P38 emissions fail - Land Rover Forums : Land Rover and Range Rover Forum
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post #1 of 2 (permalink) Old 03-16-2019, 10:53 AM Thread Starter
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P38 emissions fail

Hello all. Some advice needed please. My 2001 4.0L Thor failed its mot this week “Exhaust lambda reading on 2nd fast idle outside specified limits” . The vehicle hadn’t been used for a while and maybe the drive to the testing station was too short to get the engine warmed up correctly? I was thinking that corrective measures would be: new spark plugs and leads, clean maff sensor, clean lambda sensors, and take it out for a good run before the retest? Does that sound logical? I do have a nanocom that I have used for eka codes and suspension issues but don’t really have any idea how to use it to help diagnose emission issues. A badly leaking exhaust was replaced before the mot if that has any bearing?
Any advice gratefully received.

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post #2 of 2 (permalink) Old 03-16-2019, 06:04 PM
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Welcome to the forum Neil

Where are you located (assuming USA)???
Any fault codes/ warning lights on?
I have been a government certified Emissions inspector and repair technician since 1999 in Ontario Canada
Lots of other knowledge and resourceful members here

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2002 D2 se7 6 seater . complete engine rebuild with flanged liners , 2 inch lift, terrafirma shocks, LT 275/65r18 Cooper stt tires, d1 modified front bumper, safety devices rack, 30" l.e.d. Light bar
2004 D2 se5 (sold)
2001 D2 se5 (parts truck)
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