Replaced those damn little plastic inserts for the IMRC this past weekend. No more codes. I had the battery out of the truck for hours.

However....each time I take it to the shop for inspection The OBD says I have 3 incompletes. Evap, o2 sensor and o2 heater. In Texas to pass inspection you can have 2 but not 3.

No codes, just incomplete. Have driven the truck 200 miles and had the computer checked a number of times.

Shop is stumped and so am I. Should I reset the computer again?

 

No, that will just start the drive cycle all over again from scratch.

 

Give the exact code numbers please. The only incomplete drive cycle code is p01000 I think. if you have o2 codes and an evap code you have an issue with those. Give us the codes.

 

There won't be codes. Scanners will identify which monitors are incomplete by name.

 

No codes.

 

Try this to get the O2's ready:

1. The universal OBD-II drive cycle begins with a cold start (coolant temperature below 50 C /122 F, and the coolant and air temperature sensors within 11 degrees of one another). This condition is easily achieved by letting the car to sit overnight.

2. The ignition key must not be left on prior to the cold start. Otherwise the heated oxygen sensor diagnostic may not run.

3. Start the engine and idle the engine in drive for two and half minutes, with the A/C and rear defroster on if equipped.

4. Turn the A/C and rear defroster off, and accelerate to 90 km/h (55 mph) under moderate, constant acceleration. Hold at a steady speed for three minutes.

5. Decelerate (coast down) to 30 km/h (20 mph) without braking or depressing the clutch for manual transmissions.

6. Accelerate back to 90-100 km/h (55-60 mph) at 3/4 throttle. Hold at a steady speed for five minutes.

7. Decelerate (coast down) to a stop without braking.

 

glc is right. You need to get the OBDII system to be in the readiness state for inspection.

The newer vehicles will flash the CEL if you turn the key to ON (not ACC) if the OBDII system is not ready for Fed/State inspection circumstances.

 

Been having problems with the heater. Discovers the thermostat was bad. New Motorcraft part and truck warms up great now.

Is it possible the computer was having issues with the Incompletes due to the truck not getting to proper operating temp?

I plan to drive it a while tomorrow and then take by the shop to see if the computer is done yet.

 

Yes, if it doesn't reach normal operating temperature the drive cycle will not complete.

 

O2 loops closed. Damn thing passed!!

Evap still shows incomplete but I assume that will straighten out later.