Question about 2002 Saturn L-Series
1. Clear code and start engine, if code does not reset stroke accelerator pedal to rev engine and see if code resets.
2. If code sets, lab scope the 2 Throttle Position Sensor (TPS) circuits on the throttle body (Purple wire pin D and Dark Green wire pin A) with a lab scope looking for glitches or drop outs as open the throttle plate. If there is no voltage check for the wire being shorted to ground.
3. Verify the Black and Black/White wires are good grounds and the Light Blue/Black and Gray wires have 5 volts.
4. Replace throttle body assembly if wiring is OK but sensors have glitch or drop out.
Accelerator Pedal Position (APP) Sensor
Throttle Body Module
P2105 does exist. However, it could be due to many reasons. Usually i have seen whenever there is a transmission problem. So, the first step would be to fix P1516.
For more information on U2105, read :-
Power Steering Warning Message on DIC with DTC U2105 and/or U2107 in the PSCM with any other U codes
Although the code(s) appear in the PSCM, these are communication codes and are not the result of a problem with the column operation or the control module. If the codes are in history, clear the codes and re-key the vehicle a few times to see if they come back. If they reappear, look for a communication issue from the BCM U2107 or ECM U2105 (wiring, connector, etc.) as the root cause. If the codes do not reappear after a test drive, return the vehicle back to the customer.
Let me know, if needed further assistance.
Hope i helped you.
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Posted on Nov 16, 2009
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Posted on Jan 02, 2017
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