BMW Diagnostic Trouble Code P1315 - BMW - Cylinder 2 - Injector Circuit High

Code Definition: P1315 - Cylinder 2 - Injector Circuit High

The P1315 code is a specific trouble code that indicates a high voltage reading in the injector circuit for cylinder 2. This code is typically triggered by a faulty fuel injector or a problem with the associated wiring or electrical components.

Possible Causes:

• Faulty fuel injector
• Damaged or worn-out fuel injector driver
• Faulty fuel pressure regulator
• Clogged or dirty fuel filter
• Faulty fuel pump
• Worn-out or damaged spark plugs
• Ignition coil failure
• Faulty camshaft position sensor
• Faulty crankshaft position sensor

Symptoms:

• Illuminated check engine light
• Rough engine idle
• Misfires or pinging noise from the engine
• Reduced power and performance
• Poor fuel economy
• Difficulty starting the engine

Diagnostic Procedure:

1. Use a scan tool to retrieve the trouble code and view the freeze frame data to determine when the code was set and under what operating conditions.
2. Check the fuel injector and its connections for any signs of damage or wear.
3. Inspect the fuel pressure regulator and fuel filter for any blockages or contamination.
4. Test the fuel pump and fuel delivery system to ensure they are functioning properly.
5. Check the spark plugs and ignition coils for any signs of wear or damage.
6. Verify proper operation of the camshaft and crankshaft position sensors.
7. Perform a compression test to rule out any mechanical issues with the engine.
8. If the problem persists, consider replacing the faulty component(s).
9. Clear the code and perform a road test to verify the repair.

Repair Information:

1. Replace the faulty fuel injector.
2. Replace the fuel pressure regulator or fuel filter if necessary.
3. Replace the faulty fuel pump or fuel delivery system component.
4. Replace the worn-out or damaged spark plugs.
5. Replace the ignition coil or ignition module.
6. Replace the camshaft position sensor or crankshaft position sensor if necessary.
7. Perform any necessary repairs to the engine's mechanical components.
8. Clear the code and perform a road test to verify the repair.

It's important to note that this is a general guide and the exact repair procedure may vary depending on the year, make, and model of your BMW. Always consult a professional mechanic if you're unsure about how to diagnose or repair an issue with your vehicle.************************ **************