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fault code 21 .test for primary signal to ECU

my engine dos not start and the fault reader and the ECU are giving fault cod 21 primary ignition signal

and remedy

test for primary signal to ECU

this is chinese to me can sambody please telme wer to start

PS do not lock at rigting mestaqes :headvswal

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    Code 21 - Wiring Harness or Connector to the Power Transistor Unit (PTU) has failed.

     

    Not sure, but it could also mean that the PTU has failed?

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    where is it located and haw dos it look i do have a lot of electrical stuf

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    where is it located and haw dos it look i do have a lot of electrical stuf

     

    A Black box about the size of a Cigarette Packet bolted to the front of the LEft hand Cam cover.

     

    Location is Circled in red :

    attachment.php?attachmentid=14901&stc=1

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    Seem to remember you swapped PTUs when i

    was there the other day Rob.Must be harness.

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    ok nead to look at the whiring again

    tanks

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