AutoCodes – Toyota – P0351 2005 Toyota Prius

P0351 2005 Toyota Prius Code - Ignition Coil 1 Primary/Secondary Circuit

Quick Answer

The ignition system on the vehicle uses individual ignition coils for each cylinder. Common causes include Faulty Ignition Coil 1, Ignition Coil 1 harness is open or shorted, Ignition Coil 1 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
P0351 2005 Toyota Prius indicates Ignition Coil 1 Primary/Secondary Circuit.
Common causes
Common causes include Faulty Ignition Coil 1, Ignition Coil 1 harness is open or shorted, Ignition Coil 1 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 3,236
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0351 2005 Toyota Prius Description

The ignition system on the vehicle uses individual ignition coils for each cylinder. The Engine Control Module (ECM) controls each ignition coil operation. The ECM sends a ON/OFF signal to energize the ignition coil to create a spark at the spark plug when a spark is required at the cylinder.
OBDII Code P0351 2005 Toyota Prius - Ignition Coil 1 Primary/Secondary Circuit - AutoCodes.com
P0351 2005 Toyota Prius Code - Ignition Coil 1 Primary/Secondary Circuit

What are the Possible Causes of the DTC P0351 2005 Toyota Prius?

  • Faulty Ignition Coil 1
  • Ignition Coil 1 harness is open or shorted
  • Ignition Coil 1 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P0351 2005 Toyota Prius?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0351 2005 Toyota Prius 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 P0351 2005 Toyota Prius code?

Need more information on how to fix the P0351 2005 Toyota Prius code? Get Access to Factory Service Manuals

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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 P0351 2005 Toyota Prius Code

1. What is OBDII code P0351 on a 2005 Toyota Prius?

Code P0351 indicates a problem with the ignition coil 1 primary/secondary circuit in a 2005 Toyota Prius.

2. What are the common symptoms of OBDII code P0351 in a 2005 Toyota Prius?

Common symptoms of code P0351 in a 2005 Toyota Prius include engine misfires, rough idling, lack of power, and illuminated check engine light.

3. What are the possible causes of OBDII code P0351 in a 2005 Toyota Prius?

Possible causes of code P0351 in a 2005 Toyota Prius include a faulty ignition coil, wiring issues in the ignition coil circuit, or a problem with the engine control module (ECM).

4. How can I diagnose the issue causing OBDII code P0351 in my 2005 Toyota Prius?

To diagnose the issue causing code P0351, you can perform a visual inspection of the ignition coil and its wiring, test the ignition coil using a multimeter, and check for any loose connections or damaged wires.

5. Can a bad spark plug cause OBDII code P0351 in a 2005 Toyota Prius?

Yes, a bad spark plug can potentially cause code P0351 in a 2005 Toyota Prius as it may lead to a misfire that triggers the ignition coil circuit fault.

6. How should I repair OBDII code P0351 in my 2005 Toyota Prius?

To repair code P0351, you may need to replace the faulty ignition coil, repair any damaged wiring in the circuit, or address any issues with the engine control module if necessary.

7. Is it safe to continue driving my 2005 Toyota Prius with OBDII code P0351?

It is not recommended to drive your 2005 Toyota Prius with an active code P0351, as it can lead to further engine damage and potentially unsafe driving conditions.

8. Can I reset OBDII code P0351 in my 2005 Toyota Prius without fixing the underlying issue?

While you can clear the code temporarily, it will likely reappear if the root cause of the problem, such as a faulty ignition coil, is not addressed.

9. How much does it cost to repair OBDII code P0351 in a 2005 Toyota Prius?

The cost of repairing code P0351 in a 2005 Toyota Prius can vary depending on the specific issue, but it may involve parts and labor costs for replacing the ignition coil or fixing wiring problems.

10. Are there any preventive measures to avoid OBDII code P0351 in a 2005 Toyota Prius?

Regular maintenance, such as timely spark plug replacements and periodic inspection of ignition components, can help prevent issues like code P0351 in a 2005 Toyota Prius.

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