Ran My Codes......Now What?

[Soopacharged]

I ran my codes today. They were as follows:

21 Engine Coolant Temperature (ECT) sensor out of range

24 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) sensor out of range

25 Knock sensor not tested (ignore if not pinging)

67 Park/Neutral circuit fault
Transmission Manual Lever Position (MLP) sensor circuit
(M) Intermittent Park Neutral Position (PNP) sensor fault

This all means nothing to me. How do I fix these? shrug

 

[BlackOnBlackATX]

21 Engine Coolant Temperature (ECT) sensor out of range

ok, this sensor is located in your thermostat housing, theres a bunch of posts out there on this one. its real easy to do, just a little wet, so be sure to drain some water out of your coolant system first.

24 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) sensor out of range

there have been a huge rash of posts on this one, but there was a ford bulletin saying it could be related to the extreme cold weather. so its tough to say that its definately broken, but its a $15 part, so you might as well change it anyway. this is located in your airbox, youll see it when you take the filter out. it comes in from the side. simple 5 minute job.

67 Park/Neutral circuit fault
Transmission Manual Lever Position (MLP) sensor circuit
(M) Intermittent Park Neutral Position (PNP) sensor fault

ok, this is your neutral sensing switch. it sits on top of the tranny and lets the car know when its in park or neutral to let the engine start when you crank the key. if your car isnt starting in park then put it in neutral and see if it starts up. if it does then you can probably wait on this one for a little longer, theyre kind of a pain to do, not impossible, but a pain. i recommend you pick up a haynes or chiltons manual.

25 Knock sensor not tested (ignore if not pinging)

well if youre not noticing a problem dont worry about it. although someone else may have a different opinion than i do.

good luck, if you need more help just ask.

 

[sdpatt]

Was your engine at normal operating temperature when you ran the test? If not, the first two temperature codes may not be faults. Try it again with the engine warm.

 

[Soopacharged]

sdpatt:
Was your engine at normal operating temperature when you ran the test? If not, the first two temperature codes may not be faults. Try it again with the engine warm.

No my engine was not warm I'll have to try it again. thumbs_u

 

[projectSHO89]

As Scott pointed out, make sure the engine is at operating temp for the KOER test to avoid false ECT test results.

The ambient temperature must be above 50F or 10C for the ACT/IAT test result to be valid.

For the 67 code, that is due to the clutch switch. That switch appears to be a DPST switch. One set of NO terminals are for the starter interlock, the other set of NO terminals is the sensing portion that signals the ECA that the clutch has engaged/disengaged (required for cruise control disengagement, if nothing else). See the circuit diagrams for ECA pin 30. PPL/YEL and BLK/WHT wires at the switch (89 colors).

There is no PARK or NEUTRAL sensing switch in an 89 SHO as those are exclusive to automatic transmissions.

Steve