Land Rover Repair: SES Light on 2000 Disco II, mass air flow, obdii code reader


Question
John, I have read through many of the threads on the site about this.  I bought my disco, and on the way home the light came on.  This happened in the beginning of may and so begins the saga.  I called the dealership that sold me the car due to the fact it will not pass emissions and I can't even title it in my name with out passing.  They basically told me tough.  I have had the computer reset twice.  The original code was for lean on bank one.  changed out the O2 and reset the computer.  Light came back on and now said lean banks one and two.  Had the rover mechanic replace the Mass Air Flow, and the light came back on again.  I replaced the bank 2 O2 sensor to see if that would work, and now the light is back on again...I am at my wits end, and other than going after the cats now I don't know what to do.  Just as a note after I changed out the last O2 I did not have the computer reset due to someone telling me that the computer would reset on it's own.  Let me know if this is right or not and any advise would be helpful.   Thanks

Answer
Hi Scott,

I understand your frustration.  I wonder if your state or province has lemon laws that can force the dealer to perform the needed repairs?  Clearly, the intention and expectations of the purchase was to have the Disco licensed and operating reasonably.

Do you own an OBDII code reader?  Something most LR owners should seriously consider if they plan to perform service work to save money.

I am always amazed when the dealer installs a part to fix a problem but does not resolve the problem.  Try to have them credit you the money for a part they said was the cause of the trouble - you'll see how cooperative these dealers are.   I once had almost $5000 in service work performed at the dealership.  I only drove 10 minutes out of the service bay when the problem reappeared.  I managed to drag the Disco back to the dealer and they took 2 days to discover that a $500 part was the cause.  Would they refund me the $5000 - do pigs fly?

It could be any number of sensors causing this.  I read once that temp sensor failure could cause these symptoms.  Another time, I read that leaking fuel injectors could do this too. It could even be the Idle air control valve, the throttle position sensor.  Although not as expensive as the MAF, they are upwards of $500 or more.

Swapping out parts to solve a problem is always very expensive for LR owners.  Send me an e-mail and include a general area where you live.  I'll try to find an independent LR mechanic that can help you out.  You'll need to rely upon an experienced LR mechanic to solve this, otherwise, you be shooting in the dark.

Regards,

JohnMc
jmcinnis64@hotmail.com