The P0659: Actuator Supply Voltage ‘A’ Circuit High code refers to an issue with the supply voltage in the ‘A’ circuit, where the voltage is higher than expected. This can prevent the actuators from functioning correctly and may cause performance issues in systems reliant on actuators. The issue can be caused by a high voltage in the circuit, a faulty actuator, or wiring problems.
P0659 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0659: Actuator Supply Voltage ‘A’ Circuit High |
| Is it serious? | Yes, as it can affect systems reliant on actuators, such as throttle or transmission control. |
| Possible causes | – High voltage in actuator supply voltage ‘A’ circuit – Faulty actuator – Wiring issue |
| How to diagnose? | – Test actuator supply voltage ‘A’ circuit for voltage – Inspect wiring and connectors – Replace actuator if necessary |
P0659 Meaning
The P0659 code indicates that the actuator supply voltage ‘A’ circuit is receiving higher-than-expected voltage. This excessive voltage can damage the actuators or prevent them from operating correctly, which may lead to issues with engine control or other systems that depend on actuators.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional codes related to actuators or voltage issues that might help pinpoint the problem. | OBD-II Scanner |
| Test Actuator Supply Voltage ‘A’ Circuit for Voltage | Use a multimeter to measure the voltage in the actuator supply voltage ‘A’ circuit. Compare the voltage to manufacturer specifications to ensure it’s within the correct range. | Multimeter |
| Inspect Wiring and Connectors | Inspect the wiring and connectors associated with the actuator supply voltage ‘A’ circuit for signs of damage, loose connections, or corrosion that could cause high voltage. | Flashlight, Multimeter |
| Test the Actuator | Test the actuator controlled by the supply voltage ‘A’ circuit to ensure it is receiving the correct voltage and operating properly. | Diagnostic Tool, Multimeter |
| Replace the Actuator if Necessary | If the actuator is faulty and unable to handle the voltage, replace it to restore proper system function. | Replacement Actuator, Tools |
| Clear the Code and Test | After repairs, clear the code using an OBD-II scanner and test the vehicle to ensure that the actuator supply voltage circuit is functioning correctly. | OBD-II Scanner, Vehicle Manual |
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