986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Day Three of owning a 2000 S, first CEL

blue62 · 11-26-2019, 01:53 PM

That code is telling you that there is a fault with the pre cat O2 sensor's internal heater or the wiring circuit (for the o2 sensors heater) from the DME to the sensor. On bank 2
You can test the wiring to the sensor with a volt meter.
Look at the wiring at the sensor side of the wiring connector. If it is a 4 wire sensor (I think it is but not positve) 2 of those wires should be the same color. those are the heater circuit wires.
One is the ground
The other is the positive
If your wiring is ok then the sensor is kaput.
Could be a fault with the DME but that is not very likely

11-26-2019, 01:53 PM	#2
blue62 Registered User Join Date: Aug 2018 Location: Woodland Wa Posts: 1,309	That code is telling you that there is a fault with the pre cat O2 sensor's internal heater or the wiring circuit (for the o2 sensors heater) from the DME to the sensor. On bank 2 You can test the wiring to the sensor with a volt meter. Look at the wiring at the sensor side of the wiring connector. If it is a 4 wire sensor (I think it is but not positve) 2 of those wires should be the same color. those are the heater circuit wires. One is the ground The other is the positive If your wiring is ok then the sensor is kaput. Could be a fault with the DME but that is not very likely Last edited by blue62; 11-26-2019 at 02:44 PM.