You might want to do it today before you damage your cats also.

 

Its sitting for now. Should have some codes tonight for ya.

 

You need to invest in a ultra gauge or scan gauge also. I know cash is tight but get it when you can it is a very useful tool to have.

 

I have a 2003 Discovery II. 127,000 miles. The amber service engine light came on, I had a mechanic plug-in the diagnostic and he he said the code was for the front left bank O2 sensors. I replaced both upstream O2 sensors. The vehicle was fine for a very brief period. Next, when the engine was up to operating temperature for approximately 20 minutes, the amber service light came back on. I then started to smell exhaust in the cabin. At the next stoplight, I felt the vehicle idling extremely roughly.

Any thoughts? Replace the downstream O2 sensors as well? (at this point I'm afraid to let the kids ride in the vehicle… Any safety issues?)

thx

 

SOLUTION: for those interested

1. Note to self, always write down the exact codes. Persons on this forum are much more easily able to help when given the exact code.

2. I replaced the MAS (mass airflow sensor, $192) and per the advice of Disco Mike, on this forum, I also replaced the air filter with an OEM product ($30) from my local Land Rover dealer. I drove the vehicle to a local gas station mechanic, and he was more than happy to clear the codes for me for free (it only took two minutes). There were five separate code numbers, each related to one another in some manner.

3. I have driven the car approximately 50 miles since the repair. So far so good, no SES lights, no exhaust smell in the cabin, idling better. I am optimistic, however, if the SES light returns I will get the code from the mechanic and update this post.

Thanks again for everyone's help.