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Code P0068

Tiny
ED-WEEZY21
  • MECHANIC
  • 2003 FORD EXPLORER
  • 4.0L
  • 6 CYL
  • AUTOMATIC
  • 1 MILES
My friend has a 2003 ford explorer. I forgot to ask him what the mileage was so I'm sorry about that. It's the half pickup one if that matters. 4.0L. I scanned his check engine light and got P0068 MAP/MAF - Throttle Position Correlation. I'm not exactly sure what this code means. It mentions manifold absolute pressure sensor, mass air flow sensor, and the throttle sensor so I'm a little confused. He told me the mass air flow sensor was replaced already and the code came back. Can anyone help me out here please. I'm trying to do him a favor but I'm stuck myself. Thank you!
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Thursday, January 1st, 2015 AT 11:57 AM

5 Replies

Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
This code basically means that the throttle position sensor signal is not consistent with what the pcm would expect to see based on the mass air flow sensor signal or vice versa. This could be caused by a faulty throttle position sensor, a faulty mass air flow sensor, damaged wiring to/from either sensor, an improperly sealed or installed tps or damaged air duct or air leaks between the maf sensor and the throttle body, that is where I would start.
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Thursday, January 1st, 2015 AT 12:15 PM
Tiny
ED-WEEZY21
  • MECHANIC
  • 248 POSTS
Thank you for your response. So if I don't see any wiring issues or vacuum leaks, replacing the TPS sensor should take care of it right? Should I disconnect the battery for a few minutes afterwards to reset the adaptive values?
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Friday, January 2nd, 2015 AT 10:06 AM
Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
I would say it's a good possibility, without seeing the vehicle.I would just have the code cleared as opposed to dis-connecting the battery, it will produce the same results with a lot less risk.
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Friday, January 2nd, 2015 AT 3:18 PM
Tiny
ED-WEEZY21
  • MECHANIC
  • 248 POSTS
So I bought the TPS sensor and upon replacing, found that someone had previously broken the connector for the TPS sensor and it clearly wasn't making a good connection because I was able to separate them just by pulling it. I told my friend to go to a junkyard and cut one off and then splice it in, solder it, and heat shrink it and he said ok. He still had me replace the sensor trying to be hopeful and of course the code came back after driving it a little bit. Hopefully the new connector works.
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Sunday, January 4th, 2015 AT 8:27 AM
Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
Good let me know how it works out.
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Sunday, January 4th, 2015 AT 10:54 AM

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