My truck keeps throwing a check engine light. Then it turns off. Instead of counting the flashing lights thing I spent the 35 bucks on Amazon and got a code reader.

Symptoms: Sometimes it chugs and acts like it’s gonna die when at idle. Not a lot but every once in a while. Cruise control has a mind of its own.

I received several codes. I did both engine off and engine running.

I received codes:

123/124c also 121r. All are Throttle Position sensor codes

181c O2 sensor code something to do with lean at half throttle

332c insuficiente EGR flow

452c speed sensor fault.

I’m pretty sure the Throttle Position Sensor is in need of replacement. So I’m going to go ahead and order that. Would a bad TPS sensor cause the O2 sensor to throw a code? Would a bad TPS sensor and speed sensor cause the cruise control to not work? Lastly if I’m not having issues how important is it to replace the EGR and tube? If I need to replace the EGR would I replace the valve first then the tube if the valve does not fix the issue? Or do they need to be replaced together? What about deleting the EGR? We don’t have emissions here and I doubt I’ll ever move.

Thanks!!!

 

The R behind the code is when it was running. The C means the problem happened but is not now and is stored in memory. KOEO codes must be cleared before going to Engine running codes and the truck should be at operating temp when you run any codes. Your only code in KOEO is the 123 indicating poor reading on the TPS. You can test it before you order one to make sure it is bad. Go to post 72 for info on how to test it. Video is also below. Sandy
https://www.ford-trucks.com/forums/1498719-help-cant-get-it-to-idle-after-rebuild-4.html

https://www.youtube.com/watch?v=_skVHdgtMTU

 

The 332c code has nothing to do with insignificant EGR flow.
More than likely bad vacuum lines.
Continuous Memory DTC 332 indicates the EGR valve did not open with the engine stabilized and the EVR solenoid duty cycle present sometime during vehicle operation.
Possible causes:
-- Obstructed or cracked hose to EGR valve.
-- Icing.
-- Damaged EGR valve.
-- Damaged EVR solenoid harness.

Yes the 452 code will cause the cruise control (SPEED CONTROL) to not work.
Continuous Memory DTC 452 indicates the PCM detected an error in the PSOM output signal during the last 40 warm-up cycles.
Possible Causes:
-- Damaged Rear Anti-Lock Brake Sensor.
-- Damaged PSOM.
-- Damaged harness circuits.
-- Damaged Powertrain Control Module (PCM).

 

Thanks for the info.

 

Have you reset the codes to see whats current?

Disconnect the battery for 5 rob10 mins...resets codes and recheck. Good feedback on the other responses...no need to repeat.