Here are the codes I have:

P0133
Definition.
Slow response (heated oxygen sensor bank 1 sensor 1)

P0130
Definition.
11 circuit condition (heated oxygen sensor bank 1 sensor 1)
(Possible misfire)

P0128
Definition.
Coolant Temp is always low


I think I have a bad sensor in bank 1 and a bad coolant temp sensor, is this correct? I will try to do a tuneup because I think a misfire could cause the car to run rich and foul out the sensors.


Thanks
Mike

 

Did you just install headers or did this come out of the blue???

I have heard of people having "switching" problems with O2 sensors after a header install most notably with the Bosch sensors (although that's what I run and have had no trouble)...

 

Replace the drivers side upstream oxygen sensor. That should take care of the P0133. P0130 is an invalid dtc. P0135 is for the bank 1 upstream oxygen sensor heater circuit. A new sensor should fix that as well. The lack of switch is due to prolonged heating time for the oxygen sensor. Long tube headers make this problem more common, but so does a failed oxygen sensor heater.

The P0128 means that the ECT is reading a temperature during closed loop operation that is lower than the thermostat regulating temperature. You probably have a thermostat sticking partially open due debris.