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DTC codes / P06xx · Computer and output circuits / P069F

P069FThrottle Actuator Control Lamp Control Circuit

P069F indicates that the powertrain control module (PCM) has detected a fault in the electrical circuit that controls the throttle actuator control (TAC) warning lamp, which is the light that alerts the driver to a problem with the electronic throttle system. The PCM monitors the lamp circuit for expected voltage or current when the lamp is commanded on or off, and it sets this code when the circuit does not respond as expected, which may be due to a wiring fault, a failed lamp, or an internal PCM driver issue.

SystemPowertrain
Code typeGeneric (all makes)
SeverityLow
Fix difficultyIntermediate
AreaComputer and output circuits

Symptoms you may notice

  • The TAC warning lamp may fail to illuminate when the ignition is turned on, so the bulb check does not occur.
  • The TAC warning lamp may stay illuminated continuously even when no throttle fault is present.
  • Often no symptoms besides the warning light, and the engine may run and drive normally.
  • In some cases, the electronic throttle may enter a reduced-power mode if the PCM cannot trust the lamp circuit.
  • A stored P069F code may be the only sign, with no other dashboard warnings.
  • Intermittent lamp operation may be noticed, with the light flickering or working only over bumps.

Common causes, most likely first

  1. A burned-out or damaged TAC warning lamp bulb or light-emitting diode (LED).
  2. Corroded, loose, or disconnected electrical connector at the instrument cluster or PCM.
  3. An open or short circuit in the wire between the PCM and the TAC warning lamp.
  4. A faulty instrument cluster circuit board or lamp driver.
  5. A failed PCM driver for the lamp control circuit, often due to water intrusion or internal damage.
  6. Aftermarket accessories or poor previous repairs tapping into the lamp circuit.
  7. A poor ground connection shared by the instrument cluster and PCM.

How to diagnose and fix it

  1. Verify the TAC warning lamp illuminates during the bulb check with the key on and engine off; if not, inspect the bulb or LED first.
  2. Check for any related diagnostic trouble codes (DTCs) in the PCM and body control module (BCM) that may indicate a shared circuit fault.
  3. Inspect the wiring harness and connectors between the PCM and the instrument cluster for chafing, corrosion, or loose pins.
  4. Use a digital multimeter to check for continuity and voltage on the lamp control circuit with the PCM commanding the lamp on and off.
  5. If the circuit tests good, substitute a known-good lamp or cluster to rule out the cluster itself.
  6. Check the PCM ground and power feeds, and inspect the PCM connectors for water intrusion or corrosion.
  7. If all external circuits and components test good, suspect an internal PCM fault and follow the manufacturer's diagnostic flow for PCM replacement or reprogramming.

What the TAC Lamp Circuit Really Means

  • A P069F code does not necessarily mean the throttle body or accelerator pedal is faulty; it only flags the warning lamp circuit, so replacing throttle components is a common misdiagnosis.
  • Many vehicles use the same lamp for multiple functions, so a fault in the instrument cluster or a shared ground can set this code even when the TAC system itself is healthy.
  • Intermittent P069F codes often trace to a poor connection at the cluster connector that acts up with temperature changes or vibration, not to a failed PCM.
  • Some aftermarket remote start or alarm systems tap into the warning lamp circuit, causing unexpected faults that only appear after the accessory is installed.
  • A failed lamp can prevent the driver from seeing a real throttle fault, so resolving P069F promptly restores an important safety warning.

Can I keep driving with P069F?

The vehicle is generally safe to drive because P069F affects only the warning lamp circuit, not the throttle operation itself, but you should avoid ignoring it since the lamp may not warn you of a future throttle problem. Have the circuit inspected soon, especially if the lamp never illuminates during the bulb check.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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