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Dec 30th, 2023
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 Problem with 2003 Dodge Ram
#2329272
06/03/08 03:55 PM
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Joined: Jan 2005
Posts: 181
BJG1969
OP
Outdoorsman
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OP
Outdoorsman
Joined: Jan 2005
Posts: 181 |
2003 Dodge Ram.
Cranks but will not start. Trouble code is P0320 (Crank Sensor).
The sensor was replaced, but did not fix the problem. The information I have is pointing to the ECM, but it is expensive. Are there any Dodge mechanics that know of this problem?
What tests can I do to be certain it is the ECM?
in other words.....HELP!!!!
Thanks,
Billy
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Re: Problem with 2003 Dodge Ram
[Re: BJG1969]
#2329275
06/03/08 03:56 PM
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Joined: Jan 2005
Posts: 181
BJG1969
OP
Outdoorsman
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OP
Outdoorsman
Joined: Jan 2005
Posts: 181 |
I guess I should have stated that it is a 3.7 V6 with autmatic trans.
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Re: Problem with 2003 Dodge Ram
[Re: BJG1969]
#2329742
06/03/08 05:57 PM
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Joined: Feb 2003
Posts: 55,499
SkeeterRonnie
Super Freak
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Super Freak
Joined: Feb 2003
Posts: 55,499 |
go bang on the PCM with something hard(dont break it- just ap it a few times).... if it starts- you know where the problem is....
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Re: Problem with 2003 Dodge Ram
[Re: SkeeterRonnie]
#2330504
06/03/08 10:28 PM
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Joined: Mar 2006
Posts: 13,424
Poorboy
TFF Guru
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TFF Guru
Joined: Mar 2006
Posts: 13,424 |
go bang on the PCM with something hard(dont break it- just ap it a few times).... if it starts- you know where the problem is.... You must me ASE certified 
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Re: Problem with 2003 Dodge Ram
[Re: Poorboy]
#2340592
06/06/08 02:44 PM
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Joined: Nov 2007
Posts: 1,515
J-SPENCER
Extreme Angler
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Extreme Angler
Joined: Nov 2007
Posts: 1,515 |
Try checking the cam sensor signal
P0320- NO CRANK REFERENCE SIGNAL AT PCM
When monitored: with engine on
Set Condition: No signal from the Crankshaft Position Sensor is present during engine cranking, and at least 3 Camshaft Position Sensor signals have occurred.
POSSIBLE CAUSES:
1. CAM POSITION SENSOR SIGNAL
2 5 VOLT SUPPLY SHORTED OR OPEN
3. CKP SENSOR SHORTED OR OPEN OR SHORTED TO 5V REF.
4. SENSOR GROUND OPEN
5. PCM
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