AutoCodes – Toyota – P0354 2010 Toyota Camry

P0354 2010 Toyota Camry Code - Ignition Coil 4 Primary/Secondary Circuit

Quick Answer

The DIS is a 1-cylinder ignition system in which each cylinder is ignited by one ignition coil and one spark plug is connected to the end of each secondary wiring. Common causes include Faulty Ignition Coil 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 circuit poor electrical connection. 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: P0354 2010 Toyota Camry indicates Ignition Coil 4 Primary/Secondary Circuit.
Common causes: Common causes include Faulty Ignition Coil 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 circuit poor electrical connection.
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.

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Code Popularity 4,621

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 31, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0354 2010 Toyota Camry Description

The DIS is a 1-cylinder ignition system in which each cylinder is ignited by one ignition coil and one spark plug is connected to the end of each secondary wiring. A powerful voltage, generated in the secondary wiring, is applied directly to each spark plug. The sparks of the spark plugs pass from the center electrode to the ground electrodes.
The ECM determines the ignition timing and transmits the ignition (IGT) signals to each cylinder. Using the IGT signal, the ECM turns the power transistor inside the igniter on and off. The power transistor, in turn, switches on and off the current to the primary coil. When the current to the primary coil is cut off, a powerful voltage is generated in the secondary coil. This voltage is applied to the spark plugs, causing them to spark inside the cylinders. As the ECM cuts the current to the primary coil, the igniter sends back an ignition confirmation (IGF) signal to the ECM, for each cylinder ignition.

OBDII Code P0354 2010 Toyota Camry - Ignition Coil 4 Primary/Secondary Circuit - AutoCodes.com — P0354 2010 Toyota Camry Code - Ignition Coil 4 Primary/Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P0354 2010 Toyota Camry?

Faulty Ignition Coil 4
Ignition Coil 4 harness is open or shorted
Ignition Coil 4 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0354 2010 Toyota Camry?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0354 2010 Toyota Camry code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0354 2010 Toyota Camry code?

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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 P0354 2010 Toyota Camry Code

1. What does the OBDII code P0354 mean on a 2010 Toyota Camry?

P0354 indicates an issue in the ignition coil "D" primary or secondary circuit, which corresponds to cylinder 4 in the engine.

2. What are the common symptoms of code P0354 in a 2010 Toyota Camry?

Symptoms include engine misfires, rough idling, reduced fuel efficiency, poor acceleration, and the Check Engine Light being illuminated.

3. What causes the P0354 code to appear?

Common causes are a faulty ignition coil, damaged wiring or connectors to the coil, a failed spark plug, or a problem with the engine control module (ECM).

4. Can I still drive my 2010 Toyota Camry with a P0354 code?

While the car may still run, driving with this code can cause further engine damage due to misfiring and may lead to reduced performance and fuel economy.

5. How do I diagnose the P0354 code on my Toyota Camry?

Use an OBDII scanner to confirm the code, inspect the ignition coil and wiring for damage, test the coil's resistance, and check the ECM for proper functionality.

6. How do I fix the P0354 error in a 2010 Toyota Camry?

Repairs may include replacing the ignition coil for cylinder 4, repairing or replacing damaged wiring, replacing the spark plug, or reprogramming or replacing the ECM if necessary.

7. How much does it cost to fix the P0354 code on a Toyota Camry?

Repair costs can vary, with ignition coil replacement typically costing $50-$150 for the part and additional labor charges if done by a mechanic.

8. Can a bad spark plug cause the P0354 code?

Yes, a worn or damaged spark plug can cause misfiring and trigger the P0354 code due to improper ignition coil operation.

9. How can I prevent the P0354 code from occurring?

Regular maintenance, including replacing spark plugs and ignition coils as recommended, and inspecting wiring connections, can help prevent this issue.

10. Will clearing the P0354 code fix the problem?

Clearing the code will turn off the Check Engine Light temporarily, but the issue will persist unless the root cause is addressed.