Came across an issue where my 02 s55 amg is stuck in limp mode. EIS won’t always recognise key unless I go back and forth. When it starts it’s stuck in limp mode with no response from pedal. Here’s what I found

I recently discovered transmission fluid had wicked up the wiring harness and made its way into my Transmission Control Module (TCM), which I am currently addressing, but I want to lay out all the codes to see what else I should look out for (like the Front Passenger SAM module).

Here are the exact codes pulled from the scanner:

Engine / Powertrain Control Module

P202E-008 [State: Current and Historic]

Description: M16/6 (Throttle Valve Actuator) : Deflection Of Throttle valve (P0120)

P2006-002 [State: Historic]

Description: [B17/8 (Charge Air Temperature Sensor) : Short Circuit To Positive Or Open circuit (P0112)] or [B17/8 (Right Charge Air Temperature Sensor) : Short Circuit To Positive Or Open circuit (P0112)] or [B2/5b1 (Intake Air Temperature Sensor) : Short Circuit To Positive Or Open circuit (P0112)]

P2031-004 [State: Historic]

Description: No Or Incorrect CAN Message From Control Unit N80 (Steering Column Module) Communication Fault / See Also CAN Status In Freeze Frame data (P1999)

Drive Authorization / Shifter Module

P1925 [State: Historic]

Description: Drive Authorization Has Been Refused By Control Module N15/5 (Electronic Selector Lever Module (ESM [EWM]))

Transmission Control Module (TCM)

P2600 [State: Historic]

Description: The Voltage Supply Of Circuit 87 Has Undervoltage.

P2602 [State: Historic]

Description: The Voltage Supply Of The Valves Is Faulty.

Current Symptoms & Notes:

Scanner Voltage Readings: Showing ~12.4V with ignition ON, engine OFF.

Found Issue: I pulled the TCM and physically found transmission oil inside the module/connector (wicking up from the transmission pilot bushing plug)

 

Are you simply cleaning the TCM? Easy and effective.

 

yea I cleaned it and put it back in when the issues appeared. Also the SAM module