P0141 P0300 Hyundai -

Question

Hello

I have a Hyundai elantra 2001 1.6 79 kw.Works very good except i had a check engine light for couple of months.Winter came and in the morning i lose power and car is not responsive on gas but only on a cold engine and it lasts for couple of minutes until engine is not warm than its normal.Check light flashes for couple of seconds then its only on.I have 5 codes p0141 P0141 P0300 P0301 P0302. i Changed the spark plugs.Is it possible that both o2 sensors are faulty.Engine gases are ok,Thank you for your answer

Answer 1

HI there,

The codes P0300, P0301 and P0302 are all misfire codes. Cylinder #1 and #2 are misfiring, this is likely due to a fault ignition coil.

P0141 Is a code for the heater circuit for the rear O2 sensor AFTER the catalytic converter. It's likely you only need that rear sensor to resolve this code.