Land Rover Repair: Error Codes: P0171 & P0174, mass air sensor, oxygen sensors

Question
Hi John,
I found out why my "Service Engine" light was on.  A friend of mine has the tool to find the error codes and the 2 codes that came up are P0171 and P0174.  I did a little research and they show the oxygen sensors to be bad.  What will be entailed to correct these problems?  Thanks!

Answer
Those codes mean your engine is running too lean on both sides.  That could be a result of a vacuum leak at the intake, a bad mass air sensor, a weak fuel pump, or some other issue that's making your engine lean.

IT DOES NOT MEAN THE o2 SENSORS ARE BAD!  So don't waste money on new ones.

Good luck!

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