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Avensis Gen1 '02 OBD P1203


B3rtie
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Good evening.

Please could someone advise what this code relates to P1203 VSC and DTC lights are on - 'ECU communication faulty'

Thanks

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The following info is from gen 2 avensis repair manual, but i guess the overall info is the same exept wiring diagram!

Screenshot_20170109-084838.pngScreenshot_20170109-084838.png

Screenshot_20170109-084901.png

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Is the Code P1203 or C1203 as ents has replied as 

P1203 is a cylinder # 3 misfire

C1203 is a electrical communication error

 

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Yes my mistake C1203.

On this car codes P030x' are cylinder misfires.

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Thanks for the replies I shall look into it.

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