P164B - O2 Sensor Positive Current Trim Circuit Performance (Bank 2 Sensor 1)
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DTC DESCRIPTION P164B - O2 SENSOR POSITIVE CURRENT TRIM CIRCUIT PERFORMANCE (BANK 2 SENSOR 1)
| Description: | A resistor is installed in the universal heated oxygen sensor bank 2, sensor 1 (HO2S21) connector for part to part variance. The PCM determines the value of this resistor by taking multiple measurements of the resistor during each ignition ON event. The PCM uses this value to compensate for the variance in the pumping current signal. This DTC sets when the PCM receives an inconsistent or erratic measurement of the resistor. | ||
| Possible Causes: |
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| Diagnostic Aids: | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to Pinpoint Test DZ. | ||