Dreaded P0340 HELP!!
Cargo Master
Joined: May 2004
Posts: 3,007
Likes: 5
My book, Powertrain Control/Emissions Diagnosis Service Manual, lists as a troubleshooting step for DTC P0340, does the engine start?
If yes, continue
If No, then trouble code P0340 is not the cause of no engine start, fix that first.
If yes, continuing, clear the trouble codes and attempt to regenerate the DTC.
If yes, continue
If No, then trouble code P0340 is not the cause of no engine start, fix that first.
If yes, continuing, clear the trouble codes and attempt to regenerate the DTC.
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New User
Joined: Aug 2015
Posts: 15
Likes: 0
I do not see a brand name on it? 200 volt ac is the smallest one on this multimeter and with a drill it shows about a .3 oh and just realized I was using that 200 setting to test the output on the sensor...but it should read something correct? All I get is 0.00
Oreilly here has a BWD brand...$39.99. motorcraft is $98...but not in stock
Oreilly here has a BWD brand...$39.99. motorcraft is $98...but not in stock
Thread Starter
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New User
Joined: Aug 2015
Posts: 15
Likes: 0
My book, Powertrain Control/Emissions Diagnosis Service Manual, lists as a troubleshooting step for DTC P0340, does the engine start?
If yes, continue
If No, then trouble code P0340 is not the cause of no engine start, fix that first.
If yes, continuing, clear the trouble codes and attempt to regenerate the DTC.
If yes, continue
If No, then trouble code P0340 is not the cause of no engine start, fix that first.
If yes, continuing, clear the trouble codes and attempt to regenerate the DTC.
Cargo Master
Joined: May 2004
Posts: 3,007
Likes: 5
If it's not a short circuit
Then the CMP sensor might be installed incorrectly
Or the CMP sensor might be faulty
Or the PCM is faulty, but that rarely happens.
So check the CMP sensor installation, or try another CMP sensor.
Then the CMP sensor might be installed incorrectly
Or the CMP sensor might be faulty
Or the PCM is faulty, but that rarely happens.
So check the CMP sensor installation, or try another CMP sensor.
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New User
Joined: Aug 2015
Posts: 15
Likes: 0
Thanks I guess I wasn't aware it could be installed incorrectly as it seems pretty straight forward. I will probably try another sensor...as I can always return it if it does not solve the problem..thanks!
Moderator
Joined: Jan 2004
Posts: 13,851
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From: SW Va
On the 200 VAC scale, is it two digits on the meter after the decimal???
If you don't want to spring for a new sensor, you could try the salvage yard for a Motorcraft & see how it goes. The new BWD should be ok for quality as its BorgWarner, so most of their after market parts are ok. Again Don't opt for a Dorman if offered.
If you don't want to spring for a new sensor, you could try the salvage yard for a Motorcraft & see how it goes. The new BWD should be ok for quality as its BorgWarner, so most of their after market parts are ok. Again Don't opt for a Dorman if offered.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
With the new no name cam sensor having continuity & its output reading what seems to be .3volts AC with the drill motor close to it, makes me wonder if when installed it has the necessary reach, so that it gets properly triggered????
If you have the old sensor compare the two for reach & perform a continuity & drill motor test on the old cam sensor.
If you have the old sensor compare the two for reach & perform a continuity & drill motor test on the old cam sensor.
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New User
Joined: Aug 2015
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I installed the new sensor and no change. I did get it started for 30 seconds or so and climbed under to listen for marbles. I so believe that is what I am hearing...ugh
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Moderator
Joined: Jan 2004
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From: SW Va
Ok, on the marble noise, if its up front around the cam chain might suggest a faulty chain tensioner cassette, as it a common problem part on that model engine, so if noisy, it belongs on your suspect list.
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New User
Joined: Aug 2015
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Just got word back from the shop. Broken left side timing chain. With the miles it has on it and the body being in such good shape we are going to replace the motor. What years are compatible with this truck?
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Call your local trusted salvage yard for compatible year engines. Be mindful of emission systems & accessories, or transfer the needed systems from the old engine to the replacement to keep the computers/controllers happy, but the salvage yard should be able to look in their books to keep you out of trouble on that aspect. Don't think I've ever heard of a chain breaking, must be an oiling problem on the chain, so be sure all is well there on the replacement engine, lest it meet the same fate.
More thoughts for pondering, let us know how it goes.
More thoughts for pondering, let us know how it goes.
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