I just replaced the inlet and outlet o2 sensors on a 2004 pt cruiser and the check engine light still stays on?
May 23, 2010 by chec
Filed under Engine sensors
When I personally changed the o2 sensors, I still get the same error code that the o2 sensors are bad, but they are brand new and the check engine light stays on. I even tried to remove the battery terminals and then put them back on to reset and still nothing. What do I do?
Go to Autozone and borrow their code reader and clear the code.
Also can look up the reset procedure for your car on the internet…usually a set series on turning the ignition and stepping on the gas pedal.
you have to go to the dealer and get them to clear the code from the computer.
OBDII computer systems require the use of a scan tool to clear failure codes. Disconnecting the battery will not clear failure codes, pumping the gas pedal will not clear the failure codes. Only a scanner can do it.
Note if the problem has not been fixed the codes will reset .
What is the code? It might not be the O2 Sensors. There is no dtc that says “O2 sensor bad, replace it” You could have a wiring issue or even a PCM issue. There are many things that set off O2 Sensor DTCs. Send me the DTC and I can try to help with the diagnosis.
well you must now need a real technician