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Found a thread with a result for these codes, will check the wiring and earths and look at replacing the crank sensor. Have to put a new fan on anyway as the old one is cracked, so they can be done at the same time.

Code 0702 and 0407 Thanks Tweak'e. After a lot of searching and trying I have extracted the codes. Have got the codes 0702 and 0407 which are for the crankshaft position sensor circuit sensor or ECM failure, and for an incorrect signal from the injection pump control unit. I will check these...

Have a 2004 D22 with ZD30. Has started running very badly, often but not always no power, idles badly in that engine keeps revving as if I was blipping the throttle, but the rev counter is reading about double the revs that the engine is at. Vehicle is high mileage (400,000) and used for heavy...