1997 900 s codes p1624 and p0741....check engine, check gearbox

DTC P0741: Torque Converter Clutch (TCC) - Stuck Off
Circuit/System Description
The torque converter clutch (TCC) pressure control (PC) solenoid is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The shift solenoid (SS) 1 supplies transmission fluid to the TCC PC solenoid when commanded OFF. The TCC PC solenoid regulates transmission fluid through the TCC regulator valve in the lower valve body and the TCC control valve in the pump, to the TCC when commanded ON and exhausts fluid when commanded OFF. When the TCC is applied, the engine is coupled directly to the transmission.

Your best bet , take it to a qualified repair shop.

What is the year make and model?

Here's a link to your code. P0741 OBD II Trouble Code

P0741 Torque Converter Clutch Circuit Performance Malfunction Cadillac...

This link has info on the P0741 code and associated function problems

code p0741 refers to torque converter clutch (TCC) solenoid--performance or stuck off===causes-- Wiring---TCC solenoid. I would consider replacing the TCC solenoid

Hi there:
DTC P1624 - MIL Request Signal active


This code is only the TCM (Transmission Control Module) telling the ECM (Engine Control Module) to turn on the check engine light.

If you don't have other codes there, could be a Communication Lost from the TCM; first I suggest to check all fuses and good harnesses conections correctly.



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1983 cadillac's can not set these code's . pre OBD2 vehicles do not set P0741 codes .

yes they are all right, i suspect that this vehicle uses encrypted software for the gearbox computer and this is the reason for the different codes ,i never use a code reader as on europeon cars they just show cannot connect to vehicle ,i use a voltmeter and a dwell meter plus a frequency meter and a scope to diagnose problems .So i suspect

P0741....Torque Converter Clutch Circuit Performance or Stuck Off

P0507....Idle Control System RPM Higher Than Expected

that this dealer doesnt have the correct diagnostic software because their code is a generic code as well as the first one ,A GM dealer code would have been P1507 and this code doesnt exist in the GM list of codes ,i think they are both right and need attention but the gearbox code is a fault with the front clutch operating mechanism ,i would advise ripping teh autobox out and fitting a manual gearbox ,lot less hassle

P1624- Pedal Position Sensor Potentiometer Supply Channel 1 Electrical.
The Siemens MSE43.0 Engine mamagement module is used on more than one model. The different meanings of the P1624 are based on your model.

The P1624 referenced here is for the MS43.0 engine management module with a note for M52 engines (323 / 328) that it is a coolant temperature below thermostat regulating temperature. You should have a M52 engine.

The MS42.0 engine mangement does not list a P1624 code in the Bentley manual.

The fault above cold be set due to the following:· Break/open in the wiring from the DME to the throttle motor(MDK).· The actuator or potentiometers inside the MDK could be contaminated.SOLUTION:
(If any of the faults listed are set) · Using a breakout box check for an open or short to ground in the wiring from the DME to the MDK.· If the wiring is intact then replace the MDK, then the adaptation values in the DME must be
cleared. Failure to do this will result in reoccurring faults.· Switch the ignition off for 30 seconds.· Turn on the ignition and delete the DME adaptations and the fault code
memory · Press the accelerator pedal to wide open throttle(WOT)4 times
MDK- motor driven throttle valve.

Code number p1624 is MIL Request Signal from TCM to ECM. which means malfunction indication light(MIL) is requesting a signal from your engine control module(ECM) or Transmission control module(TCM) i would reccomend u take it to the dealership to get it checked out.