P0358 Lexus Code - Ignition Coil 8 Primary/Secondary Circuit Malfunction
Quick Answer
The P0358 diagnostic trouble code (DTC) for Lexus vehicles indicates an issue with the ignition coil 8 primary/secondary circuit. Common causes include Faulty ignition coil, Wiring harness issues, Problems with the ignition coil driver circuit in the 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
- P0358 Lexus indicates Ignition Coil 8 Primary/Secondary Circuit Malfunction.
- Common causes
- Common causes include Faulty ignition coil, Wiring harness issues, Problems with the ignition coil driver circuit in the 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.
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Code P0358 Lexus Description
The P0358 diagnostic trouble code (DTC) for Lexus vehicles indicates an issue with the ignition coil 8 primary/secondary circuit. 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 ignite the air-fuel mixture in the engine's combustion chamber. In this case, the code specifically points to a malfunction in the primary or secondary circuit of ignition coil 8.
Common Causes of P0358 Lexus
- Faulty ignition coil
- Wiring harness issues
- Problems with the ignition coil driver circuit in the ECM
- Damaged ECM
- Corrosion or loose connections in the circuit
Symptoms of P0358 Lexus
- Engine misfires
- Rough idling
- Loss of power during acceleration
- Poor fuel economy
- Difficulty starting the vehicle
How to Fix P0358 Lexus
- Begin by diagnosing the specific cause of the ignition coil 8 primary/secondary circuit malfunction using a diagnostic scanner to pinpoint the exact issue.
- Inspect the wiring harness for any signs of damage, corrosion, or loose connections. Repair or replace any damaged wiring as needed.
- Test the ignition coil 8 to determine if it is functioning correctly. Replace the ignition coil if it is found to be faulty.
- Check the ignition coil driver circuit in the ECM for any faults. Repair or replace the ECM if necessary.
- Clear the DTC and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P0358 Lexus
The typical repair costs for addressing an ignition coil 8 primary/secondary circuit malfunction can range from $150 to $400, including parts and labor. However, the 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. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.
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