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Unread 02-17-2013, 06:13 PM   #1
eecer
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1997 ZJ 
 
Join Date: Sep 2012
Posts: 3
P0340 on 1997 Laredo 5.2L

So ive been getting the error code P0340 which I thought just meant replace the crankshaft sensor, did that and the error came back. Looked into the code reading more and I found this:

P0340 - Generic
Type:
-Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
-Camshaft Position Sensor "A" Circuit
Location:
-Bank 1 or Single Sensor

P0340 - Chrysler
Type:
-Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
-No Camshaft Synch Signal To PCM Conditions
Cause:
-Engine cranking with 32 CKP sensor pulses received, then the test started and the PCM did not detect any CMP sensor pulses for 2 seconds.

I then looked around and have found three different answers to the camshaft sensor problem, 1. there is no camshaft sensor, 2. the camshaft sensor is in the distributor, 3. the camshaft sensor is built into the ignition plate in the distributor.

Has anyone had this problem before and knows how to fix it? Ive been searching all over and have yet to find anything that says exactly where the sensor is or if theres something else I need to check for this problem. Any help would be great.

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Unread 02-17-2013, 07:40 PM   #2
dusterdude
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1996 ZJ 
 
Join Date: Jan 2012
Location: hopewell, va
Posts: 2,044
The cam sensor is under the distributor cap,its the plate looking thing with wires coming out of it
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Unread 02-17-2013, 09:04 PM   #3
PolkaPower
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1998 ZJ 
 
Join Date: Aug 2011
Location: The Abyss, Italy
Posts: 16,372
Here is a pic of it. To replace it you take the cap and rotor off then unplug the sensor and replace. It's really easy. Buy a Mopar sensor don't go cheap.
picture-17.png  
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Unread 02-18-2013, 01:35 PM   #4
eecer
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1997 ZJ 
 
Join Date: Sep 2012
Posts: 3
Oh so the ignition Plate is the cam sensor too. Lol thats very odd. Thanks for the help!
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Unread 02-19-2013, 02:44 AM   #5
eecer
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1997 ZJ 
 
Join Date: Sep 2012
Posts: 3
Quote:
Originally Posted by PolkaPower View Post
Here is a pic of it. To replace it you take the cap and rotor off then unplug the sensor and replace. It's really easy. Buy a Mopar sensor don't go cheap.
The diagram really helps but I cant find a way to remove the rotar. Do I have to remove the distributor to take it out?
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Unread 02-19-2013, 06:28 AM   #6
Mlarv
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2014 JK Wrangler 
 
Join Date: Jan 2013
Location: Kent, OH
Posts: 291
Quote:
Originally Posted by eecer View Post
The diagram really helps but I cant find a way to remove the rotar. Do I have to remove the distributor to take it out?
If your rotor is stuck on the best way I have found to remove it is with a pair of channel locks. I put the open jaw on the plate and use them to wedge the rotor button up you might have to go on either side if it to start it but this normally works for me. When you replace the rotor put a little lube or anti seize on the inside of it.

Good Luck
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What Would Scooby Do?
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Unread 02-19-2013, 07:09 AM   #7
PolkaPower
Registered User
1998 ZJ 
 
Join Date: Aug 2011
Location: The Abyss, Italy
Posts: 16,372
I jst yanked mine straight up and it came flying off. I hit my hand pretty good on the firewall.
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Unread 02-19-2013, 07:11 AM   #8
KoreaZJ
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1994 ZJ 
 
Join Date: Aug 2011
Location: GANGNAM STYLE
Posts: 2,666
Quote:
Originally Posted by eecer View Post
Do I have to remove the distributor to take it out?
Nope. Only 93 to early 94 4.0L need to remove the distributor and shaft to access the camshaft sensor.
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