Pre-1997 Models

where to start with these codes ?

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Old 05-15-2014, 06:57 PM
jggalvan's Avatar
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where to start with these codes ?

Hi,

I have a 1993 f150 truck, suddenly started to fails in low speed until to reach a point where it stoped to work.

It never turned on the check engine light to indicate me that something was wrong, but because it stayed not working I decided to run the "key on machine off" test and it gave me the followings codes in this order:

23 TP OUT OF SELF TEST RANGE
34 EVP VOLTAGE ABOVE CLOSED LIMIT

PAUSE ABOUT 8 SECONDS..

1 LIGHT

PAUSE ABOUT OTHER 5 SECONDS..

22 MAP/BARO OUT OF SELF TEST RANGE
52 TP CIRCUIT ABOVE MAXIMUM VOLTAGE

Where do I have to start to undarstand what is going on ?

I am not mechannics but unfortunatly have no money now to take my truck to the repair center..

Any advice will be greatly appreciated !

Jose.
 



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