UK Car Repair Questions? Ask a Mechanic for Answers ASAP
Is the check engine light ON when the engine is running .
Was at anytime the system checked for codes .
First do a fuel pressure test .
And do a compression test .
When was the last engine tune up
Looking at these code a bad injector on number 5 could cause these codes ,
A fuel pressure leak down test should be done talk to the shop that did the last repairs .
this will confirm a bad injector ,and a back pressure test done on the exhaust to check and see if the cat has slight blockage
not letting it operate as should and giving the 2nd sensor the same reading as the first ..
A few test are going to be done to see what is causing this ,