![]() The reason for this is that the ECU does a Heater circuit and Sensor circuit test on start-up and if either fails it will cause a DTC. ![]() When the engine is turned off switch back to OEM NB02 signal. After the key is on, but before the car is started switch the rocker to simulated. Run the simulated NB02 signal line and the (B) OEM NB02 signal to a rocker switch and out to the ECU Leave the stock O2 connected also, but zip tied off somewhere to prevent DTCs. Splice into Casper's harness (instead of the OEM harness or O2 cables) to get the (D) 12V+ switched power and (C) ground lines for the WB02 controller. I installed mine in the stock O2 bung and used the simulated O2 signal for the NB02.Ĭasper's has an O2 extension cable that comes with a male and female connector for the O2 sensor you can purchase to piggy back your power with.
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