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Fault code- what does it mean

6K views 11 replies 6 participants last post by  Tim. 
#1 ·
P0340- Camshaft Position Sensor A -Bank 1 Circuit Malfunction.

Do you reckon its a case of juts sticking in a new sensor or is it to do with its conenction to ECU etc?



Mmm, now I can see the problem with not having a "general" technical page as this fault is no doubt common amonst all cars.
 
#2 ·
Broon said:
P0340- Camshaft Position Sensor A -Bank 1 Circuit Malfunction.

Do you reckon its a case of juts sticking in a new sensor or is it to do with its conenction to ECU etc?



Mmm, now I can see the problem with not having a "general" technical page as this fault is no doubt common amonst all cars.
Can't help Broon - but we do still have a Otheres TechPage - for anything that isn't too specific.
 
#4 ·
this help at all broon - not my words i might add

"

> Does anyone know the specific intrepretation of diagnostic code 0340. I do
> know that it has something to do with a cyclinder misfiring, but what I'm
> not sure of, is does that mean that there's a bad coil, fuel injector,
> spark plug, or valve? Also, how do I test for problems with either of
> these components?
> This code is for a 1995 Toyota Avalon.



Code P0340 means camshaft position sensor circuit malfunction


The diagnostic code P0304 means that a misfire was detected in Cylinder 4.
Since you ask about misfiring, I'm assuming the 0340 in the text body was a
typo and the 0304 in the subject is correct.

When the DTC says that a misfire was detected in cylinder 4, and the check
engine light is on, it means that the system detected at least 1 misfire per
1,000 engine revolutions. If the check engine light is flashing then it
detected at least 1 misfire per 200 engine revolutions and you need to get
the condition resolved soon before it ruins your catalytic converter.
The DTC does not give you the cause of the condition - it only gives a
condition. A cylinder misfire can be caused by a problem with the things
you mentioned as well as ignition timing, the wiring between the components
you listed and the ECU, and the ECU itself. Rather than taking wild guesses
and replacing parts, the smart thing to do would be to check the components.
If a spark is intermittent, proper equipment like an oscilloscope is needed
to diagnose.
--



"

timing belt out mate i think - general consensus online...... get it checked out!!!! woo!!
 
#5 ·
Thanks mate,.

but that code is for 0304 not 0340. Mine is definitaley 0340 - camshaft sensor.

I ahve to admit I did have a 0304 misfire code after HGF (or indeed just before as that was when my MIL came on) but it was cleared and has not returned.

If timing was out though, would my power loss be intermittent or would it be there all the time. I can have days when things are fine.


(just trying to find a cheaper option than having timing done :lol:)
 
#10 ·
Stupidly I googled the whole fault in inverted commas and got lots of hits from american car sites etc, but no real solution of what to do.

Cheers Sprinter, I am just going to pass the evil lair (sorry ex-MGR garage) just now.

Update: I did pass it and eventually they decided they did not have one but ti will cost 65 pounds.

Need to make sure it is going to work before spending that.
 
#11 ·
P0340- Camshaft Position Sensor A -Bank 1 Circuit Malfunction.

Do you reckon its a case of juts sticking in a new sensor or is it to do with its conenction to ECU etc?



Mmm, now I can see the problem with not having a "general" technical page as this fault is no doubt common amonst all cars.
I actually googled it too! wow man. though it happened to know that I dont have a clear idea about the standard one.. so that makes sense to me.. so how was it?
 
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