89 f150 5.0 codes

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Dec 18, 2010 | 07:07 PM

cptbarkey

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89 f150 5.0 codes

picked up this f150 at auction, starts and runs but throws some codes.

21 ECT out of Self-Test range MAP/BARO out of Self-Test range.
15 PCM Read Only Memory (ROM) test failed.
63 TP circuit below minimum voltage.
24 IAT out of Self-Test range.

can anyone translate?

Dec 18, 2010 | 08:18 PM

allen23923

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Joined: Jul 2005

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From: moonshine va

Ford Fuel Injection hope this helpssssssss

Dec 18, 2010 | 09:11 PM

cptbarkey

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sweet thanks, i think i might be low on coolant (havent checked), 21 and 24 seem to be related. 63 should be semi-easy. any guesses on the PCM error?

Dec 19, 2010 | 09:39 AM

rla2005

Fleet Owner

Joined: Oct 2005

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From: Kentucky

Code 21 could be caused by not warming up the engine before running the KOEO test. Code 15 is a concern as well, but it could be caused by pulling a fuse or battery cable when running the tests or some other problem with supplying battery voltage. 63 and 24 are also a little suspect as well.

One the other hand you have 3 sensors reporting signals out of range and a code related to memory problems in the PCM. All of those combined could lead one to believe the PCM is bad. If the truck is not experiencing any problems then I would discount the latter theory.

Pull a battery cable or PCM fuse for 15 minutes to clear the codes. Drive the truck for awhile then recheck for codes (with the engine and transmission at operating temperature).