Cannot get rid of codes Help

[dpbrowne]

1999 XJ8 92,000 miles. I keep getting the P1071, P0174 and P1000 codes. I changed the MAS sensor and it went off for about 120 miles but now it is back on. Where should I look next? Car is due for inspection in New Jersey. Need help fast.

[djagman]

mayby you meen p0171 system lean.check the plastic lines for the crankcase vent they allways get brittle and yes cause a system lean code!!!!!and it is so easy to check the intake gasket for leaks and to replace one is about 1.4 hours at best!!!

['97ventureowner]

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