I have A 1996 Saturn Sl1 1.9 engine.I keep getting this code p1650c which is an emission code but my service wrench stays on all the time. Today my data link connector,interior light,automatic trunk release latch stop working today.I was told it was a QDM B Quad driver controlled circuit or component.Can someone please tell me what this is and how to fix it?
That is in the main computor of the car. The only way to fix that is to change the computor. I changed one in a saturn that had the same problem, put in new computor, problem solved.
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Are you doing diagnostic for the code's or are you just replacing parts ? With each code in a factory service repair manual is an associated diagnostic procedure , testing electrical circuit's for what ever sensor the code is for . Sounds like you should take your vehicle to a qualified repair shop that has the diagnostic equipment an knowledge . Sounds like you have no clue how OBD2 works . Just because you have a code reader does not mean you have the ability to repair OBD 2 vehicles .
Motor Age TST Diagnosing Driveability with Global OBD II
You don't even know what the wrench light is for ! You like making part stores rich ?
The SERVICE (Wrench) telltale is pulled to ground by the powertrain control module (PCM). When the lamp is pulled to ground, current from the ignition circuit flows through the indicator lamp, allowing it to come ON. The PCM will turn the SERVICE (Wrench) telltale ON for all non-emission related 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 ABS control module has detected a fault in its own warning indicator system. If the ABS system cannot turn on its own telltale, a message will be sent to the PCM through the class 2 data bus (circuit 1807) to turn on the SERVICE (Wrench) telltale.
The SERVICE (Wrench) telltale will be turned ON for 2-3 seconds when the ignition is turned to RUN for a bulb test.
NOPE CANT ERASE CODES UNTIL THE PROBLEM IS FIXED OR THE SERVICE ENGINE LIGHT SOON WILL STAY ON. CODE PO441 - EVAPORATIVE EMISSION EVAP SYSTEM INCORRECT FLOW DETECTED.CHECK INTAKE VACUUM HOSE CONNECTIONS AT THE EVAP CANISTER PURGE VALVE.IF ALL IS GOOD.THE EVAP CANISTER PURGE VALVE COULD BE BAD. CODE PO 442 - EVAPORATIVE EMISSION EVAP SYSTEM SMALL LEAK DETECTED. EVAPORATIVE EMISSION SYSTEM LARGE LEAK DETECTED FUEL CAP LOOSE OR OFF MISSING. CODE PO 446 - EVAPORATIVE EMISSION EVAP SYSTEM VENT CONTROL CIRCUIT MALFUNCTION.
Generally is the emission system warning, but to know excalty what fault code is stored there, I suggest scanned the PCM; with this fault code number could send additional details about diagnostic or solutions.
try to reset your computer by disconnecting the positive cable on battery for 5mins if lights go off @ they should, run get that sticker before the cops get you!!!!!!
take the ground line of the battery and press the brake for a few minutes and if the life is still on have the vehicle scann and clear code and have the emission components for the vehicle check
U need to get the electronic engine control system checked for trouble codes, the light is a warning that a fault has occurred in the electronic engine controls, it can be one of over 200 problems in the system turning the light on.
Change thermostat and temp sensor....do another drive cycle....Plug your scanner back in and see if all the monitors are finished their tests...If not find out which monitor is still running...
this light comes on only when there is an emission sensor malfunction. you need a code reader to find out why it came on, and only a scanner can turn it off . i strongly suggest you see a mechanic who is good with emission diagnostic skill.
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