???I plugged in the OBDII scanner??? what is this code - Ford Powerstroke Diesel Forum
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Old 08-14-2008, 03:37 PM
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???I plugged in the OBDII scanner??? what is this code

Well the check engine light came on yesterday so today I plugged in the OBDII scanner in and it is suppose to give you a code and a briefe discription well it threw two codes P1391 and P1393 Can anyone tell what these mean. Also if you can how to fix them.

Thanks in advance
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Old 08-14-2008, 03:47 PM
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KC1 DTC P1391 AND P1395 RIGHT BANK, P1393 AND P1396 LEFT BANK AND P1994 CENTER MONITORING CIRCUIT
Note: The glow plug system is monitored when the glow plugs are commanded on for more than 35 seconds and battery voltage is between 11.5-14 volts.

DTC P1395 or P1396 will set on the bank that is reading less than 39 amps. Loose fitting pins in the circuit connectors causing high resistance or high-resistance glow plug(s) on that bank could be the cause. A shorted circuit or low-resistance glow plug(s) on the opposite bank could also be the cause. Each bank needs to draw more than 39 amps.

DTC P1391 or P1393 will set when the monitor indicates that all four glow plugs are not being powered on that bank. An open in the glow plug circuits, glow plug relay, glow plugs or monitoring circuit could be the possible causes.

Both DTCs P1391 and P1393 together will set when the monitor indicates that all eight glow plugs are not being powered. An open in all glow plug circuits, the glow plug relay, glow plugs, fusible links or all three monitoring circuits could be the possible causes.

Possible causes:
glow plug relay
glow plug shunt
open in glow plug circuit(s) or monitoring circuit(s)
glow plugs
PCM
Key on, engine off.
Access PIDs VPWR, EOT, GPCTM, GPMR and GPML.
Verify that EOT is below 55C (131F) for F-Series or 30C (86F) for Econoline and GPCTM is greater than 35 seconds.
Compare GPMR to GPML, and record both readings.
Measure voltage of Circuit 38 (BK/O) between glow plug relay and ground.
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Old 08-14-2008, 10:20 PM
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WOW!!!!!! thanks for the info. You have alot of knowledge about OBDII scanning and trouble shooting the problems. If you don't mind me asking what OBDII scanner do you have?
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Old 08-14-2008, 11:15 PM
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Also could you put "bank" in lamems terms. Thanks
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Old 08-15-2008, 05:17 AM
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Quote:
Originally Posted by blksmk View Post
WOW!!!!!! thanks for the info. You have alot of knowledge about OBDII scanning and trouble shooting the problems. If you don't mind me asking what OBDII scanner do you have?
Snap on 2500 ...BTW ,,the info was from the manual...
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Old 08-15-2008, 05:19 AM
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Originally Posted by blksmk View Post
Also could you put "bank" in lamems terms. Thanks

Both DTCs P1391 and P1393 together will set when the monitor indicates that all eight glow plugs are not being powered. An open in all glow plug circuits, the glow plug relay, glow plugs, fusible links or all three monitoring circuits could be the possible causes.
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Old 08-15-2008, 05:25 AM
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R bank 2,4,6,8 L bank 1,3,5,7
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Old 08-15-2008, 07:18 AM
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More info....

Glow Plug Monitor
A diesel engine calibrated for California utilizes a Glow Plug Monitor (GPM) system designed to locate failed glow plugs or failed wiring in the glow plug system. Diagnostic Trouble Codes (DTCs) indicate which bank has failed glow plugs or failed glow plug wiring.

The GPM system uses a one piece conductor with two low resistance shunts. One shunt conducts current to the glow plugs in the left cylinder head and the other shunt conducts the current for the right cylinder head. Three sensing wires measure the voltage drops across the shunts when the glow plugs are operating (the voltage drops are proportional to the current in the shunt). The voltage drops are measured after the glow plug current stabilizes (approximately 30 seconds). Therefore, this system only checks glow plug operation when oil temperature and/or altitude conditions cause the glow plugs to stay on for 30 seconds or more and system voltage is between 11.5 and 14.0 volts.






During the KOER Glow Plug Monitor Test the glow plugs will be commanded on until the monitor is complete and will operate independent of oil temperature or altitude.

The GPM also checks the sensing wires for out of range readings. These checks indicate a shorted or open sensing wire, or a glow plug relay failure by setting DTCs. The DTCs are stored in continuous memory when a fault is determined, and the Malfunction Indicator Lamp (MIL) is illuminated on the second drive cycle if an OBD II fault is detected.

The glow plug relay coil is checked for opens or shorts as part of Comprehensive Component Monitoring.

The following is an example of some of the input and output components monitored by the GP monitor. The components monitored belong to the engine system.

Inputs:

Engine Oil Temperature, Barometric Pressure Sensor (BARO), ...
Outputs:

Glow Plug Relay (GPR), Glow Plugs
The MIL is activated after a fault is detected on two consecutive drive cycles, if the fault detected affects emissions.








--------------------------------------------------------------------------------
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Old 08-15-2008, 07:24 AM
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Quote:
Originally Posted by szyd View Post
R bank 2,4,6,8 L bank 1,3,5,7

From the manual :

The 7.3L diesel engine is:

a four cycle turbocharged V-8 with overhead valves
7.3 liters (444 cubic inches) displacement
separated into two banks, the right bank numbered 1, 3, 5, 7 and the left bank numbered 2, 4, 6, 8
rated at 215 horsepower at 3000 rpm
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Old 08-15-2008, 09:14 AM
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You go RED!


Bill AKA Green B
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