Uh oh, engine codes

imapaintballa said:

Hey everyone. Happy (non-denominational) Easter! Im getting codes 56, 65, and 66. These codes arent coming in 2's either, just one after the other. Is this normal?

These are the translations- KOEO test

56 - Vane Air Flow (VAF) or Mass Air Flow (MAF) sensor high
Transmission Oil Temperature sensor too high

65 - Check intermittent HO2S (signal or ground) - Fuel Control

66 - Vane Air Flow (VAF) or Mass Air Flow (MAF) signal low - VAF MAF
Transmission Oil Temperature (TOT) signal low (possibly grounded) - Transmissions

Please tell me what to do. Thanks so much.

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Ima, are these codes from your 92?
Any problems with how it runs?
The 56 and 66 are probably MAF related, and the 65 could be from the engine not being warmed up during the test and still being in open loop.

First thing to try is to un-plug the MAF sensor, and spray the connector with some WD-40. Push on the wiring loom as if to force the wires back into the plug, and see if that has any effect. Ford installed some bad connectors in some early 90's vehicles, and even had a recall on some models.....

All of that tends to point to the MAF as being the problem. I'd also try cleaning it before replacing. If you haven't done it before, do a search for "cleaning MAF" and you'll get lots of info on it.

Also check for vacuum leaks in the airtube between the MAF and throttle body. Make sure the clamps are secure and the tube isn't cracked.

There's a small PCV hose that runs from the throttle body to the valve cover (with a plastic elbow?), that meters PCV airflow; make sure it isn't clogged or cracked and leaking.

Basically you're looking for anything else that could cause the problem before replacing the MAF, since they're relatively expensive.....