P013B - O2 Sensor Slow Response - Lean To Rich Bank 1, Sensor 2

4-30 Powertrain DTC Charts and Descriptions

Diagnostic Trouble Code (DTC) Charts and Descriptions

P013B - O2 Sensor Slow Response - Lean To Rich Bank 1, Sensor 2

Description: During a deceleration fuel shut-off (DFSO) event, the PCM monitors how quickly the heated oxygen sensor

bank 1, sensor 2 (HO2S12) switches from lean to rich. The measured rate of the lean to rich switch is compared to a calibrated fault threshold value. The measured rate of the lean to rich switch is compared to a calibrated fault threshold value. This DTC sets when the measured value is slower than the threshold value.

Possible Causes: • Exhaust leaks before or near the HO2S12

• Damaged HO2S12

Diagnostic Aids: Check for leaks in the exhaust system.

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test DW.

P013C - O2 Sensor Slow Response - Rich To Lean (Bank 2, Sensor 2)

Description: The heated oxygen sensor monitor measures the response rate of the rear heated oxygen sensor (HO2S) to a

rich to lean transition. This DTC sets when the measured response rate is slower than the threshold value.

Possible Causes: • Exhaust leaks before or near the HO2S22

Diagnostic Aids: This monitor is highly sensitive to exhaust leaks near the rear HO2S. Check for leaks in the exhaust system.

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test DW.

P013E - Sensor Delayed Response - Rich To Lean (Bank 1, Sensor 2)

Description: During a deceleration fuel shut-off (DFSO) event, the PCM monitors the heated oxygen sensor bank 1, sensor 2

(HO2S12) signal to determine if the signal is stuck in range. The PCM expects the signal to exceed a calibrated rich or lean value within a calibrated amount of time. If the signal voltage remains less than the rich value after a number of occurrences, the PCM intrusively controls the fuel system rich over increasing time periods in an attempt to force the signal to greater than the calibrated rich value. This DTC sets when, after three consecutive intrusive attempts, the signal cannot be forced greater than the calibrated rich value. Also, if the signal voltage remains greater than the lean value after a calibrated amount of time with the fuel injectors off, a counter is incremented. This DTC sets when after three consecutive occurrences the signal is not less than the calibrated lean value.

Possible Causes: • Exhaust leaks before or near the HO2S12

• Aftermarket exhaust accessories or performance modifications

• Ethanol content in the fuel

• HO2S12 circuit intermittent

• Damaged HO2S12

Diagnostic Aids: Check for leaks in the exhaust system. Check for an intermittent HO2S12 signal.

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test DW.

P0140 - O2 Circuit No Activity Detected (Bank 1, Sensor 2)

Description: If the sensor signal value is not changing from the default value, the PCM commands an oscillating air to fuel

ratio attempting to detect some movement in the signal value. This DTC sets when the PCM is unable to detect movement in the sensor signal while the air to fuel ratio is oscillating.

Possible Causes: • HO2S12 circuit open

• Damaged heated oxygen sensor bank 1, sensor 2 (HO2S12)

Diagnostic Aids: An O2S12 PID switching across 0.45 volt from 0.2 to 0.9 volts indicates a normal switching HO2S.

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test DW.

P0141 - O2 Heater Circuit (Bank 1, Sensor 2)

Description: This DTC sets when an open or short circuit is detected or the heated oxygen sensor bank 1, sensor 2

(HO2S12) heater current draw exceeds a calibrated limit.

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