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Home/Cars/Honda/Accord/8th Generation (2008-2012)/my Honda Accord 8th Generation (2008-2012) engine light is on after oil change

my Honda Accord 8th Generation (2008-2012) engine light is on after oil change

Honda Accord 8th Generation (2008-2012)

Severity: mediumDifficulty: mediumError Code: P04201-2 hours
3 min read
565 words

Problem Statement

Learn how to diagnose and fix the check engine light issue after an oil change in Honda Accord 8th Generation. Step-by-step guide with solutions.

Error Code
P0420
Component
Engine
Repair Time
1-2 hours

Safety Warnings

  • ⚠Allow the engine to cool before attempting any repairs.
  • ⚠Be cautious when working around hot engine components and oil.

Symptoms

  • •Check engine light illuminated
  • •Possible oil leak under the vehicle
  • •Engine running rough or misfiring
  • •Decreased fuel efficiency
  • •Unusual engine noises (ticking or knocking)

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to identify specific trouble codes.
  2. 2Inspect the oil level and condition to ensure it is at the correct level and is the proper type.
  3. 3Check for any visible oil leaks around the oil filter and drain plug.
  4. 4Examine the oil filter to ensure it was installed correctly and is not damaged.
  5. 5Inspect the air intake system and ensure it was not disconnected or damaged during the oil change.
  6. 6Verify that the gas cap is securely tightened, as a loose cap can trigger the check engine light.

Solution

Solution

1. Preparation

  • Gather tools and parts: OBD-II scanner, socket set, new oil filter (if necessary), oil, clean rags.
  • Ensure the vehicle is parked on a level surface and the engine is cold.

2. Retrieve and Address Error Codes

  • Use the OBD-II scanner to pull error codes from the vehicle’s computer.
  • Record any codes related to engine functionality (e.g., P0420 for catalytic efficiency).
  • Address any specific issues indicated by the codes.

3. Inspect and Replace Oil Filter (if necessary)

  • If the oil filter is found to be leaking or improperly installed:
    • Remove the oil filter: Use an oil filter wrench to loosen the filter.
    • Prepare new filter: Apply a thin layer of fresh oil to the rubber gasket of the new filter.
    • Install new filter: Hand-tighten the new filter in place, ensuring it’s secure but not overly tight.

4. Check and Adjust Oil Level

  • Check oil level: Remove the dipstick, wipe it clean, reinsert, and remove again to check oil level.
  • If low, add oil as specified in the owner’s manual (typically 0W-20 or 5W-20).
  • Ensure no overfilling occurs, as this can damage the engine.

5. Reconnect Components

  • If any air intake components were disturbed, reconnect or replace as necessary.
  • Make sure all connections are secure.

6. Clear Error Codes

  • After resolving the issues, use the OBD-II scanner to clear any error codes.
  • Confirm the check engine light is off and monitor for any reoccurrence.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Socket set
  • Oil filter wrench
  • Clean rags

Parts Required

  • New oil filter (if necessary)
  • Engine oil (as per manufacturer specifications)

Additional Information

Error CodeP0420
Component

Engine

Repair Time

1-2 hours

Difficulty

medium

Severity

medium

Tools

4 items

Parts

2 items

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