Question about 1997 Ford Thunderbird LX

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What I have is 1997 Ford Thunderbird, a code comes up p0174? Can you help figure this issue out.

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  • Gary Queen
    Gary Queen May 11, 2010

    P0174 System too Lean (Bank 2) .. there are a couple things to set this off .. do you have other info(ie other codes, usability issues)



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  • 79,865 Answers

Garyq1970 ythose are called DRIVE-ABILITY ISSUES,

As far as the code P0174 goes 1st check for vacuum leaks, use a can of carb spray to do this test, if the engine RPM changes (increases) while spraying then there is a vacuum leak and this will cause the code, while u are at it clean the Mass Airflow Sensor, the spray cleaned is available at any good parts store it is made by CRC chemicals.
My knowledge base? 20 years as a Ford tech and 10 as a Ford factory certified Master Electronics Technician.

Posted on Dec 14, 2008


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P0174 System too Lean (Bank 2), hope this can help you!
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1994 Ford Thunderbird 4.6/V8- diagnostic codes: P0171 & P0174. What do they mean?

Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC is very similar to P0174, and in fact your vehicle may show both codes at the same time.

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FB.init("dd7d9e9681341cde77587bc6a2029f6f"); on Facebook Causes

A code P0171 may mean that one or more of the following has happened:

  • The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filtersmag-glass_10x10.gif may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
  • There could be a vacuum leak downstream of the MAF sensor.
Possible Solutions

Possible solutions include:

  • In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
  • Inspect all vacuum and PCV hoses, replace if necessary
  • Check for a dirty fuel filter

Jan 28, 2011 | 1994 Ford Thunderbird

1 Answer

1997 Ford Thunderbird

it is a lean code, most likely a vaccum leak of some sort.

Dec 02, 2008 | 1997 Ford Thunderbird LX

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