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Code C121A

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11K views 4 replies 2 participants last post by  BackNBlack  
#1 · (Edited)
A unfamilair code popped up after the engine light when on. The superchips DTC reader did not have a defintion for this code. I called Superchips and they said it is a dealership code. I called my dealership to get the info.

C121A - Steering Angle Sendor Not Initialized. Caused from battery disconnect, turn steering wheel lock to lock to initialize.

Here are some more codes.

Code Details...
P2098 - Post Catalyst Fuel Trim System Low Limit. Set by a lean condition.

P0420 - Catalyst System Efficiency Below Threshold (Bank 1). Drivers side #2 O2 sensor

C2114 - Dynamics Sensor Supply Voltage Low. ESP cut-off switch.

U0125 - Lost Communication w/Dynamis Sendor. ESP cut-off switch.
 
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#5 ·
Ghost said:
I have thrown the 2 codes beginning with P.
Click to expand...
You mean

PO420 and PO421 Catalyst System Efficiency Below Threshold Bank one and two!

Yep get , throw both codes at most, 1 time every two weeks!
 
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#3 ·
Ghost said:
Have you thrown all of those?
Click to expand...

Nope... just code C121a.

From what the service manager said, after reconnecting the negative to the battery make sure you do this before starting the car. If your wheels are not centered when reconnecting the negative... this code will pop up.

When googling for more info on C121a , there were other codes I figured I post.

Happy modding!
 
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