my Volkswagen Golf MK7.5 (2020-Present) remote start is not working, what should I do?

Volkswagen Golf MK7.5 (2020-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

485 words

Problem Statement

Learn how to diagnose and fix the remote start issue in a 2020 Volkswagen Golf MK7.5. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the vehicle battery before working on electrical components to avoid shorts or shocks.

Symptoms

•Remote start button does not activate the engine
•Check engine light illuminated
•Key fob battery may be weak or dead
•Vehicle does not respond to key fob commands
•Security system warning light is flashing

Diagnostic Steps

1
Check the key fob battery and replace if necessary.
2
Verify that the vehicle is in a suitable condition for remote start (e.g., doors closed, vehicle in park).
3
Scan for error codes using an OBD-II scanner to identify any underlying issues.
4
Inspect the vehicle's battery voltage to ensure it is sufficiently charged.
5
Test the remote start feature using a secondary key fob if available to rule out a faulty fob.

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
•Multimeter
•Replacement key fob battery
•Flathead screwdriver

Parts Required

•Key fob battery (CR2032)

Related Faults

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Diagnostic Steps

1
Check the key fob battery and replace if necessary.
2
Verify that the vehicle is in a suitable condition for remote start (e.g., doors closed, vehicle in park).
3
Scan for error codes using an OBD-II scanner to identify any underlying issues.
4
Inspect the vehicle's battery voltage to ensure it is sufficiently charged.
5
Test the remote start feature using a secondary key fob if available to rule out a faulty fob.

Solution

1. Preparation

Gather tools: OBD-II scanner, multimeter, replacement key fob battery, and a flathead screwdriver.
Ensure the vehicle is parked on a level surface and the ignition is off.

2. Check Key Fob Battery

Use a flathead screwdriver to carefully open the key fob.
Remove the old battery and replace it with a new one (typically a CR2032).
Reassemble the key fob and test the remote start function again.

3. Inspect Vehicle Battery

Use a multimeter to check the voltage of the vehicle battery; it should read around 12.6 volts or higher.
If the voltage is low, recharge or replace the battery as necessary.

4. Scan for Error Codes

Connect the OBD-II scanner to the vehicle’s diagnostic port.
Turn the ignition to the "On" position without starting the engine.
Retrieve and note any error codes present in the system. Research the codes to determine if they relate to the remote start system.

5. Reset Security System (if applicable)

If a security system issue is detected, follow the manufacturer’s instructions to reset the system, which may involve disconnecting the battery for a few minutes and reconnecting it.