I just replace a o2 sensor in a 1999 xj8L and the ob2 keeps telling me still running test and wont clear it has a P1000 code and cant get smog there a way to re set the car computer?

 

I've moved your question from Jaguar Forums Feedback & Suggestion Center to X308 forum. Members here with the same model will be able to help.

P1000 is NOT and error code. It is a status warning that all OnBoard Monitoring Tests have not been completed since the last memory clear. You will ALWAYS see this or P1111 (all Onboard tests completed).

Look for information on 'Drive Cycles' to speed up the process for completing the OnBoard Monitoring Tests.

Graham

 

How do I do that also the coolant level low would that make me fail smog California

 

The ECM has to go through several start/ drive cycles before it completes internal checks and displays P1111. On newer models it can be complicated, but yours should not.
The low coolant level is not likely to cause failure, although I don't know California rules. However it may be an indication that you have a leak, which could lead to a serious problem.

With the engine cold remove the screw cap from the black plastic reservoir at the rear of the engine compartment and check the coolant level. It should be just below the fill neck. If it is low add some coolant, or just distilled water if you don't have any. The warning should go out.

Check the level for the next few days. If it goes down you need to look for a leak.

 

The test cycle should include several starts, then idle for a minute or two, then some gentle accelerations to about 45 mph, then hold that speed for a few miles, if you can. No thrashing about. I usually give it a few miles in the 50 mph range, too. Your tank should be between 35 - 75 % full for the evap test.

If your car is not passing the OBD test cycle after a hundred miles or so, you should get a code for the problem. I don't think it is guaranteed, but mine always has.

Your scanner should tell you which tests are not yet passed. That is the "Drive Cycle Readiness Status" function.

 

make sure you fill the reservoir tank almost to the top of the tank. Cooling system warning system is very sensitive to the coolant level.

Your low coolant message could be that the sensor in the coolant reservoir tank is stuck.
Use a some kind of plastic spoon to stirup the coolant in the reservoir tank.
Sometimes the sensor is stuck and not floating the reservoir tank.

Jim Lombardi

 

It will take a week of driving (around 200 miles) to clear out all the self diagnostic monitor codes, which you probably cannot wait. However, you can still take your car in for smog check. California allows two of those monitor codes to not clear and you will still pass smog check, assuming everything else is okay. Have the smog check technician check if you have two or less codes left before starting the test. That check should be free. This is based on my past experience with diagnostic monitor codes and California smog test.