my Cadillac Escalade T1XX (2021-Present) has a P0302 code what does it mean

Symptoms

• Check engine light illuminated
• Rough idle or engine shaking
• Decreased engine performance or power
• Poor fuel economy
• Increased emissions
• Engine stalling during acceleration

Diagnostic Steps

1. Scan the vehicle with an OBD-II scanner to confirm the P0302 code and check for any additional trouble codes.
2. Inspect the spark plug and ignition coil for cylinder 2 for signs of wear or damage.
3. Check the fuel injector for cylinder 2 to ensure it is functioning properly and not clogged.
4. Perform a compression test on cylinder 2 to rule out mechanical issues such as a blown head gasket or valve problems.
5. Inspect the wiring and connectors related to the ignition system and fuel injector for damage or corrosion.
6. Verify the engine's vacuum levels to check for any leaks that may affect performance.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug and Ignition Coil for Cylinder 2

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the engine cover if necessary.
• Locate the ignition coil for cylinder 2 (refer to the engine diagram).
• Unplug the electrical connector from the ignition coil.
• Remove the ignition coil retaining bolts and take out the coil.
• Remove the spark plug using the spark plug socket.
• Inspect the old spark plug for signs of wear or fouling.
• Install the new spark plug and torque it to the manufacturer's specifications (typically 20-25 lb-ft).
• Apply dielectric grease to the terminal of the new ignition coil and reinstall it, securing with bolts and reconnecting the electrical connector.

3. Inspect and Clean/Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector puller, cleaning solution (if cleaning), replacement fuel injector.
• Relieve fuel pressure by removing the fuel pump fuse and running the engine until it stalls.
• Disconnect the fuel lines and electrical connectors from the fuel injector for cylinder 2.
• Remove the fuel injector from the fuel rail.
• If cleaning, soak the injector in cleaning solution and use compressed air to blow through it.
• If replacing, install the new injector ensuring proper O-ring seating and reconnecting the lines.