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Re: 1997 Audi A8 Will not start after disconnecting...
You may have a DBW (drive by wire) car. If so, reconnect the battery and then turn the key on (don't start the car though). Do this with the hood open. Turn the key and then see if you have a high-pitched whining hum from the engine bay. If so, that's likely the throttle body readjusting its position. This can make a big difference in driveability, and is worth a shot. If the 97 didn't have DBW, you won't harm anything in trying it out.
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P1000 code means the codes were cleared or the battery was disconnected
Powertrain Control Module (PCM) Reset
All OBDII scan tools support the powertrain control module (PCM) reset.
The PCM Reset allows the scan tool to command the PCM to clear all emission-related diagnostic information. When resetting the PCM, a DTC P1000 will be stored in the PCM until all the OBD II system monitors or components have been tested to satisfy a drive cycle, without any other faults occurring. For more information about a drive cycle, refer to Drive Cycles .
The following events occur when a PCM reset is performed:
Clears the number of Diagnostic Trouble Codes (DTCs).
Did you disconnect the battery while you changed the oil sensor? If not, disconnect your battery for a few minutes and re connect it again. This resets all sensors. When you change sensors and dont cut the power, it keeps the same codes as it had when it was last shut down. Hope this helps. Car may also run a bit rough while it is resetting itself.
put a obd2 comp on the car and clear the codes.
or goto auto zone and ask one of them to use there obd2 and clear the trouble codes for you for free.
you can try disconnecting the positve or negitive terminal on the battery and then going in the car and starting the car to drane all power from the system yes act like your going to start the car and hold the key on for about 2 or 3 seconds.then go get a glass of tea and then put battery back on and restart car.drink tea.