how to resolve the P0301 code in my Tesla Model S Original (2012-2020)

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0301

3 min read

580 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix P0301 cylinder 1 misfire in Tesla Model S. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code

P0301

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Allow engine to cool before opening any components.

Symptoms

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

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0301 and check for additional codes.
2
Inspect the ignition coil and spark plug for cylinder 1 for signs of wear or damage.
3
Check for vacuum leaks around the intake manifold.
4
Test the fuel injector for cylinder 1 to ensure it is functioning properly.
5
Perform a compression test on cylinder 1 to assess engine health.
6
Examine wiring and connectors related to the ignition system and fuel injector for damage.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

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 (including spark plug socket)
•Torque wrench
•Fuel injector puller
•Multimeter
•Compression gauge

Parts Required

•Spark plug (OEM specified)
•Ignition coil (for cylinder 1)
•Fuel injector (if faulty)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0301 and check for additional codes.
2
Inspect the ignition coil and spark plug for cylinder 1 for signs of wear or damage.
3
Check for vacuum leaks around the intake manifold.
4
Test the fuel injector for cylinder 1 to ensure it is functioning properly.
5
Perform a compression test on cylinder 1 to assess engine health.
6
Examine wiring and connectors related to the ignition system and fuel injector for damage.

Solution

1. Preparation

Gather all necessary tools and parts before beginning repairs.
Disconnect the negative battery terminal to ensure safety.
Allow the vehicle to cool down if recently driven.

2. Inspect and Replace Spark Plug

Remove the engine cover if applicable.
Using a socket wrench, carefully remove the spark plug from cylinder 1.
Inspect the spark plug for signs of fouling, wear, or damage.
Replace with a new spark plug that meets OEM specifications (typically NGK or Bosch).
Torque the new spark plug to the manufacturer's specified value (usually around 18 lb-ft).

3. Inspect and Replace Ignition Coil

Disconnect the electrical connector from the ignition coil on cylinder 1.
Remove the ignition coil using a socket wrench.
Inspect for cracks or damage on the coil.
Replace with a new ignition coil if necessary.
Reconnect the ignition coil connector.

4. Test and Replace Fuel Injector (if needed)

Disconnect the fuel injector connector from cylinder 1.
Using a multimeter, check the resistance of the fuel injector to ensure it is within specified range.
If faulty, remove the fuel injector using a fuel injector puller.
Replace with a new fuel injector compatible with your vehicle.
Reconnect the fuel injector connector.

5. Perform a Compression Test

Remove the spark plug from cylinder 1.
Insert a compression gauge into the spark plug hole.
Crank the engine for a few seconds and note the reading.
If compression is below the manufacturer's specifications, further investigation is needed into potential internal engine issues.