Chevrolet Repair: Saturn L300 service light w/wrench, 2001 saturn l300, powertrain control module pcm

Question
There wasnt a Saturn expert, but saturn is made by Chevy so I thought you might know. I have a 2001 Saturn L300 and the Service light with the wrench has been on for a few months now. About 2 months ago I took it to a shop and had it diagnosed and they said that nothing showed up on the computer. Then about 2 weeks ago my service engine soon light came on so I went to Auto Zone and used their diagnositc computer there and it read P0050 which was a heater circuit. I took it to a shop and got that replaced, hoping my service w/wrench light would also turn off, but it didn't. Only the SES light went off. They also diagnosed my car to try to find a code for the SE light, but none came up. Is there a way to manually reset the light? Or do I have to take it to a dealership? I'm starting to think that the light is malfunctioning and there really isn't anything wrong... please help! We even unplugged the battery for 15 minutes to see if that would help, but it came right back on when I started the vehicle.

Answer
Hi Sophia, The SERVICE (Wrench) telltale is turned ON by the cluster when it receives a command from the powertrain control module (PCM) or the body control module (BCM). The PCM or BCM will turn the SERVICE (Wrench) telltale ON for all non-emission related diagnostic trouble codes (DTCs) that require that a telltale be turned ON, some DTCs do not turn ON a telltale but are stored to aid in diagnosis.

The SERVICE (Wrench) telltale will also be turned ON if the Antilock Brake System (ABS) control module has detected a fault in its own warning indicator system. If the ABS cannot turn ON its own telltale, a message will be sent to the BCM through the Key Word 2000 data bus to turn ON the SERVICE (Wrench) telltale.

The SERVICE (Wrench) telltale will be turned ON by the cluster for 2-3 seconds, when the ignition is turned to RUN, for a visual system check.

Hope this helps

Have a Great Day             Mark