P0153 - O2 Circuit Slow Response (Bank 2, Sensor 1) - DTC Chart

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2015 Lincoln Navigator, 2015 Lincoln MKZ, 2015 Lincoln MKX, 2015 Lincoln MKT, and 2015 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.

P0153 - O2 CIRCUIT SLOW RESPONSE (BANK 2, SENSOR 1) - DTC CHART

Description: The PCM monitors the universal heated oxygen sensor bank 2, sensor 1 (HO2S21) response time by commanding a calibrated fuel control routine. This routine sets the air to fuel ratio to a calibrated limit to produce a predictable oxygen sensor signal amplitude. This DTC sets when the oxygen sensor signal does not reach the predicted amplitude within a predetermined response time.
Possible Causes: Exhaust leaks Incorrect fueling Intake air system leaks Mass airflow (MAF) sensor (if equipped) Contaminated universal HO2S21 Deteriorating universal HO2S21
Diagnostic Aids:
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to Pinpoint Test DZ .