90Mustangfan

Here we go I just pulled codes, The car runs great, it pulls hard runs strong...but the cel comes on when i decelerate the car, which is from the smog system prolly not working right anway...here are the codes
Koeo:
CM- 29-Insufficient input from vehicle speed sensor.
CM- 34-PFE or EVP circuit has intermittently failed above the closed limit of 0.67 volts.
CM- 51-ECT sensor signal is greater than the Self-Test maximum of 4.6 volts.
cm-96-Fuel pump secondary circuit failure. The EEC did not sense battery voltage on the Fuel Pump Monitor circuit.

Koer:
21-ECT out of self test range 0.3 to 3.7 volts.
94-Thermactor Air Injection system inoperative (left side).

Can anyone point me in the direction to fixing these or where to start checking...Im going to get a new ect sensor, to fix code 51, and i dont know why it says the egr position sensor is bad, the egr is supposibly working..

FiveLiterRiceEater

you have a bad speed sensor. i think its located on your trans. thats your code 29. dunno about the rest

PRO50SC

Any time I run into multiple codes, I clear them and drive it to see what comes back.

Joel5.0

^^^^X2....confirmation run. CM code 51 could have been caused by starting the engine with the ECT disconnected...and KOER code 21 because the engine was not at op temp (over 185° for the code not to show up) when self-test was run.