Fault code P069E is called “Fuel Pump Control Module Requested MIL Illumination” but in different programs it may be called differently. This fault designation applies to all vehicles equipped with OBD-II.
Technical description and explained code P069E
This Diagnostic Trouble Code (DTC) is a general powertrain code. Error P069E is considered a general code because it applies to all makes and models of vehicles. Although the specific repair steps may vary slightly depending on the model.
Stored code P069E means that the transmission control module (PCM) has detected a malfunction in the fuel pump control module. Therefore, it has requested that the “Check Engine” malfunction control lamp turn on.
The fuel pump control module is responsible for supplying and adjusting voltage to the fuel pump relay and fuel pump. Typically, the fuel pump controller is integrated into the PCM. But it can also be a stand-alone module.
The fuel pump delivers pressurized fuel to the injection system. It is most often located inside the fuel tank, but can also be located along the fuel ramp. In diesel powertrains, high-pressure pumps are the most common. These are mounted on the engine and are driven by the engine.
Each time the ignition is turned on (and the PCM is powered), several controller self-tests are performed. These controllers include a fuel pump control module.
By performing internal controller self-tests, the PCM can monitor serial data. Transmitted over the Controller Area Network (CAN) to ensure that the internal controllers are communicating properly.
If the fuel pump control module has requested to turn on the control lamp, code P069E will be stored. The malfunction indicator lamp (MIL) will illuminate and you will see the “Check engine” icon on the control panel.
Symptoms of vehicle malfunctions
The main signal that an error P069E has occurred is the Malfunction Indicator Lamp (MIL) is also known as the CheckEngine Light.
It can also be warning signs such as:
- Poor engine starting.
- Inability to start the power unit.
- Problems with engine controllability.
- Other stored codes.
The stored fault code P069E is serious because it directly affects the correct operation of the engine. Therefore, it is recommended to eliminate this fault as soon as possible.
Factors that can cause this error code
The error code P069E can mean that one or more of the following problems have occurred:
- Fuel pump controller is defective.
- Fuel pump control module power supply circuit breakage.
- Fuel pump voltage disconnect switch faulty or tripped.
- PCM failure or programming error.
How to fix or reset OBD-2 code P069E
Some suggested steps for troubleshooting and fix the error code P069E:
- Check voltage at fuel pump.
- Use a multimeter to test wires and connectors.
- Inspect fuses as well as relays, replace if necessary.
- Check the emergency fuel switch (if equipped).
- Test fuel pump for proper operation, replace if necessary.
Diagnose and repair of problems
If other fuel pump or fuel supply codes are stored, diagnose and correct them before attempting to diagnose code P069E. Check the vehicle information in the Technical Service Bulletins (TSBs) that reproduce the stored code. If you find the appropriate TSB, it may provide useful diagnostic information.
Diagnosing the P069E code will require a diagnostic scanner, a digital multimeter, and a source of reliable vehicle information.
Start by connecting the scan tool to the vehicle’s diagnostic port and retrieving all stored codes and data. Record this information just in case the code turns out to be “flashing”. After writing all the relevant information, clear the codes and test drive the vehicle (if possible) until the code is cleared or the PCM goes into standby mode.
If the PCM goes into standby mode, the code is intermittent and will be more difficult to diagnose. The condition that caused P069E to persist may have to worsen before an accurate diagnosis can be made. If the code is reset, continue the diagnosis.
Use the vehicle’s information source to obtain connector types, connector pin diagrams, component location pointers. And wiring diagrams, diagnostic block diagrams related to the code in question and the vehicle.
Check for battery voltage in the fuel pump control circuit using the appropriate wiring diagram and your multimeter. If not, check the system fuses and relays and replace faulty parts if necessary.
Sometimes the vehicle may be equipped with a fuel pump voltage disconnect switch, check it to make sure it has not been activated or malfunctioned.
When there is no voltage or ground in the fuel pump control circuit, and all fuses and relays are working properly. The wiring and harnesses associated with the controller should be checked.
If voltage is present in the fuel pump control circuit, check the system controllers for signs of water, heat, or collision damage. Any controller that is damaged (especially by water) should be considered faulty.
If the power and ground circuits of the controller are not damaged, a faulty controller or controller programming error should be suspected. Replacing the controller will require reprogramming.
If the vehicle is involved in an accident, first check the fuel pump voltage switch. Check the ground continuity of the controller by connecting the negative test lead of a multimeter to ground. And the positive test lead to the battery voltage.
On which vehicles does this problem occur most frequently
Fault code P069E can occur on different vehicles but there are statistics on which brands this occurs most often. Here is a list of some of them:
- Cadillac (Escalade)
- Chevrolet (Captiva, Malibu, Silverado, Tahoe)
- Opel (Antara, Astra, Insignia)
Fault code P069E can sometimes be found with other errors. The most common are the following: P0106, P0191, P0231, P023F, P0420, P0430, P0573, P0641, P06A6, P1682, C0035, C0561, C0899, C0900.