 | Home > Puma (Tdci) > Fault Code P0340-24 (28) |
 
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| lightning Member Since: 23 Apr 2009 Location: High Peak, Derbyshire Posts: 3552  
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l had exactly the same fault with my Transit (TDCi)
I discovered three of the glow plugs were faulty. One was shorted and two were open circuit. l replaced them but it made no difference. There was no power to the glow plugs, the relay had burnt out. Check you've got power to the glow plugs on cold startup. |
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24th Oct 2025 7:49am |
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| andy63 Member Since: 30 Jun 2023 Location: north east Posts: 841
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As your code relates to a camshaft signal failure that would be a good place to start..
Checking power and ground to the sensor..if its like mine on a 2.2 it receives a 5v supply.. If they are good if you could check the signal..preferably with a scope.. That should give you an idea of what is going on with the camshaft sensor.. I have a trace of mine at tickover.. But you could watch yours at cranking and see what's going on.. One the engine starts the camshaft signal is redundant I believe.. That's what you should see ..( they red trace ) The blue is crank sensor and green is no1 injector..just as a reference..  Click image to enlarge |
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24th Oct 2025 10:03am |
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| HardCharger Member Since: 03 Mar 2013 Location: Manila Posts: 831  
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I'm going to try and replace the camshaft position sensor and go from there. Hopefully, this will fix it. Anyone know the size of the bolt holding the sensor to the block? Will be doing it myself as the truck is stuck in the garage at home and can't really go anywhere. Don't fancy spending any more than I should having it brought by flatbed to the mechanic for something I can do myself for free.
Out of curiosity, I may try to clean the sensor as I read somewhere here that a member did that and it seemed to cure his woes. How does one clean this sensor, MAF cleaner, brake cleaner, or other kind of cleaner? My glow plugs and the wires to them are all new. I also ordered a crankcase position sensor just in case that decides to wonk out next. No Better Friend, No Worse Enemy |
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29th Oct 2025 6:23am |
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| andy63 Member Since: 30 Jun 2023 Location: north east Posts: 841
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There isn't much to clean ..the sensor is encased in plastic and if your top end and oil are clean it should only have an oil coating over the plastic casing..actuated by a cam shaped disc that rotates with the camshaft.. a hall effect sensor..digital output as you can see in the picture I posted above..
Did you check the supply and ground.. I dont think the sensor can be reliably checked with just a multimeter, but the signal wire may produce a mean voltage output somewhere between 0 and 5volts with a meter..as I said a scope is the tool.. |
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29th Oct 2025 7:33am |
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| HardCharger Member Since: 03 Mar 2013 Location: Manila Posts: 831
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Thanks, andy63!
Replacement it is. Would anyone know the size of the bolt so I can borrow the appropriate socket? What kind of scope do you use? It seems to cover a lot of systems. Now just waiting for the part to show up on my doorstep. No Better Friend, No Worse Enemy |
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30th Oct 2025 8:06am |
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| andy63 Member Since: 30 Jun 2023 Location: north east Posts: 841
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I cant remember the type or size ..it could be allen bolt but I think M10 socket..
The scope will cover any situation or component that needs testing..in the same way as a multimeter👍 |
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30th Oct 2025 9:15am |
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