Code Help

[redman275]

Just pulled the codes off a 1989 F-150 4.9 with the ecc4 system and was wondering if any one would know what would cause all these codes to come up and if you had a posiable solution

21 ECT out of self test range

22 BP / MAP sensor out of self test range

23 TP sensor out of self test range

24 ACT sensor out of self testrange

34 EVP voltage below closed limit

66 MAF sensor below minimum voltage

Thanks