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2022
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MDX Base
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System DTC Diagnostics (P16E2 - P219A)
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DTC Troubleshooting
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DTC Troubleshooting: P2121 (3.5L Engine) (2025)
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PCM Inspection
PCM Inspection
Test Procedure
If the other inspection item(s) indicated a normal condition, then it is determined that the remaining PCM is the cause.
Results
There is a problem with the PCM.