Originally Posted by
subford
Code 33, is not a KOEO code.
ER 12 indicates that during Engine Running Self-Test, engine rpm could not be controlled within the Self-Test upper limit band.
ER 33 in Key On Engine Running indicates that the EVP sensor input did not change after the EVR solenoid was instructed by the processor to open the EGR valve. Because a Code 84 was not received in the Key On Engine Off Self-Test, it is known that the EVR solenoid functions electrically. It is also known that the EVP sensor is in the expected closed valve range because Code 32 and 34 were not received in either Key On Engine Off or Key On Engine Running Tests.
ER 13 indicates that during Engine Running Self-Test, engine rpm could not be controlled within the Self-Test lower limit band.
ER 25 indicates that the Knock Sensor (KS) signal to the processor was not sensed during the Dynamic Response Test after the ID code in Key On Engine Running Self-Test.
Looks like a bad Idle Air Bypass valve.
Here all the names of the same item:
•Idle Air Bypass
•Idle Air Control
•Idle Speed Control
•Throttle Bypass Air
•Idle Bypass
•Inlet Air Controller
•Inlet Air Bypass
•Intake Air Bypass
•Intake Air Control
Thanks appreciate your efforts!!....I'll pass along this new information.
we did clean the Idle Air Control (AIC), it was very gunked up, but the interior plunger was moving, just laden with carbon... but
prior to the tune up he was experiencing a high idle, just not as high as it is now. To clean it we remove the AIC from the engine, then removed the solenoid from the AIC, sprayed it thoroughly with carb cleaner, let dry, then reattached the solenoid and returned it to the engine.
Is there a right or wrong way to reattaching the solenoid on the AIC?? the O-ring looked good, no cuts or anything. & the gasket to the upper intake was appeared good as well.
Secondly~ when reattaching the whole AIC to the engine, the solenoid faces towards the radiator yes???....that is the only way we can see that that can be installed incorrectly....pretty sure that is the way it came off.
thanks again for all the help