Hey everyone. The "Service Engine Soon" light came on shortly after picking my '03 Disco up from the auto wholesaler. I don't really know much about this truck other than it was a one owner lease turn in with 51k miles. It needed an oil change and new rotors all the way around. I went to Auto Zone and pulled the following codes:

P0171- system too lean, bank 1
P0130- O2 sensor circuit malfunction, bank 1, sensor 1
P0139- O2 sensor circuit slow response, bank one, sensor 2
P1171- manufacture control, fuel air metering

Can this be fixed by replacing the O2 sensors? I run 93 octane. Carfax reported the last service was at 15k miles (6/2004). This will be a great truck, as soon as I iron out all the wrinkles. Thanks for any input.

Walt

 

Has it been tuned yet? Check the air filter for a real dirty filter.
You have a couple codes leaning towards a MAF, but I would replace it till I checked out the plugs and air filter.

 

No, it hasn't been tuned yet. I was going to change the oil and filters ( air included) tomorrow. I might as well change the plugs too. I ran into an even larger problem which I will also post on this forum, but here is the short version:

I sprung a coolant leak under the throttle body/(Intake) where two lines, one from the coolant resevoir tank and the other from the Thermostat (??) and theairintake tube from the filter box meet. I don't have my shop manual yet and being new to LR's, I am not quite shure if I should start trying to fix the problem. Is there supposed to be a gasket there? It looks as if someone tried to fix it withgasket sealer and plug the leak up. I just bought the truck and I am getting concernedover the increasing length of my fix it list!

Mike- Thanks for any suggestions, I appreciate your dedication to this forum.

walt

 

You need to start with a full 60K service, then see what codes show up.

 

60K service it is, then. Thanks Mike, I will update after its done

 

Here's my list as a guide.
This is the parts list for a 60,000 mile service or a high mileage used truck, the way I do it.
1 Oil filter, K&N 3001
1 Air filter
6 Qts of engine oil
12 Qts of ATF
7 Qts of 80/90W gear oil
2 Qts of Brake fluid
2 Qts of synthetic Power steering fluid
2 Gallons of OAT, orange coolant
1 Bottle of Lucas Power Steering additive
1 Bottle of Lucas Transmission additive
1 Can of Spray Carb. Spray
1 Can Of Brake cleaner
8 Spark Plugs, I use Bosch Platium Plus 4's
1 Set of Magnacor 8mm plug wires
1 Serpentine belt if not yet replaced
2 Bottles of SeaFoam


60,000 Mile Service or Major Service for High Mileage Used Vehicle just purchased
Bleed the brakes
Flush and change the power steering fluid adding one bottle of additive
Service the tranny adding one bottle of additive
Flush the coolant system
Do an engine flush before changing the oil
Do an induction cleaning
Clean the throttle body
Add fuel additive to full gas tank
Change both of the diffs fluid
Change the t/case oil
Replace the plugs and wires
Replace the air filter
Lube all the drive shaft grease fitting including the 2 slip shafts
Do full inspection of brakes, hoses, bushings etc.

Hopefully I didn't leave anything out.

 

Thanks, already started on a list, knowing the brands you prefer is a BIG help!