MY truck has very little power,

these are the codes thrown...

P2149 BANK 2 (CYLINDERS 4-6) SHORTED HIGH OR LOW
P0582 HIGH VOLTAGE DETECTED AT THE SPEED CONTROL SWITCH

Where should I start, need to get my sons by the end of the day.

Thanks in advance for immediate help.

 

P2149
Possible causes:
OTHER DTC’S
HIGH SIDE DRIVER CIRCUIT OPEN
LOW SIDE DRIVER CIRCUIT OPEN
HIGH SIDE DRIVER SHORTED TO LOW SIDE DRIVER
HIGH SIDE DRIVERS SHORTED LOW
LOW SIDE DRIVER CIRCUIT SHORTED OTHER LOW SIDE DRIVER CIRCUIT
LOW SIDE DRIVERS SHORTED LOW
HIGH SIDE DRIVER SHORTED TO VOLTAGE
LOW SIDE DRIVER SHORTED TO VOLTAGE
LOW SIDE DRIVER CIRCUIT SHORTED IN INJECTOR HARNESS
INJECTOR
INJECTOR HARNESS
INTERMITTENT CONDITION
ECM
INTERMITTENT CONDITION

Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Injector 4-6 harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the injector high side driver circuit between the Bank 2 high side driver circuit in the ECM harness connector and the high side driver circuit in the injector harness connectors for cylinders 4-6.
Is the resistance less than 10 Ohms?
Yes= go to 3
No= Repair the open high side driver circuit from ECM harness
connector to the Injector harness connector.

3. Measure the resistance of the #4,#5, and #6 injector low side driver circuits between
the ECM harness connector and the injector harness connectors.
Is the resistance less than 10 Ohms?
All
Yes = Go To 4
No = Repair the open low side driver circuit.

4. Measure the resistance between the Bank 2 high side driver circuit at the ECM
harness connector and the low side driver circuit for injectors 4-6 at the ECM harness
connector.
Is the resistance more than 100k Ohms?
All
Yes = Go To 5
No = Repair the High side circuit shorted to the low side circuit.

5.Measure the resistance of the injector harness connector high side driver circuits to
battery negative for injectors 4-6.
Is the resistance more than 100k Ohms?
All
Yes = Go To 6
No = Repair the High side driver shorted low in the harness.
6. Measure the resistance of the injector harness connector Low side driver circuits to
battery negative for injectors 4-6.
Is the resistance more than 100k Ohms?
All
Yes = Go To 7
No = Repair the Low side driver shorted low in the harness.
7. Measure the voltage between the high side driver circuit in the engine harness and
battery negative.
Is the voltage less than 1 volt?
All
Yes = Go To 8
No = Repair the high side driver shorted to voltage.
8. Measure the voltage between the low side driver circuit in the engine harness and
battery negative for cylinders 4-6.
Is the voltage less than 1 volt?
All
Yes = Go To 9
No = Repair the low side driver shorted to voltage.
9. Measure the resistance of each of the Bank 2 low side driver circuit to all other Bank
1 low side driver circuits at the ECM harness connector.
Is the resistance greater than 100k ohms?
All
Yes = Go To 10
No = Repair Low side driver circuit shorted to other Low side driver
circuit.
10. Reconnect the disconnected injector harness connector.
Measure the resistance of each of the Bank 2 low side driver circuit to all other Bank
2 low side driver circuit at the ECM harness connector.
Is the resistance greater than 100k ohms?
All
Yes = Go To 11
No = Replace the injector harness.
11. Measure the resistance of each injector from the through head connector.
NOTE: Be sure to zero the ohm meter prior to checking the injector circuit.
Is the resistance greater than .8 ohm?
All
Yes = Go To 12
No = Go To 14
12. Disconnect the pigtail nuts from injectors 4-6.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance between the solenoid posts of each injector.
NOTE: Be sure to zero the ohm meter prior to checking the injector circuit.
Is the resistance less than 1 ohm and greater than 0 ohms?
All
Yes = Go To 13
No = Replace the fuel injector or injectors.
13. Measure resistance of each circuit in the injector harness from pigtail side to injector
harness connector.
Is resistance above 1 ohm?
All
Yes = Replace the injector harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
No = Refer to the INTERMITTENT CONDITION Symptom (Diagnostic
Procedure).

14. Reconnect the all injector pig tails harness connector.
Reconnect the ECM harness connector.
Reconnect the Injector harness connector.
Start the engine.
With the DRBIIIt, read DTCs.
Did the DTC return?
All
Yes = Replace and program the ECM in accordance with the Service
Information.
No = Test Complete

 

P0582-SPEED CONTROL VACUUM SOLENOID CIRCUIT
When Monitored: Ignition on Battery voltage greater than 10.4 volts. Cruise is learned
and powered. Brake is not pressed.
Set Condition: An open or shorted condition detected in the Speed Control Vacuum
Solenoid Control circuit for more than 0.325 of a second. One Trip Fault. Three good trips
to turn off the MIL.
POSSIBLE CAUSES
SPEED CONTROL SOLENOID OPERATION
SPEED CONTROL VACUUM SOLENOID
(V36) S/C VACUUM SOL CONTROL CIRCUIT SHORTED TO GROUND
(V36) S/C VACUUM SOL CONTROL CIRCUIT OPEN
PCM
1 Ignition on, engine not running.
With the DRBIIIt, read DTCs and record the related Freeze Frame data.
With the DRBIIIt, actuate the Speed Control Vacuum Solenoid and note operation.
Does the Speed Control Vacuum Solenoid actuate properly?
Yes = Refer to the INTERMITTENT CONDITION Symptom (Diagnostic
Procedure).
Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 4.
No = Go To 2
2 Turn the ignition off.
Disconnect the S/C Servo harness connector.
Ignition on, engine not running.
With the DRBIIIt, actuate the S/C Vacuum Solenoid.
Using a 12-volt test light connected to ground, probe the (V36) S/C Vacuum control
circuit.
Does the test light illuminate brightly and flash?
Yes = Replace the Speed Control Servo.
Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 4.
No = Go To 3
3 Turn the ignition off.
Disconnect the PCM harness connectors.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMINALS
RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (V36) S/C Vacuum Control at the Speed Control Servo
harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
Yes = Go To 4
No = Repair the excessive resistance in the (V36) S/C Vacuum Sol
Control circuit.
Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 4.
4 Measure the resistance between ground and the (V36) S/C Vacuum Control circuit at
the Speed Control Servo harness connector.
Is the resistance below 100 ohms?
Yes = Repair the short to ground in the (V36) S/C Vacuum Sol Control
circuit.
Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 4.
No = Go To 5
5 NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If the there are no possible causes remaining, view repair.

Repair
Replace and program the Powertrain Control Module per Service
Information.
Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 4.

 

That's all black and white from the manual.

I would check my battery cables, pull and re-seat my injector harnesses first, clean them up if they look bad.

From there, I'd look around the engine bay and make sure nothing was jacked up in the wiring. After that, it's following the diagnostic procedure I listed above.

Check your fuses and relays, too... look at the CP3/FCA. I doubt that has anything to do with it, but it's free to look.

HTH

mad

 

Thank you sir!

 

do a fast simple test first before doing madhat's proper procedure that may save some time, there is a 95% chance a injector solenoid is cracked. unplug the 4-5-6 injector plug near the rail with 6 in-line wires and check resistance of each injector. it should be about 0.5 ohms, one will be over 1 ohm to infinity ohms depending on where it cracked. if nothing found then proceed with the list.