DTC P1646:00, P1647:00 [MZI-3.7]
id0102d2328300
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DTC P1646:00 DTC P1647:00 |
A/F sensor (RH) control chip A/F sensor (LH) control chip |
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DETECTION CONDITION
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• P1646:00 indicates the A/F sensor (RH) control chip.
• P1647:00 indicates the A/F sensor (LH) control chip.
• The PCM monitors the application-specific integrated circuit that controls and monitors the HO2S. The test fails when the PCM detects an internal circuit or communication concern.
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POSSIBLE CAUSE
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• PCM malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
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Yes
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Go to the next step.
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No
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Record FREEZE FRAME DATA on the repair order, then go to the next step.
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2
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
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No
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Perform PCM reprograming using the M-MDS, then go to the next step.
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3
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VERIFY TROUBLESHOOTING OF DTC P1646:00, P1647:00 HAVE BEEN COMPLETED
• Verify that all disconnected connectors are reconnected.
• Clear the DTC from the PCM memory using the M-MDS.
• Perform the KOEO or KOER self-test.
• Is the PENDING CODE for this DTC present?
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Yes
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Replace the PCM, then go to the next step.
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No
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Go to the next step.
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4
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VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.7].)
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No
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Troubleshooting completed.
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