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2003 Ford Explorer check engine codes

Tiny
CKREISER
  • MEMBER
  • 2003 FORD EXPLORER
Computer problem
2003 Ford Explorer 6 cyl Automatic 90'000 miles

I recently installed a K&N filter and intake tube on explorer. Shortly after, check engine light came on. I checked the codes with hand held OBD reader and found codes 171 & 174. System to lean- Bank 1 or 2. After erasing the codes, to allow for the computer to re-set ( the instal directions stated ) the same codes are coming back every 2 or 3 weeks. The vehicle runs great otherwise and the new filter has improved power and mileage. I sure hope you can help me eliminate this anoying CE light?
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Monday, March 22nd, 2010 AT 9:47 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
A lean mixture is usually the result of a vacuum leak. Did you have to remove any when you installed this? Also is the maf sensor still connected?
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Monday, March 22nd, 2010 AT 10:29 PM
Tiny
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Maf. Sensor was re-installed and vacuum hose to intake received new clamps. Is there a way to clean the maf. Sensor, or should I buy a new one?
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Tuesday, March 23rd, 2010 AT 3:13 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Yes the maf can be cleaned. They actually make a special cleaner just for them. Most parts stores will have it.

Let me know if it helps.

Joe
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Tuesday, March 23rd, 2010 AT 9:36 PM

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