so after my truck started acting up i did trany and engine service thinking it might be a dirty filter but that wasnt it so i decided to put a scanner on the truck and this is what poped up
p2509 p2609

can you guys tell me what these are and how i can go about fixing them and how much it would cost. would i be able to do it myself thanks in advanced

 

Ok,
I pulled those codes up on: myscantool.com
The P2509 comes up as: ECM/PCM Power Input Signal Intermittent
The P2609 comes up as: Intake Air Heater System Performance
I don't know if those two are related but I would think of wiring / connections first. I think I would start with a visual inspection to see if there is any problems or damage anywhere. Look specifically for a wire being rubbed or cut. If that doesn't turn up anything, then I would start pulling connections apart and checking for corrosion and what not. While you are at it make sure all the wiring you can check is in good shape and that the connections are tight and clean. You can also do the battery cables (Both ends!). I'm thinking this might be a wiring problem that is causing voltage problems to the computer. If the voltage is off somewhere in the system, you can get all sorts of weird / intermittent problems! One place to check is near the starter. Just above it and in front of it is a 12 ga or so wire that might have been rubbed in the metal bracket there. The other common problem area to 3rd gen trucks is A/C sensor near the compressor. You can see this wire from underneath the truck. If it is rubbed bare and partially shorting to metal, it will drag down the sensor 5v supply and cause all sorts of strange things to occur. If you find any damage like that just get it sealed up and protected. Hopefully that should cure it for you!!

Do you know when your grid heater is on? If you have noticed the relay clicking it on and back off before you start the truck. Also, after you start it, you will notice the voltage drop as it cycles for a while after you have started the engine. If you have noticed this before, is this operating normally?
What else is the truck doing differently from what it normally does or that it shouldn't do or?

 

intake air heater sounds like a Mass Airflow Sensor, so i would look on the intake duct and find the sensor and clean that to fix that problem, if the problem persists i would replace the sensor. And Millco's right. i know with some land rovers, if battery terminals are dirty and voltage is variating, it messes with the computer. could be the same for your truck. clean the terminals and clear the codes, either with a scantool or just unhook the batteries for like 10 minutes.

 

The intake air heater is what the cummins has instead of glow plugs, its a plate between the intake elbow and the manafold.

 

P2509 is powerdown data lost error
P2609 is voltage drop not seen at air heater

P2509 possible causes
POOR CONNECTIONS AT THE BATTERIES
LOW BATTERY VOLTAGE
OPEN FUSED B+ TO ECM
OPEN GROUND CIRCUIT
BATTERY + SHORTED TO OTHER CIRCUITS
RETURN CIRCUIT SHORTED
BATTERY + SHORTED TO GROUND
INTERMITTENT CONDITION

P2609 possible causes
INTAKE AIR HEATER OPEN
INTAKE AIR HEATER GROUND OPEN
OPEN BATTERY CABLE FROM INTAKE AIR HEATER RELAY
BATTERY CABLE OPEN
#1 INTAKE AIR HEATER RELAY
#2 INTAKE AIR HEATER RELAY
INTERMITTENT CONDITION

 

Diagnostic Test
1. INTAKE AIR HEATER OPEN
Measure the resistance between the intake air heater supply and ground terminal on each intake air heater.
Is the resistance less than 10 Ohms?
Yes >> Go To 2
No >> Replace the open Intake Air Heater.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
2. INTAKE AIR HEATER GROUND OPEN
Measure the resistance of the intake air heater ground circuit between the intake air heater terminal and the intake
manifold cover ground connection.
NOTE: The intake air heater circuit is grounded through a conductive gasket on the top and bottom of the
air heater (grey colored gaskets).
Is the resistance less than 10 Ohms?
Yes >> Go To 3
No >> Repair the open Intake Air heater ground or replace both heater gaskets with the proper conductive
gaskets..
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
3. OPEN BATTERY CABLE FROM INTAKE AIR HEATER RELAY
Measure the resistance of the battery cable between the intake air heater and the intake air heater relay for both
intake air heaters.
Is the resistance less than 10 Ohms?
Yes >> Go To 4
No >> Repair The open or high resistance battery cable from the intake heater relay to heater.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

 

4. BATTERY CABLE OPEN
Measure the resistance of the battery cable between the battery and the intake air heater relay for both relays.
Is the resistance less than 10 Ohms?
Yes >> Go To 5
No >> Replace the battery cable from the battery to the Intake Air Heater Relay.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
5. #1 INTAKE AIR HEATER RELAY
Disconnect the #1 intake air heater relay signal wire.
Connect a jumper wire from the signal terminal of the #1 intake air heater relay to battery positive.
Did the relay click when 12 volts was applied?
Yes >> Go To 6
No >> Replace #1 Intake Air Heater Relay.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
6. #2 INTAKE AIR HEATER RELAY
Disconnect the #2 intake air heater relay signal wire.
Connect a jumper wire from the signal terminal of the #2 intake air heater relay to battery positive.
Did the relay click when 12 volts was applied?
Yes >> Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure).
No >> Replace #2 Intake Air Heater Relay.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

 

P2509 diagnostic testing

1. POOR CONNECTIONS AT THE BATTERIES
Visually inspect the wiring at the battery for damaged wires, or corrosion.
Are the connections tight and free of corrosion?
Yes >> Go To 2
No >> Repair the poor connections at the batteries.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
2. LOW BATTERY VOLTAGE
Measure the voltage between the positive and negative posts of the batteries.
Is the battery voltages both above 12 volts?
Yes >> Go To 3
No >> Recharge or replace the battery (s).
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
3. OPEN FUSED B+ TO ECM
Turn the ignition off.
Disconnect the ECM harness connectors.
Turn the ignition on.
Measure the resistance between the positive battery post and the ECM
supply circuits.
Is the resistance less than 10 Ohms?
Yes >> Go To 4
No >> Repair the open fused B+ circuit to ECM.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)
4. OPEN GROUND CIRCUIT
Measure the resistance between the negative battery post and the ECM
ground circuits.
Is the resistance less than 10 Ohms?
Yes >> Go To 5
No >> Repair the open ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)
5.BATTERY + SHORTED TO OTHER CIRCUITS
Measure the resistance between the ECM supply circuits and all other
circuits in the ECM harness connector, except other supply circuits.
Is the resistance greater than 100k Ohms?
Yes >> Go To 6
No >> Repair the battery circuit short to other circuits in engine
harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)

 

6. RETURN CIRCUIT SHORTED
Measure the resistance between the ECM return circuits and all other
circuits in the ECM harness connector, except other return circuits.
Is the resistance greater than 100k Ohms?
Yes >> Go To 7
No >> Repair or replace the engine harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)
7. BATTERY + SHORTED TO GROUND
Measure the resistance between the ECM B+ supply circuits and
ground.
Is the resistance greater than 100k Ohms?
Yes >> Refer to the INTERMITTENT CONDITION Symptom (Diagnostic
Procedure). (Refer to 9 - ENGINE - DIAGNOSIS
AND TESTING)
No >> Repair Battery + shorted to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)