I have a 2000 bi-fuel Cavalier that has been running great both on natural gas and regular gas until this past Friday. The check engine light came on, but the car still ran fine. It was running on regular gas since it was out of NG. I took it to a parts store that was nearby and they read the code on it which was P1215. They told me I needed to replace the computer, but the guy there didn't sound that confident. Someone else there told me to just unplug the battery and it would reboot the computer. After doing this the light went off for about two days and it seemed to run fine. Then my wife was driving the car and it started running rough and died on the side of the road, with the check engine light on again. I disconnected the battery for awhile, connected it again and it started up and I drove it home. Now the light comes right on and stays on after clearing the codes. I tried pulling the 20 AMP fuse to disable the NG to see if it might be trying to run on NG and it still runs the same and I still het the P1215 code. Any ideas of what to check or what this problem might be would be appreciated. The reader I am using says this code is Manufacturer Control Fuel Air Monitoring, but the Chevy site says it is a Ground Fault, but no more details.
Thanks.
Thanks.
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