With the engine running check fuses #32, 33 and 34 for voltage into and out if the fuse see attached link
http://www.expeditionforum.com/threads/fuse-testing-101.24587/
P2195 - Lack of HO2S-11 Switch, Sensor Indicates Lean
A Heated Oxygen (HO2S) sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.
- Electrical:
- Short to VPWR in the harness or HO2S.
- Water in the harness connector.
- Open/shorted HO2S circuit.
- Corrosion or poor mating terminals and wiring.
- Damaged HO2S.
- Damaged PCM.
- Fuel System:
- Excessive fuel pressure.
- Leaking/contaminated fuel injectors.
- Leaking fuel pressure regulator.
- Low fuel pressure or running out of fuel.
- Vapor recovery system.
- Induction System:
- Air leaks after the MAF.
- Vacuum Leaks.
- PCV system.
- Improperly seated engine oil dipstick.
- EGR System:
- Leaking gasket.
- Stuck EGR valve.
- Leaking diaphragm or EVR.
- Base Engine:
- Oil overfill.
- Cam Timing.
- Cylinder compression.
- Exhaust leaks before or near the HO2S(s).
P2196 - Lack of HO2S-11 Switch, Sensor Indicates Rich
A Heated Oxygen (HO2S) sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time. See the possible causes for DTC P2195.
P2197 - Lack of HO2S-21 Switch, Sensor Indicates Lean
A Heated Oxygen (HO2S) sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time. See the possible causes for DTC P2195.
P2198 - Lack of HO2S-21 Switch, Sensor Indicates Rich
A Heated Oxygen (HO2S) sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time. See the possible causes for DTC P2195.
P0132 - HO2S Sensor Circuit High Voltage (HO2S-11)
The HO2S signals are monitored for an over voltage fault. The code is set when the HO2S signal voltage is 1.5 volts or greater.
- HO2S Signal Circuit shorted to Heater Power inside of HO2S sensor.
- HO2S Signal Circuit shorted to VPWR or VREF in harness.
- PCM failure.
An HO2S PID switching across 0.45 volt from 0.2 to 0.9 volt indicates a normal switching HO2S. An HO2S PID voltage of 1.5 volts or greater indicates a short to power.
P0152 - HO2S Sensor Circuit High Voltage (HO2S-21)
See the description for DTC P0132. See the possible causes for DTC P0132. See the diagnostic aids for DTC P0132.