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P0174 2001 Ford Windstar

P0174 2001 Ford Windstar - Fuel Injection System Too Lean Bank 2

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P0174 2001 Ford Windstar Comments |  Add Comment
Possible causes
- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
Help with Possible causes What does this mean?
Tech notes
The P0174 is a very common code for the 2001 Ford Windstar, the Intake Plenum Gasket ans seals needs to be replaced.. Here a link to a web site with information how to repair:
1999-2003 Fords Windstar Code P0174
Help with Tech Notes What does this mean?
When is the code detected?
- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
P0174 2001 Ford Windstar Description

With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.

In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the MIL (2 trip detection logic).

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