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[Craig32]

Hi Everyone,

Advice needed! I have a Omega 2.2 petrol (auto) y 22 xe engine. I am getting the following fault codes using op comm:

P 0130 (4) O2 sensor open circuit present

P1555 TPS load signal not plausiblemy with engine load present

p0170 (2) Lean exhaust present

Further investigation revealed:

B1S1 Air/Fuel (Bank 1 Sensor1) Rich

B1S2 Air/Fuel (Bank 1 Sensor 2) Lean

She drives ok. The spanner light comes on about 2/3 miles into the journey. I am going to give it a full service at the weekend including plugs and clean out the breather pipes/throttle body. Any enlightenment as to the above fault code fix's would be much appreciated.

Cheers. 

[Marks DTM Calib]

Look at the live values and post up the warm idle MAF figures 

[Craig32]

Will do on Thursday.

[Marks DTM Calib]

For info, P0170 is actualy a fuel trim malfunction 

[Marks DTM Calib]

For info, I expect you will find the Kg/h value to be less than 10

[Craig32]

2.2 Petrol Auto

Ok, these are the warm idle MAF readings:

8 Kg/H

0.25-0.59

@ 2000 rpm

22 Kg/H

118-130

Interestingly the spanner light did not come on today but the emission light came on. "My Naff Code Reader"M said open circuit 02 sensor P0130.

Does this spread any light???

[TheBoy]

I would be inclined to replace the front sensor

[Craig32]

Which front sensor would that be?

[Andy H]

Which front sensor would that be?

O2 sensor (Lambda sensor)

[Craig32]

Lamda sensor ordered. I suspect that's why she's such a pig to start from cold!

[TheBoy]

Lamda sensor ordered. I suspect that's why she's such a pig to start from cold!

Hmmm, not sure on that. The lamda isn't used until it goes closed loop. Although who knows what routines the ECU runs when in an error routine 

[Craig32]

I'm going to do the plugs and clean the throttle body out plus the emission/breather pipes this week and the change the 02 sensor. Will let you know what happens. Once she's got over the grizzles of starting from cold she's fine.

[Andy H]

Can you read the coolant temperature sensor with your code reader?

[Craig32]

I can read the temps with it. 

[Andy H]

I can read the temps with it. 

Do the readings make sense?
ie with a stone cold engine does it read about 10 degC (or whatever the temperature was last night)?

Also worth checking the air intake temperature as well in case it is a factor in the cold start calculation.