Well, I got to use my new code reader today :(

[Huskymaniac]

Originally Posted by TomsSVX

You can see the trim numbers for bank #1 are high but less than 10% which is not all bad. Try to track down the service records for which sensor was replaced

Tom

After a rainy day yesterday, the O2 code was back. Was the rainy day a coincidence? Maybe. Here is the report:

Stored:
P0133 O2 Circuit Slow Response (Bank 1, Sensor 1)

Pending:
P0133 O2 Circuit Slow Response (Bank 1, Sensor 1)


MIL ON
Misfire Monitoring Complete
Fuel System Monitoring Complete
Comprehensive Component Monitoring Complete
Catalyst Monitoring Complete
Heated Catalyst Monitoring Not Supported
Evaporative System Monitoring Not Supported
Secondary Air System Monitoring Not Supported
A/C System Refrigerant Monitoring Not Supported
Oxygen Sensor Monitoring Not Complete
Oxygen Sensor Heater Monitoring Not Complete
EGR System Monitor Not Complete

DTC for which Freeze Frame was Stored P0133
Fuel System 1 Status Closed Loop
Fuel System 2 Status Closed Loop
Calculated LOAD Value 17.65 %
Engine Coolant Temp 87 °C (188.6F)
Short Term Fuel Trim - Bank 1 -2.34 %
Long Term Fuel Trim - Bank 1 11.72 %
Short Term Fuel Trim - Bank 2 0.78 %
Long Term Fuel Trim - Bank 2 2.34 %
Intake Manifold Absolute Pressure 53 kPa (7.687 psi)
Engine RPM 2487 rpm
Vehicle Speed Sensor 76 km/h (47.22 MPH)

So it looks like the long term trim is now greater than 10%. What is the difference in meaning between the long term trim and the short term trim and how does the ECU use them? Does a positive number mean extra fuel in the mix or extra air?

The previous owner has been unable to track down which sensor was replaced previously. So I will have my mechanic check for a corroded or bad connection and replace the sensor if the connection looks OK.

Exactly which sensor is Bank 1, sensor 1? And what does it mean when it says there is a slow response?