My first (2) Codes

[Rusty_S]

I have an 2009 3500 4x4 that recently turned on the check engine light.

The first engine code is P2609 "Intake Air Heater System Performance" What are the possible causes for setting this code?

My second engine code is P0001 "Fuel Volumn Regulator Control Circuit / Open" Where should I start looking for an open circuit? Rusty

 

[PFranzese]

From what I see through a google search I found the following concerning the grid heater:

The following information is the diagnostic literature regarding the P2609 fault code. This will help you pinpoint the issue.


WHEN MONITORED
First 15 seconds of engine operation.

SET CONDITION
The ECM does not detect a voltage drop on the intake air heater circuit.

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

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

DIAGNOSTIC TEST

1. INTAKE AIR HEATER OPEN
Measure the resistance between the intake air heater supply and ground terminal on each intake air heater.

Q: 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). See: Verification Tests\Powertrain Verification Test - Ver 1

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).

Q: 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). See: Verification Tests\Powertrain Verification Test - Ver 1

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.

Q: 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). See: Verification Tests\Powertrain Verification Test - Ver 1

4. BATTERY CABLE OPEN
Measure the resistance of the battery cable between the battery and the intake air heater relay for both relays.

Q: 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). See: Verification Tests\Powertrain Verification Test - Ver 1

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.

Q: 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). See: Verification Tests\Powertrain Verification Test - Ver 1

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.

Q: Did the relay click when 12 volts was applied?

YES: Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure). See: Initial Inspection and Diagnostic Overview\Diagnostic Strategies
NO: Replace #2 Intake Air Heater Relay. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). See: Verification Tests\Powertrain Verification Test - Ver 1

 

[PFranzese]

I couldn't find much on the p0001. I did see some posts on other forums saying its not very common and usually a false code set by some other condition. I am not sure exactly what that means or what other condition could set it off. Sorry I couldn't be more helpful.

 

[Rusty_S]

Thanks for the diagnostic info. One thing I noticed was it mentioned (2) heaters, but I could only find (1). I did find the problem though. The solenoid that turns on the heater worked intermittently. After replacing the solenoid and erasing the code, it has never came back. Also the other code has never came back. Thanks again. Rusty