DTC P164A:00 [MZI-3.7]: Notes
WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSE
| DTC P164A:00 |
A/F sensor (RH) positive current trim circuit performance |
| DETECTION CONDITION |
- A resistor is installed in the A/F sensor (RH) connector for part to part variance. The PCM determines the value of this resistor by taking multiple measurements of the resistor during each key on event. The PCM uses this value in order to compensate for the variance in the pumping current signal The test fails if the PCM receives an inconsistent or erratic measurement of the resistor.
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| POSSIBLE CAUSE |
- Connector or terminal malfunction
- A/F sensor (RH) malfunction
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 Courtesy of MAZDA MOTORS CORP.
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