Engine-Codes.com
Engine-Codes – Cadillac – P0302 Cadillac

P0302 Cadillac Code - Cylinder 2 Misfire Detected

Quick Answer

The P0302 diagnostic code for Cadillac signifies that the vehicle's Engine Control Unit (ECU) has detected an irregularity in the firing process within cylinder number 2. Common causes include Faulty or worn spark plugs, A malfunctioning fuel injector, Ignition coils or wires that are damaged or not functioning correctly. 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
P0302 Cadillac indicates Cylinder 2 Misfire Detected.
Common causes
Common causes include Faulty or worn spark plugs, A malfunctioning fuel injector, Ignition coils or wires that are damaged or not functioning correctly.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0302 Cadillac Description

The P0302 diagnostic code for Cadillac signifies that the vehicle's Engine Control Unit (ECU) has detected an irregularity in the firing process within cylinder number 2. This irregularity is commonly referred to as a misfire. A misfire happens when the engine cylinder fails to combust appropriately, disrupting the engine's balance and timing. The vehicle's performance is adversely affected, resulting in reduced power, poor fuel economy, and increased emissions.

OBDII Code P0302 Cadillac - Cylinder 2 Misfire Detected
P0302 Cadillac Code - Cylinder 2 Misfire Detected

Common Causes of P0302 Cadillac

  1. Faulty or worn spark plugs.
  2. A malfunctioning fuel injector.
  3. Ignition coils or wires that are damaged or not functioning correctly.
  4. A lack of compression in the cylinders.
  5. Vacuum leaks or gasket leaks.

Symptoms of P0302 Cadillac

  1. The vehicle's engine light is on or flashing.
  2. The vehicle's performance is reduced, and it operates roughly.
  3. The vehicle is difficult to start.
  4. There is an increase in fuel consumption.
  5. There is a distinct smell of gasoline from the exhaust.

How to Fix P0302 Cadillac

  1. Start with a visual inspection of the spark plugs, wires, and ignition coil. Replace any components that appear worn or damaged.
  2. Use a scan tool to check the fuel pressure. If it's too low, the fuel pump or fuel pressure regulator may need to be replaced.
  3. Perform a compression test on the cylinders. If the compression is low, further investigation is needed to identify the cause and rectify it.
  4. Check for vacuum leaks using a smoke machine or a vacuum gauge. Repair any leaks found.
  5. If all other steps fail to resolve the issue, it may be necessary to take the vehicle to a professional mechanic for further diagnosis and repair.

Cost to Fix P0302 Cadillac

The cost to repair the P0302 code can vary significantly, depending on the cause and the parts that need to be replaced. If the issue is as simple as replacing spark plugs, the cost might be around $100 to $200, including parts and labor. However, if the issue is more complex, like a faulty fuel injector or a compression issue, the cost could rise to $1000 or more. Remember, labor costs can vary between $80 and $150 per hour based on your location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. Always check local rates for a more accurate estimate.

What does this mean?

Tech Notes for P0302 Cadillac

The P0302 code means that cylinder 2 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 2. If the problem persists more tests need to be done to diagnose the problem, see "Possible Causes".



There is a Factory Service Bulletins for All 2000-2020 Cadillac Models:

2000-2020 Cadillac Factory Service Bulletin OBDII Code P0302

This Factory Service Bulletin explains how this condition may be caused by significant carbon build-up on the intake and/or exhaust valves due to fuel contamination or incomplete burning of the fuel.

Need more information about the P0302 Cadillac code?

Need more information on how to fix the P0302 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0302 Cadillac code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0302 Cadillac Code

No Frequently Asked Questions about P0302 Cadillac Code found.

Discuss the causes and fixes for P0302 Cadillac OBDII Code

Submit a New Comment

Code P0302 Cadillac comments

No comments found for this page.