Alfa 156 1.8TS Camshaft Sensor Fault - Dilemma!? - Alfa Romeo Forum
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Alfa 156 1.8TS Camshaft Sensor Fault - Dilemma!?

I drive a 2002 Alfa 156 1.8 TS (91000 miles) and I have had a 'Motor Control System Failure' message for the last two days - and the engine has been operating in 'limp home'. I have had the engine diagnostically test, with the following result:

P0340 Camshaft Position Sensor A Circuit (Bank 1 or single sensor)... P0340

I understand that that removal of the cambelt would be required in order to replace the sensor. The cambelt was last replaced at 69,500 miles.

The garage has 'suggested' that I also replace the cambelt, water pump and variator at the same time.

I am sure this question has been asked before, but I am interested to hear what the general consensus/recommendation on here would be?? What are your experience on the reliability of these parts?

Many thanks
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Yes the belt has to be removed, as the sensor sits behind and 'reads' the exhaust camwheel which has to be removed also. Up to you whether to replace everything. I''ve taken belts off and put em back on without issue, although some believe if the belt is disturbed it should be replaced. Can't remember in miles what the recommended mileage for the belt is but at 30k miles yours might be due. I'd only replace the variator if it was noisy. Don't need to fix something if it isn't broken. The historical Cambelt issues were caused in large part by the original crappy plastic tensioner that collapsed. The current part is much more reliable. Having had a belt change it is highly unlikely you'd have the old tensioner. While the all the things the mechanic is offering you are good things, remember is trying to maximize his bill.

Darryl in New Zealand

Last edited by KiwiAlfa156; 20-09-12 at 03:04. Reason: grammar
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36,000 is the change interval for the belt. Only change the variator if its noisy on start up. I personally wouldn't re use a 20,000 mile old cambelt and while you've got it in bits it'd be a false economy not to change the tensioner as well. Waterpump is probably a good idea at that mileage if its never been done before.
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I've answered this in your other identical thread......please don't double just clutters the forum up unnecessarily
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