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Eng fault displayed

4.8K views 8 replies 5 participants last post by  mrvex  
#1 ·
Ok so the instrument cluster says eng fault call McLaren. No check engine light on. No codes stored. Goes into limp home mode (low boost) but otherwise sounds/ runs normal. Does this repeatedly and consistently. 17 with 22k on the clock. Any thoughts???
 
#5 ·
Could be a lot of things. Have a look at the IC to TB hoses and turbo to IC hoses to make sure they haven't popped off. Have you had any maintenance done lately?

Without a code it would be hard to diagnose, but I would start with a general peek-around the engine bay for anything obvious.
 
#9 ·
Bank 1 is lean. check for airleaks after the MAF sensor, piping around that area and all vac lines. Your fuel correction is working outside of its correction window so there is too much air getting into the engine. 100% your problem.