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Hi all,

First time caller, long time listener.Big fan of the show etc etc

Mate has an Altez`

Engine light on and slightly down on power.

Bringing up fault code P1656 OCV Fault

Is this a common problem, whats the common cause and possible remedies?!!

Cheers for your help!


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Often is the case with getting fault codes, they send you on a wild goose chase!



VVT signal

[OCV+, OCV-]

Poor output when driving high


· Wiring and connector (oil control valve)

· Oil control valve

· Engine control computer

· +B2 voltage check

Something to do with the VVTi system..

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