3
Misfire on cylinder no. 3, catalyic converter damage

5-5-4
Misfire on cylinder no. 4, catalyic converter damage

5-5-5
Misfire on cylinder no. 5, catalyic converter damage

[850 2.5 10v]

1-2-3 ah not that one again - I have changed that bleedin temp sensor and thermo twice now.

Perhaps the car just got hot while stationary and flung up that code.

Do you think I should go to Volvo and get them to read the codes and do it properly?

[5seaterT5x2]

well i would say that if you have read the codes then you have read them.
possibly as you say it got a bit hot while stationary? maybe thermostat is on it's way and causing it to hot up did you put in a new temp sender or an old one?
would'nt be surprised if you cleared the faults (it's fiddly with the homemade jobby but certainly can be done but the wont clear untill all codes have been read) and it did'nt come back but your call i'm afraid. all i know is most dealers charge telephone numbers for labour per hour. Good luck gareth

[timbo_1975]

Is the cooling fan coming on when needed?

[850 2.5 10v]

I will check that out.

If it doesn't then yes there is a problem.

Haven't had an overheating problem (touch wood) though.

Thanks.

[850 2.5 10v]

Volvo kindly read the codes for free.

It was 1-2-3

All seemed fine they said - cleared the code and light out.

Monitor situation and perhaps replace thermostat first if caused more probs.

All ok for now.

[t5 pete]

Volvo kindly read the codes for free.

It was 1-2-3

All seemed fine they said - cleared the code and light out.

Monitor situation and perhaps replace thermostat first if caused more probs.

All ok for now.

How did you manage to get the codes done for free

[850 2.5 10v]

I had a good bit of work done on the car with them some time back nearly 1.5 yrs ago.

Lots of niggly things and a head off for a bolt replacement (long story!)

I just ask nicely over the phone and when I am in take time to have a quick chat with them.

Without even asking they gave me my radio code too - thought it might be helpful to me - also free.

Then I call back the service manager and say thanks after the event.

Politeness goes a long way I think.

Cheers