☰
AutoCodes.com | All About OBDII Engine Codes
Find a Shop |  Ask Auto Expert
Ask a Question

P0174 Ford -what can cause code #P0171 & P 0174 0o a 1999 Mercury Marquis

0 like 0 dislike
369 views
by

We have already replaced the spark plugs, both oxygen sensors before the catalitic converters, and the M.A.F. sensor. Lost on what to do next.

Vehicle: 1999 Mercury Marquis

1 Answer

0 like 0 dislike
by (13.5k points)
P0171 and P0174

Lean bank codes ,what also needs to be check is fuel pressure,the fuel pressure specification is 210-310 kPa. This is with engine running

Related questions

0 like 0 dislike
1 answer 879 views
What does code P1299, and P0174 mean on a 1999 Mercury Grand Marquis LS?
asked Jul 17, 2018 by
0 like 0 dislike
1 answer 607 views
What can cause code #'s P0171 and P0174 on a 1999 Ford Windstar 3.8L?
asked Sep 9, 2018 by
0 like 0 dislike
1 answer 566 views
1999 Ford Explorer V6 4.0 what can cause a P0174 code failure?
asked Mar 24, 2018 by
0 like 0 dislike
1 answer 1.8k views
Mercury 2001 grand marquis . ...which side is bank 1
asked Apr 24, 2018 by

33.7k questions

32.5k answers

1.3k comments

23.0k users

Need A Repair Shop?
Find local automotive repair shops in your area.
⚠ Check if your car have Safety Recalls

Related Information

- Car TSB
- Car Recalls
- Car Common Problems
- Car Safety Rating
- Car Technical Articles
- OBDII FAQ
- OBDII Components
- 2024 Cars MPG

All OBDII Codes

- Top 25 Codes
- Latest Codes
- All OBDII Codes
- Powertrain (P) Codes
- Network (U) Codes
- Body (B) Codes
- Chassis (C) Codes
Powered by Question2Answer
...