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1998 Hyundai Elantra Questions & Answers
98 Hyundai Elantra P0301
Hello WHAT THE HECK HAPPENED ! When power is disconnected from the vehicles on board computers, they reset themselves to factory standards. To have all system monitors reset themselves... a standard driving procedure has to be followed. Please see the link for a Accent model to give you an idea of what to do. If you can't find the exact procedure for your vehicle, the link for the Accent model should work for your Elantra.PS: Check to make sure the spark plugs leads went to the correct cylinder. Are you showing any Service Engine idicators on the dash?
How to Complete Hyundai Accent Drive Cycle
How do i set the co2 level
CO2 levels are set by the ECM program. If the HO2S and O2 sensors are working properly then that information is relayed to the ECM ,checked against the CPU program and the air/fuel mixture/timing is adjusted by the ECM to rectify the readings. Run the fault codes to see if there is a sensor problem
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