P0351 2015 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 2015 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 2015 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 2015 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 2015 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 2015 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.
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Frequently Asked Questions about P0351 2015 Toyota RAV4 Code
1. What does the OBDII code P0351 mean on a 2015 Toyota RAV4?
P0351 indicates an issue in the primary or secondary circuit of ignition coil 1, which may affect engine performance.
2. What are the common symptoms of code P0351 in a 2015 Toyota RAV4?
Symptoms include engine misfires, rough idling, reduced power, poor fuel economy, and an illuminated check engine light.
3. What causes the P0351 code in a 2015 Toyota RAV4?
Common causes include a faulty ignition coil, damaged wiring or connectors, a bad spark plug, or a malfunctioning engine control module (ECM).
4. Can I drive my 2015 Toyota RAV4 with a P0351 code?
Driving with this code is not recommended, as it can lead to poor engine performance and potential damage to other components like the catalytic converter.
5. How do I diagnose the P0351 code on a 2015 Toyota RAV4?
Diagnosis involves inspecting the ignition coil, checking for damaged wiring or connectors, testing the coil with a multimeter, and verifying ECM functionality.
6. How do I fix the P0351 code on my 2015 Toyota RAV4?
Fixes may include replacing the faulty ignition coil, repairing damaged wiring or connectors, replacing spark plugs, or reprogramming/repairing the ECM.
7. How much does it cost to fix a P0351 code on a 2015 Toyota RAV4?
Repair costs vary but typically range from $100 to $300, depending on whether the ignition coil, spark plugs, or wiring needs replacement.
8. Can a bad spark plug cause the P0351 code in a 2015 Toyota RAV4?
Yes, a bad spark plug can cause ignition coil issues, leading to the P0351 code.
9. What happens if I ignore the P0351 code on my 2015 Toyota RAV4?
Ignoring this code can result in worsening engine performance, potential damage to the catalytic converter, and higher repair costs.
10. Do I need to replace all ignition coils if I get the P0351 code on my 2015 Toyota RAV4?
It’s not always necessary to replace all coils; you can replace only the faulty one. However, replacing all coils may be advisable if they are old or have similar wear.
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