Error Code P069F is defined as Throttle Actuator Control Lamp Control Circuit. This code is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II scanner, particularly those made since 1996 up to present. This includes vehicle models from, but not limited to, Chevrolet, Chrysler, Ford, Dodge, GMC, Hyundai, Kia, Toyota, etc. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model to another.
The throttle actuator lamp is integrated into the instrument panel and works by alerting the driver of any malfunction in the throttle actuator control system, which illuminates when the latter malfunctions. The job of the throttle actuator control system is to open and close the throttle plate, to increase or decrease the RPM as demanded.
Whenever the ignition is turned on, the PCM (powertrain control module, also known as ECM or engine control module in other vehicle makes) monitors the continuity of the throttle actuator control lamp control circuit. To actuate the throttle plate and regulate the right degree of ambient air that enters the engine, the throttle actuator control system uses input signals from the vehicle TPS (throttle position sensor). The PCM then supplies electric servo motors, with the required voltage signal to open or close the throttle plate, as demanded.
Every time the ignition is turned on, and the PCM is energized, multiple controller self-tests are performed. Aside from running internal controller self-tests, the CAN (controller area network) carries serial data from each module, ensuring the onboard controller are interfacing correctly.
Error Code P069F is stored when the PCM detects a malfunction in the throttle actuator control lamp control circuit. This also activates the Check Engine light.
- Inoperative throttle actuator control system
- Inoperative throttle actuator control lamp
- Throttle actuator control lamp illuminated
Other throttle system codes may be stored as well.
There are multiple reasons for this code to appear, such as:
- Defective PCM
- A programming error in PCM
- Open or shorted throttle actuator control lamp control circuit
- Defective throttle actuator control lamp bulb
How to Check
A diagnostic scanner, DVOM (digital volt-ohmmeter), and a source of reliable vehicle information are required in diagnosing this code.
As with most codes, it’s important to refer with the TSB (technical service bulletin) regarding the code and its symptoms, with vehicle year, make, model and engine considered.
Connect the scanner and retrieve all stored codes, including their freeze frame data. Write these down in case the problem is proven to be intermittent. Then, clear the codes and take the vehicle for a test drive (if possible), until the code resets, or the PCM enters readiness mode.
If the vehicle enters readiness mode, then the problem is intermittent. This means you need to wait for the problem to worsen before you can properly diagnose it. If the code resets immediately, then continue with the diagnosis.
Then, use the vehicle information source to find the face views, connector pin-out charts, wiring diagrams, component locators, and diagnostic flow charts related to the vehicle.
Then, use the DVOM and wiring diagram to check whether the throttle actuator control warning lamp circuit gets the right battery voltage. If not, then check the system fuses and relays, and replace defective parts as necessary. If voltage is discovered at the throttle actuator control warning lamp, then you can suspect a defective throttle actuator control warning lamp bulb.
If the throttle actuator control warning lamp bulb is working properly, and the Error Code P069F still prevails (resets), then test controller power supply fuses and relays using the DVOM. Replace any damaged or blown fuses as required. Fuses should be tested with the circuit loaded.
If all fuses and relays seem to be working properly, then, conduct a visual inspection of the controller related wiring and harness. Check the chassis and engine ground junctions. Consult with the vehicle information source to get the ground locations for related circuits.
Next, inspect the system controllers and look for signs of water damage, heat, or collision damage. Any damaged controller, especially those affected by water, is considered defective.
If both controller power and ground circuits are intact, then you can suspect a defective controller or a programming error in the controller. Replacing and reprogramming this controller is required. In some cases, you may have to purchase reprogrammed controllers through aftermarket sources.
How to Fix
Depending on your diagnosis, common repairs for this code include:
- Replacement and reprogramming of PCM
- Repair of open or short problem in the throttle actuator control lamp control circuit
- Replacement of defective throttle actuator control lamp bulb
- Replacement of system controller
Other vehicles/controllers will require on-board reprogramming that may only be done through a dealership or qualified shops.
If the throttle actuator control lamp is unable to light up during KOEO (key on engine off), then you can suspect a defective throttle actuator control lamp bulb.
Test for the integrity of the controller ground by connecting the negative test lead of the DVOM to the ground and the positive test lead to battery voltage.