what is the difference between engine code p0134 and p0135

Question

what is the difference between the pontiac code p0134 and p0135.. I replaced the bank one sensor after having a p0135 code and now am getting a p0134 code..what the heck??

Answer 1

P0134 Oxygen sensor no activity (bank 1 sensor 1)

P0135 Oxygen sensor heater sensor malfunction

For P0135 being the first having a heater circuit malfunction,is more than likely a bad 02 sensor, With a new 02 sensor, if you get P0134 you may have gotten a skewed 02 sensor, A exhaust leak or a exhaust restriction  at the 02 sensor will affect its operation,Also fuel presuure needs to be within specification

3.8 (vin K ) 53-59 ignition on engine off

3.8 (vin 1) 48 - 54 ignition of engine off