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Code P0659

Quick reference

P0659 at a glance

Plain-language meaning
This code means that a part of the car that helps control things like the engine or transmission is getting too much electricity.
Urgency
Moderate – While the vehicle may still operate, it could lead to further issues if not addressed.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Basic hand tools

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means that a part of the car that helps control things like the engine or transmission is getting too much electricity.

Explanation

The P0659 code is triggered when the Powertrain Control Module (PCM) detects a higher than expected voltage in the actuator supply voltage circuit 'A'.

Technical description

The actuator supply voltage circuit provides power to various actuators in the vehicle. A 'high' condition indicates that the voltage is above the normal operating range, which can lead to improper functioning of the actuators.

Symptoms

• Check Engine Light is on

• Poor engine performance

• Transmission shifting issues

Common Causes

• Faulty actuator

• Short circuit in the wiring

• Defective Powertrain Control Module (PCM)

Glossary

PCM: Powertrain Control Module

Actuator: A device that moves or controls a mechanism or system

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the wiring and connectors for damage or corrosion.

• Test the actuator for proper operation.

Repair procedures

• Repair or replace damaged wiring or connectors.

• Replace the faulty actuator.

• Reprogram or replace the PCM if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$150 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regularly inspect electrical connections.

• Ensure proper vehicle maintenance.

• Avoid exposure to extreme conditions that may damage wiring.

Error code type

Sensor Issue

User experience recommendations

• Do not ignore the Check Engine Light.

• Seek professional assistance if unsure about repairs.

Warranty information

Check with your vehicle's manufacturer for specific warranty coverage related to electrical components.

Historical data

P0659 has been a common code for vehicles with electrical issues in the actuator circuits, often related to wiring problems.

Urgency level

Moderate – While the vehicle may still operate, it could lead to further issues if not addressed.

Testing conditions

• Engine running

• Vehicle at operating temperature

Component location

The actuator circuit is typically located near the engine or transmission, depending on the specific actuator.

FAQs

Q: Can I drive with a P0659 code?
A: It is not recommended as it may lead to further damage or unsafe driving conditions.

Q: How do I clear a P0659 code?
A: After repairs, use an OBD-II scanner to clear the code from the PCM.

Optional diagnostic gear

Tools that may help diagnose P0659

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

View on Amazon
Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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