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Home/Cars/Tesla/Model S/Plaid/Refresh (2021-present)/why does my Tesla Model S Plaid/Refresh (2021-present) have a rough idle when cold

why does my Tesla Model S Plaid/Refresh (2021-present) have a rough idle when cold

Tesla Model S Plaid/Refresh (2021-present)

Severity: mediumDifficulty: medium1-3 hours
3 min read
508 words

Problem Statement

Learn how to diagnose and fix rough idle issues in Tesla Model S Plaid (2021-present). Step-by-step guide with diagnostic procedures and repair instructions.

Component
Electrical
Repair Time
1-3 hours

Safety Warnings

  • ⚠Disconnect the battery before working on high-voltage systems
  • ⚠Allow the vehicle to cool before inspecting the battery cooling system

Symptoms

  • •Rough idle when the vehicle is cold
  • •Unusual vibrations felt in the cabin
  • •Increased noise from the engine compartment
  • •Possible decrease in acceleration performance
  • •Intermittent warning messages on the dashboard

Diagnostic Steps

  1. 1Check the vehicle's software version and update if necessary
  2. 2Use a diagnostic tool to scan for error codes related to the powertrain or battery management system
  3. 3Inspect the battery cooling system for any obstructions or issues
  4. 4Examine the high-voltage connections and cables for any signs of wear, damage, or loose connections
  5. 5Review the vehicle's charge levels and state of health of the battery using the Tesla app or onboard diagnostics
  6. 6Conduct a visual inspection of the motor mounts and suspension components for signs of excessive wear

Solution

Solution

1. Preparation

  • Ensure the vehicle is parked on a flat surface and is in "Park" mode.
  • Gather necessary tools and parts before starting the repair process.

2. Software Update

  • Connect the vehicle to Wi-Fi.
  • Navigate to "Software" in the touchscreen menu.
  • Follow the prompts to check for and install any available updates.

3. Inspect Battery Cooling System

  • Tools Required: Torque wrench, socket set.
  • Remove the undercarriage cover to access the battery cooling system.
  • Check for debris blockages in the cooling ducts and fans.
  • Clean any obstructions with a soft brush or compressed air.

4. Examine High-Voltage Connections

  • Tools Required: Insulated socket set, multimeter.
  • Disconnect the high-voltage battery connectors (ensure the vehicle is powered off).
  • Inspect connectors for corrosion or damage, and clean as necessary.
  • Reconnect and torque to specifications provided in the service manual.

5. Motor Mount Inspection

  • Tools Required: Jack, jack stands, socket set.
  • Lift the vehicle safely using a jack and secure with jack stands.
  • Inspect motor mounts for cracks or signs of wear.
  • Replace any damaged mounts with OEM parts according to the service manual.

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
  • Torque wrench
  • Socket set
  • Insulated socket set
  • Multimeter
  • Jack
  • Jack stands

Parts Required

  • High-voltage connectors (if damaged)
  • Motor mounts (if worn)

Additional Information

Component

Electrical

Repair Time

1-3 hours

Difficulty

medium

Severity

medium

Tools

7 items

Parts

2 items

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