Code 21- Fixed????

fost9508 said:

Hissin,

Here is the table I used....Posted by jrichker, I didn't interpolated the voltage but it is aleast between the two know temp/voltage values.....dunno????

Hissin....not to hassle you to much, but I posted earlier about Code 94 and 44 ....post title something like Code 44 and 94 Update....could you read through it to see if you have any ideas?

Thanks


Code 21 – ECT sensor out of range. Broken or damaged wiring, bad ECT sensor. Note that that if the outside air temp is below 50 degrees F that the test for the ECT can be in error.

The ACT & ECT have the same thermistor, so the table values are the same

ACT & ECT test data:

Use Pin 46 on the computer for ground for both ECT & ACT to get most accurate readings.

Pin 7 on the computer - ECT signal in. at 176 degrees F it should be .80 volts

Pin 25 on the computer - ACT signal in. at 50 degrees F it should be 3.5 volts. It is a good number if the ACT is mounted in the inlet airbox. If it is mounted in the lower intake manifold, the voltage readings will be lower because of the heat transfer.

Voltages may be measured across the ECT/ACT by probing the connector from the rear. Use care in doing it so that you don't damage the wiring or connector.

Here's the table :

68 degrees F = 3.02 v
86 degrees F = 2.62 v
104 degrees F = 2.16 v
122 degrees F = 1.72 v
140 degrees F = 1.35 v
158 degrees F = 1.04 v
176 degrees F = .80 v
194 degrees F = .61

Click to expand...

Mustang5L5 said:

An ECT sensor is $25 or so from a parts store. Why not just replace it and be done with it??

Click to expand...