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PO171

Tiny
NUKEGUMBO
  • MEMBER
  • 1998 TOYOTA TACOMA
  • 2.4L
  • 4 CYL
  • 2WD
  • MANUAL
  • 215,000 MILES
I am getting a lean code on my truck. Changed fuel filter, fuel pump, O2 changed less than year ago. Fuel pressure forty two pounds when running. Here is the big question; There is no pressure with the key on engine off, could this cause the lean code/
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Thursday, December 8th, 2016 AT 5:59 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Lean codes are caused by a bunch of things, vacuum leaks for one. Retest fuel pressure see picture for checking. It may have a bad pressure regulator on it. Also, check brake booster as they can leak causing the vacuum leak.
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Thursday, December 8th, 2016 AT 6:30 AM

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