P0351 2018 Toyota RAV4 Code - Ignition Coil 1 Primary/Secondary Circuit
Quick Answer
A Direct Ignition System (DIS) is a 1-cylinder ignition system in which each cylinder is ignited by one ignition coil assembly and one spark plug is connected to the end of each secondary wiring. 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 2018 Toyota RAV4 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.
Code P0351 2018 Toyota RAV4 Description
The Engine Control Module (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 the current supplied to the primary coil on and off. 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.
If the ECM does not receive any IGF signals despite transmitting the IGT signal, it interprets this as a fault in the igniter and stores a Diagnostic Trouble Code (DTC).
What are the Possible Causes of the DTC P0351 2018 Toyota RAV4?
- 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 2018 Toyota RAV4?
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 P0351 2018 Toyota RAV4 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 2018 Toyota RAV4 code?
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Need Help with the Code?
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Frequently Asked Questions about P0351 2018 Toyota RAV4 Code
1. What does OBDII code P0351 for a 2018 Toyota RAV4 mean?
This code indicates a problem with the Ignition Coil 1 Primary/Secondary Circuit in the vehicle's ignition system.
2. What are the common symptoms of a P0351 error code in a Toyota RAV4?
Common symptoms include engine misfires, rough idling, lack of power, and in some cases, the Check Engine Light may illuminate.
3. What are the potential causes of OBDII code P0351 in a 2018 Toyota RAV4?
The code P0351 can be triggered by issues such as a faulty ignition coil, wiring problems in the ignition coil circuit, or a damaged ECM (Engine Control Module).
4. How can I diagnose the cause of a P0351 code in my Toyota RAV4?
To diagnose a P0351 code, you can perform a visual inspection of the ignition coil and its connections, test the coil's resistance, check for damaged wires, and use a diagnostic scan tool to gather more data.
5. Can I still drive my Toyota RAV4 with a P0351 error code?
It is not recommended to drive your vehicle with a P0351 code as it can lead to further damage to the engine and other components. It is best to address the issue promptly.
6. How can I repair a P0351 error code in my 2018 Toyota RAV4?
Repairing a P0351 code typically involves replacing the faulty ignition coil, repairing any damaged wiring, or addressing any issues with the ECM as needed.
7. Is it possible to prevent OBDII code P0351 in a Toyota RAV4?
Regular maintenance, such as changing spark plugs and ignition coils at recommended intervals, can help prevent issues that may trigger a P0351 code.
8. How much does it cost to fix a P0351 error code in a Toyota RAV4?
The cost of fixing a P0351 code can vary depending on the exact cause of the issue, but it may involve parts and labor expenses ranging from $100 to $300 or more.
9. Will resetting the Check Engine Light resolve a P0351 error code in a Toyota RAV4?
While resetting the Check Engine Light may temporarily turn it off, it will not fix the underlying issue causing the P0351 code. It's essential to diagnose and address the problem to prevent further issues.
10. Can a DIY enthusiast fix a P0351 error code in a Toyota RAV4?
Depending on your skill level and access to tools, you may be able to replace the ignition coil or address wiring issues yourself. However, complex diagnostics or ECM-related problems may require professional assistance.
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