having issues codes 121,212,332.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
KOEO Code 121: Closed throttle TPS voltage higher or lower than expected.
Use a meter to verify the output at closed throttle. Reference:Fuel Injection Technical Library » Throttle Position Sensor (TPS)
CM Code 212: Loss of IDM input to EEC or SPOUT circuit grounded.
DTC 212 indicates a loss of IDM input to the PCM.
Possible causes:
-- Open harness circuit.
-- Shorted harness circuit.
-- Damaged or incorrect Ignition Control Module (ICM).
-- Damaged Powertrain Control Module (PCM).
CM Code 332: EGR valve opening not detected.
What year/model/engine truck do you have?
What issues are you trying to resolve?
Use a meter to verify the output at closed throttle. Reference:Fuel Injection Technical Library » Throttle Position Sensor (TPS)
CM Code 212: Loss of IDM input to EEC or SPOUT circuit grounded.
DTC 212 indicates a loss of IDM input to the PCM.
Possible causes:
-- Open harness circuit.
-- Shorted harness circuit.
-- Damaged or incorrect Ignition Control Module (ICM).
-- Damaged Powertrain Control Module (PCM).
CM Code 332: EGR valve opening not detected.
What year/model/engine truck do you have?
What issues are you trying to resolve?
Thread Starter
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New User
Joined: Aug 2013
Posts: 9
Likes: 0
I may have found the 212 i have a gray icm someone on here said it should be black havnt gotten the part yet what do you think the 121 code was my tps change it and code is gone egr code im still not sure about.
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