P2146 Nissan Code - No. 1 And 4 Cylinder Fuel Injector Power Supply Circuit Open
Quick Answer
The P2146 code for Nissan vehicles indicates a problem with the No. Common causes include Wiring harness issues (short circuit, open circuit, damaged wiring), Faulty fuel injector, Malfunctioning fuel injector driver 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
- P2146 Nissan indicates No. 1 And 4 Cylinder Fuel Injector Power Supply Circuit Open.
- Common causes
- Common causes include Wiring harness issues (short circuit, open circuit, damaged wiring), Faulty fuel injector, Malfunctioning fuel injector driver 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 P2146 Nissan Description
The P2146 code for Nissan vehicles indicates a problem with the No. 1 and 4 cylinder fuel injector power supply circuit being open. This means that there is a lack of electrical continuity in the fuel injector power supply circuit for these specific cylinders. Fuel injectors are responsible for delivering the precise amount of fuel into the combustion chamber at the right time, essential for the engine to run smoothly. When there is an issue with the power supply circuit for the fuel injectors, it can lead to a variety of performance issues.
Common Causes of P2146 Nissan
- Wiring harness issues (short circuit, open circuit, damaged wiring)
- Faulty fuel injector
- Malfunctioning fuel injector driver in the ECM
- ECM failure
Symptoms of P2146 Nissan
- Engine misfires
- Rough idling
- Hesitation during acceleration
- Reduced fuel economy
- Check engine light illuminated
How to Fix P2146 Nissan
- Begin by visually inspecting the wiring harness for any visible damage or corrosion. Repair or replace any damaged wiring as needed.
- Test the fuel injectors for functionality using a multimeter to ensure they are receiving power.
- Check the fuel injector driver in the ECM for proper operation. Replace if necessary.
- Clear the diagnostic trouble codes from the ECM and test drive the vehicle to verify that the issue has been resolved.
- If the problem persists, consider seeking professional assistance to diagnose and repair any underlying ECM issues.
Cost to Fix P2146 Nissan
The cost estimate for addressing a P2146 code on a Nissan vehicle can vary depending on the specific cause of the issue. In general, the cost of parts, such as a new fuel injector or ECM, can range from $100 to $500 or more. Labor costs at an auto repair shop can vary between $80 and $150 per hour, with the total repair time typically ranging from 1 to 2 hours. Therefore, the total repair cost could amount to anywhere from $200 to $800 or more, depending on the extent of the repairs needed. It is recommended to obtain quotes from local auto repair shops to get a more accurate estimate based on your specific vehicle and location.
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