P2195 - O2 Sensor Signal Biased/Stuck Lean - Bank 1, Sensor 1

Powertrain DTC Charts and Descriptions 4-125

Diagnostic Trouble Code (DTC) Charts and Descriptions

P2195 - O2 Sensor Signal Biased/Stuck Lean - Bank 1, Sensor 1 (Continued)

• Air leaks after the mass airflow (MAF) sensor (if equipped)

• Contaminated MAF sensor (if equipped)

• Vacuum leaks

• Positive crankcase ventilation (PCV) system is leaking

• Incorrectly seated engine oil dipstick

• Leaking gasket

• Camshaft timing

• Exhaust leaks before or near the universal HO2S11 (if equipped)

• Exhaust leaks before or near the HO2S11 (if equipped)

• Damaged universal HO2S11 (if equipped)

• Damaged HO2S11 (if equipped)

• Damaged PCM

Diagnostic Aids:

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test H.

P2196 - O2 Sensor Signal Biased/Stuck Rich - Bank 1, Sensor 1

Description: A heated oxygen sensor bank 1, sensor 1 (HO2S11) indicating rich at the end of a test is trying to correct for an

over rich condition. This DTC sets when the fuel control system no longer detects switching for a calibrated amount of time.

Possible Causes: • Water in the harness connector

• UO2SPC11 circuit open (if equipped)

• HO2S11 circuit open (if equipped)

• Corrosion

• Incorrect connections

• Excessive fuel pressure

• Leaking or contaminated fuel injectors

• EVAP purge valve stuck open

• Biased MAP sensor signal (if equipped)

• Incorrect learned ethanol content

• Contaminated MAF sensor (if equipped)

• Positive crankcase ventilation (PCV) system

• Contaminated oil

• Oil overfill

• Camshaft timing

• Damaged universal HO2S11 (if equipped)

• Damaged HO2S11 (if equipped)

• Damaged PCM

Diagnostic Aids:

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test H.

P2197 - O2 Sensor Signal Biased/Stuck Lean - Bank 2, Sensor 1

Description: A universal heated oxygen sensor bank 2, sensor 1 (HO2S21) indicating lean at the end of a test is trying to

correct for an over lean condition. This DTC sets when the fuel control system no longer detects switching for a calibrated amount of time.

Possible Causes: • Water in the harness connector

• UO2SPC21 circuit open

• Corrosion

• Incorrect connections

• Low fuel pressure or running out of fuel

• EVAP purge valve stuck open

• Biased MAP sensor signal

• Incorrect learned ethanol content

• Air leaks after the mass airflow (MAF) sensor (if equipped)

• Contaminated MAF sensor (if equipped)

• Vacuum leaks

• Positive crankcase ventilation (PCV) system is leaking

• Incorrectly seated engine oil dipstick

• Leaking gasket

• Camshaft timing

• Exhaust leaks before or near the universal HO2S21

2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015