Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Manifold Pressure/Vacuum Sensor: Testing and Inspection

Diagnostic Trouble Code (DTC) DTC 33 or DTC 34 indicates a failure in the Manifold Absolute Pressure (MAP) sensor circuit. Also refer to MAP Output Check Diagnosis to check the MAP sensor if there is no DTC. Refer to Diagnostic Trouble Code Charts. Under Computer and Controls/System Diagnosis/Procedures. Testing and Inspection