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vwnewton, VW Owner,ASE Master and L1 Advanced
Category: VW
Satisfied Customers: 307
Experience:  25 years of VW obsession turned into a job, last 15 years as a VW Tech.
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EPC light and P2294 Code on the Auto Xray tool. Loss of

Customer Question

Hello. EPC light and P2294 Code on the Auto Xray tool. Loss of power and failure to go when gas is pressed.
JA: Just to clarify, what are the exact lights you're talking about?
Customer: EPC light on the dash
JA: What is the model/year of your VW?
Customer: 2006 passat 2.0
JA: Are you fixing your Passat yourself? What have you tried so far?
Customer: yes. Replaced the following, in tank fuel pump, high pressure fuel pump, cam follower, spark plugs and coils.
JA: Anything else you want the mechanic to know before I connect you?
Customer: nope
Submitted: 23 days ago.
Category: VW
Expert:  david craig replied 23 days ago.

Hi Im David, Most of the faults associated with this code will be electrical in nature. This means that there is nothing mechanically wrong with the engine, but the there is an electrical breakdown happening in the wiring or connectors. This could be wiring that has gotten brittle due to heat from the engine, or a terminal in a connector having poor tensions, causing a poor connection in the circuit for the fuel pressure regulator.

Expert:  david craig replied 23 days ago.

There are few electrical problems that could cause this code as well. They include replacing a faulty fuel pressure sensor and fixing various electrical connection issues in the circuit. The connection issues could be due to a spread terminal in a connector or a wire being rubbed through in the engine wiring harness.

Customer: replied 23 days ago.
Okay. So where should I start looking and do you have a schematic to trace the wiring down?
Expert:  david craig replied 23 days ago.

start at the fuel pressure sensor and inspect the wiring and the connector. ill look for a wiring print.

Expert:  david craig replied 23 days ago.

Fuel Pressure Sensor/Switch: Testing and Inspection
Fuel Pressure Sensor G247, Checking

Fuel Pressure Sensor G247, Checking

Special tools, testers and auxiliary items required

‹› Multimeter.

‹› Wiring diagram.

Test requirements

‹› The Fuel Pump (FP) Control Module (J538) OK.

‹› The Motronic Engine Control Module (ECM) (J623) fuses OK.

‹› The fuel filter OK.

‹› The battery voltage at least 12.5 V.

‹› All electrical consumers switched off (radiator fan must NOT run during test).

‹› A/C switched off.

‹› The fuel tank at least 1/4 filled.

‹› The ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Computers and Control Systems/Testing

and Inspection/Scan Tool Testing and Procedures/Preliminary Check.

Start diagnosis

-Remove the engine cover with air filter.

Checking voltage

-Disconnect the Fuel Pressure Sensor (G247) electrical harness connector - 1 -.

-Switch the ignition on.

-Using a Multimeter, check the Fuel Pressure Sensor (G247) electrical harness connector terminals for voltage.

Switch the ignition off.If the specified value was obtained:-Replace the Fuel Pressure Sensor (G247). If the specified value was not obtained:Checking wiring connectionsIf the manufacturers test box is being used. Perform the following step.-Install the test box.If the manufacturers test box is not being used. Perform the following step.-Remove the Motronic Engine Control Module (ECM) (J623). Refer to => [ Motronic Engine Control Module J623, Replacing ] See: Computers
and Control Systems/Engine Control Module/Service and Repair/Removal and Replacement/Motronic Engine Control Module J623, Replacing.-

Using a Multimeter, check the Fuel Pressure Sensor (G247) electrical harness connector terminals to the Motronic Engine Control Module (ECM)
(J623) electrical harness connector T60 terminals for an open circuit according to the wiring diagram.
Expert:  david craig replied 23 days ago.

Specified value: 1.5 ohms Max.

If the specification is not obtained:

-

Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).

-

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-

If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring:

-

Erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Modes 01 - 09/Diagnostic Mode 04 - Erase DTC Memory.

-

Perform a road test to verify repair.

If the DTC does not return:

Repair complete, Generate readiness code. Refer to => [ Readiness Code ] See: Computers and Control Systems/Testing and Inspection/Monitors,
Trips, Drive Cycles and Readiness Codes/Readiness Code.

-

End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was not OK:

-

Replace the Motronic Engine Control Module (ECM) (J623). Refer to => [ Motronic Engine Control Module J623, Replacing ] See: Computers
and Control Systems/Engine Control Module/Service and Repair/Removal and Replacement/Motronic Engine Control Module J623, Replacing.

-

Assembly is performed in the reverse of the removal.

Final Procedures

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] See: Computers and Control Systems/Testing and

Inspection/Scan Tool Testing and Procedures/Diagnostic Modes 01 - 09/Diagnostic Mode 03 - Read DTC Memory.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems/Testing and

Inspection/Scan Tool Testing and Procedures/Diagnostic Modes 01 - 09/Diagnostic Mode 04 - Erase DTC Memory.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] See: Computers and Control Systems/Testing and

Inspection/Monitors, Trips, Drive Cycles and Readiness Codes/Readiness Code

Expert:  david craig replied 22 days ago.

any luck?

Expert:  david craig replied 21 days ago.

checking in to see how its going

Expert:  david craig replied 20 days ago.

hello???

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