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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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PCV Monitoring



PCV Monitoring

OBD Exemption:
The systems are designed so that the connectors are fastened in such a manner that they are very difficult to dissemble. Most of the connections of the PCV systems can be reached only if the engine is disassembled.

All lines and connectors are resistant against ageing.

Disconnection between the PCV valve and the intake manifold may cause the vehicle to stall immediately during idle operation or to detect a trouble code either for air/fuel adaptation or misfire. In other cases there will be a noticeable loss of oil.