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2004 6.0 throwing codes

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Old Dec 14, 2017 | 10:49 PM
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2004 6.0 throwing codes

It is throwing theses codes
U0105
P1378
P0673
P0649
P0460
Any ideas on what it could be or what I can do to get an idea. Truck still runs fine it also has a edge tuner but is on stock tune
thank you
 
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Old Dec 15, 2017 | 08:08 AM
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P1378
Could be low batteries, loose connections (or excessive circuit resistance), bad relay, or even a bad FICM: FICM detects logic power low, less than 7 volts. Low batteries, loose connections/ resistance in circuit, defective relay.

P0673
#3 glow plug circuit

P0649
Cruise Control Lamp Control Circuit

P0460
Fuel level sensor A. Float arm in the tank, bad instrument cluster, you keep filling the tank up to the same level (customer fueling habits), or fuel pump module concern.

Fuel Level Sensor A circuit: TSB 06-13-11
Can be caused by the installation of aftermarket equipment such as remote starter systems and auxiliary fuel tanks.

Auxiliary fuel tanks that continuously replenish the vehicles main tank will cause a P0460. Customers that replenish the vehicles fuel tank from the auxiliary fuel tank while the key is on and engine is running, can set P0460.

The newest calibration will contain a revised strategy to eliminate the occurrence of a false P0460
 
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Old Dec 15, 2017 | 11:33 AM
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Originally Posted by bismic
P1378
Could be low batteries, loose connections (or excessive circuit resistance), bad relay, or even a bad FICM: FICM detects logic power low, less than 7 volts. Low batteries, loose connections/ resistance in circuit, defective relay.

P0673
#3 glow plug circuit

P0649
Cruise Control Lamp Control Circuit

P0460
Fuel level sensor A. Float arm in the tank, bad instrument cluster, you keep filling the tank up to the same level (customer fueling habits), or fuel pump module concern.

Fuel Level Sensor A circuit: TSB 06-13-11
Can be caused by the installation of aftermarket equipment such as remote starter systems and auxiliary fuel tanks.

Auxiliary fuel tanks that continuously replenish the vehicles main tank will cause a P0460. Customers that replenish the vehicles fuel tank from the auxiliary fuel tank while the key is on and engine is running, can set P0460.

The newest calibration will contain a revised strategy to eliminate the occurrence of a false P0460
But do you think there is any correlation between all the codes. All came at once
 

Last edited by Quinnm04; Dec 15, 2017 at 11:34 AM. Reason: Forgot something
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Old Dec 15, 2017 | 11:52 AM
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Clear them, then see what comes back
 
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Old Dec 15, 2017 | 01:53 PM
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I cleared them twice and they came back at the same time together
 
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Old Dec 15, 2017 | 02:54 PM
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IMO the first thing to do is always charge batteries and then individually load test them.
 
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Old Dec 15, 2017 | 03:56 PM
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They are both brand new
 
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Old Dec 15, 2017 | 07:05 PM
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Not possible for a new battery to be bad? If you are sure of that, then the priority is determining why you are dropping below 7 volts of FICM logic power.
 
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Old Dec 16, 2017 | 06:56 AM
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Originally Posted by bismic
Not possible for a new battery to be bad? If you are sure of that, then the priority is determining why you are dropping below 7 volts of FICM logic power.
Agreed. I'd have the new batteries tested somewhere besides where they came from to start and then check all the cables, positive and ground to try and determine where the voltage loss is coming from.

I'd like to know if the tuner is a flash tuner or an inline tuner that interrupts the PCM signal? Like the old switch on the fly stuff.
 
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Old Dec 16, 2017 | 07:56 AM
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Thanks for jumping in Tim!!

In addition to your questions, I guess I should have asked if the FICM is OEM or aftermarket.

Continued operation at low FICM Lpower voltage will ruin the FICM (if in fact it is low).
 
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