Diagnosis: P2195 01/04, P2197 02/04, Po171 03/04, Po174 04/04

210

Asked by May 27, 2013 at 07:46 PM about the 2004 Mercury Grand Marquis LS Ultimate

Question type: Maintenance & Repair

What is the Problem???

3 Answers

100,365

Believe it or not but all 4 codes are referring to a lean condition, possible fuel supply or pressure, also check for unmetered air into the system. so check for vacuum leaks and intake manifold leaks.

1 of 1 people found this helpful.
28,495

yes as tennisshoes said check for vacuum leaks.

1 of 1 people found this helpful.

Wat is oem number p0201 and p0204

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