OBDII codes from: 00 Disco II...Help

[mge_1]

Yup "Service Engine Light" light came on again today. I'll get it scanned again. So if I get almost the same codes does it mean time to replace the OD sensors? Which ones the ones before the cats or after cats? Any feedbacks would be much appreciated.

Thanks.

 

[mge_1]

Do you still get the OBDII codes?

I got the same codes and I just replaced the MAF ($175 from West Cost Rovers) and reset the codes at AutoZone. No prob for now.

which ones did you replace? the front or back sensors?

 

[joey]

MAF is the Mass Air Flow Sensor.... big thing between the air box and the intake.

If you are getting codes for O2 sensors I would get a good reading before changing them, unless you are high mileage (i.e over 80k) then you can replace the front two, the back two only tell you if the cats are working.

 

[mge_1]

Yes our DiscoII just hit the 80K mark.

 

[joey]

Then I would look into replace at least the front 2 O2 sensors if they are showing bad via the OBDII scan.

 

[mge_1]

Contacted Nathan from DiscountBritishParts and he has them in stock. Ordering it now. Ordered the 2 fronts for now. Hope it helps. Thanks JOEY!

 

[mge_1]

Joey - I replaced the 2 front 02 sensors and its sitll giving me these codes.

P0734: Gear Ratio 4 Incorrect
P1175: Manufacturer Contrl. Fuel Air Metering
P0172: Manufacturer Contrl. Fuel Air Metering
P0174: System Too Lean (Bank 2)
P0171: System Too Lean (Bank 1)

Should I try cleaning the MAF once again? What are the System Too Lean (Bank 1 and 2) means? I was hoping it would clear once I replace the 2 front 02 sensors.

Any other feedback would be much appreciated. Thanks.

Marc E.

 

[joey]

Generally these codes indicate either a dirty or bad MAF, I would try to clean again, but it may be bad....

 

[mge_1]

I took your advise and used 1 whole can of contact cleaner to clean it out good. already 150 miles of driving today and the light is not on yet. I'll scan it tomorrow. Thanks Joey.