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Engine-Codes – Toyota – P0352 2004 Toyota Highlander

P0352 2004 Toyota Highlander Code - Ignition Coil 2 Primary/Secondary Circuit

Quick Answer

The diagnostic trouble code P0352 for a 2004 Toyota Highlander specifically refers to the Ignition Coil 2 Primary/Secondary Circuit. Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Issues with the Engine Control Module (ECM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0352 2004 Toyota Highlander indicates Ignition Coil 2 Primary/Secondary Circuit.
Common causes
Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Issues with the Engine Control Module (ECM).
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P0352 2004 Toyota Highlander Description

The diagnostic trouble code P0352 for a 2004 Toyota Highlander specifically refers to the Ignition Coil 2 Primary/Secondary Circuit. This code indicates a problem with the ignition coil associated with cylinder 2 in the engine. The ignition coil is a crucial component of the ignition system, responsible for converting the low voltage from the battery into the high voltage needed to create a spark in the spark plugs. This spark ignites the air-fuel mixture in the engine cylinders, allowing the vehicle to run smoothly.

OBDII Code P0352 2004 Toyota Highlander - Ignition Coil 2 Primary/Secondary Circuit
P0352 2004 Toyota Highlander Code - Ignition Coil 2 Primary/Secondary Circuit

Common Causes of P0352 2004 Toyota Highlander

  1. Faulty ignition coil
  2. Damaged wiring or connectors in the ignition coil circuit
  3. Issues with the Engine Control Module (ECM)
  4. Spark plug issues
  5. Carbon buildup on spark plugs

Symptoms of P0352 2004 Toyota Highlander

  1. Engine misfires
  2. Rough idling or vibrations
  3. Decreased acceleration
  4. Engine stalling
  5. Illumination of the Check Engine Light

How to Fix P0352 2004 Toyota Highlander

  1. Diagnose the specific issue using a scan tool to confirm the P0352 code and pinpoint the faulty ignition coil.
  2. Locate the ignition coil associated with cylinder 2 in the engine.
  3. Replace the faulty ignition coil with a new, high-quality part.
  4. Inspect and repair any damaged wiring or connectors in the ignition coil circuit.
  5. Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0352 2004 Toyota Highlander

The typical repair costs for addressing the P0352 code in a 2004 Toyota Highlander can range from $150 to $300, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. To obtain a more accurate estimate, it's recommended to inquire about local rates before proceeding with the repair.

When is the Code Detected?

Each ignition circuit is continuously monitored by the Engine Control Module (ECM). The test fails when the ECM does not receive a valid pulse signal from the ignition coil.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0352 2004 Toyota Highlander Code

1. What does the OBDII code P0352 mean for a 2004 Toyota Highlander?

P0352 indicates a malfunction in the Ignition Coil 2 Primary/Secondary Circuit, meaning the engine's computer has detected an issue with the ignition coil controlling cylinder 2.

2. What are the common symptoms of code P0352 in a 2004 Toyota Highlander?

Symptoms may include engine misfires, rough idling, reduced fuel efficiency, hesitation during acceleration, and the Check Engine Light turning on.

3. What causes the P0352 code to appear?

Common causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, a failing spark plug, or a malfunctioning Engine Control Module (ECM).

4. Can I still drive my 2004 Toyota Highlander with a P0352 code?

It’s possible to drive short distances, but prolonged driving with this code can cause engine damage or catalytic converter failure due to unburned fuel entering the exhaust system.

5. How do I diagnose the P0352 code on my 2004 Toyota Highlander?

Start by inspecting the ignition coil, wiring, and connectors for damage or corrosion. Use a multimeter to test the coil's resistance and check for voltage supply. A scan tool can also help monitor live data for cylinder 2 misfires.

6. How do I fix the P0352 code on a 2004 Toyota Highlander?

Repairs often involve replacing the faulty ignition coil, repairing damaged wiring or connectors, replacing the spark plug for cylinder 2, or reprogramming/repairing the ECM if needed.

7. How much does it cost to fix code P0352 in a 2004 Toyota Highlander?

Repair costs can vary, but replacing a single ignition coil typically costs $50-$150 for parts, plus $50-$100 for labor if done by a professional.

8. Can a bad spark plug cause a P0352 code?

Yes, a worn or damaged spark plug in cylinder 2 can create excessive resistance, leading to ignition coil circuit issues and triggering the P0352 code.

9. How do I prevent the P0352 code from returning?

Regular maintenance, such as replacing spark plugs and ignition coils at recommended intervals and inspecting wiring for damage, can help prevent this issue.

10. Will clearing the P0352 code fix the problem permanently?

No, clearing the code only resets the Check Engine Light temporarily. The underlying issue in the ignition coil circuit must be diagnosed and repaired to prevent the code from returning.

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