This guide teaches you how to reset your check engine light using the Torque Pro app on your smartphone. You’ll learn the right tools, steps, and safety tips to clear codes safely—without a mechanic.
Key Takeaways
- Use Torque Pro with an OBD2 Bluetooth adapter: This app and hardware combo lets you read and clear engine codes from your phone.
- Only reset the light after fixing the issue: Clearing the light without repairs may cause it to return or hide serious problems.
- Ensure your vehicle is OBD2-compliant: Most cars made after 1996 support OBD2 diagnostics and work with Torque.
- Follow the correct sequence: Connect the adapter, open Torque, scan for codes, review them, then clear—don’t skip steps.
- Verify the reset worked: Drive your car for a short trip and check if the light stays off.
- Keep a code log: Screenshot or note down codes before clearing them for future reference.
- Not all codes can be cleared instantly: Some require drive cycles or professional tools—don’t panic if the light returns.
How to Reset Check Engine Light Using Torque
If your car’s check engine light is on, it can be stressful—especially if you’re not sure what’s wrong. While some issues need a mechanic, many common problems can be diagnosed and even resolved at home. One of the most effective tools for this is the Torque Pro app, paired with an OBD2 Bluetooth adapter. This guide will walk you through how to reset your check engine light using Torque—safely, correctly, and without spending money at the shop.
You’ll learn what tools you need, how to connect them, how to read trouble codes, and how to clear them. We’ll also cover important safety tips, troubleshooting advice, and what to do if the light comes back on. By the end, you’ll feel confident using Torque to manage your vehicle’s diagnostics like a pro.
What Is the Check Engine Light?
The check engine light—also called the malfunction indicator lamp (MIL)—is part of your car’s onboard diagnostics system. When the engine control unit (ECU) detects a problem with the engine, emissions, or related systems, it triggers the light to alert you.
It doesn’t always mean a major repair is needed. Sometimes, it’s something simple like a loose gas cap. But ignoring it can lead to reduced fuel efficiency, increased emissions, or even engine damage.
That’s why it’s important to diagnose the issue first before resetting the light. Simply clearing the code without fixing the problem is like turning off a fire alarm while the fire still burns.
What Is Torque Pro?
Torque Pro is a powerful Android app designed to work with OBD2 (On-Board Diagnostics, version 2) systems. It allows you to connect your smartphone to your car’s computer using a Bluetooth OBD2 adapter.
Once connected, Torque Pro can:
– Read diagnostic trouble codes (DTCs)
– Display real-time engine data (RPM, coolant temp, fuel pressure, etc.)
– Clear check engine lights
– Log performance data
– Monitor emissions readiness
It’s widely used by DIYers, car enthusiasts, and even some mechanics because it’s affordable, easy to use, and highly customizable.
What You’ll Need
Before you begin, gather these items:
1. Android Smartphone or Tablet
Torque Pro is only available on Android devices. iPhones are not supported due to Apple’s Bluetooth limitations.
2. OBD2 Bluetooth Adapter
This small device plugs into your car’s OBD2 port (usually under the dashboard near the steering wheel). Look for models like:
– OBDLink MX+
– BAFX Products Bluetooth OBD2 Scanner
– Veepeak OBDCheck BLE
Make sure it’s compatible with Torque Pro and supports Bluetooth 4.0 (BLE) for best performance.
3. Torque Pro App
Download it from the Google Play Store. The free version (Torque Lite) has limited features. For full functionality—including clearing codes—you’ll need the paid version (around $5).
4. A Compatible Vehicle
Most gasoline-powered cars and light trucks made after 1996 in the U.S., and after 2001 in Europe, are OBD2-compliant. Diesel vehicles and older models may not work.
Step-by-Step Guide: How to Reset Check Engine Light Using Torque
Now that you have everything ready, let’s go through the process step by step.
Step 1: Locate the OBD2 Port
The OBD2 port is usually found under the dashboard, near the driver’s side knee area. It’s a 16-pin connector, often black or gray.
Common locations:
– Under the steering column
– Behind a small panel
– Near the fuse box
If you can’t find it, check your owner’s manual or search online for your car’s make and model.
Step 2: Plug in the OBD2 Adapter
Turn off the ignition. Plug the Bluetooth adapter into the OBD2 port. It should fit snugly—no force needed.
Wait a few seconds for the adapter to power up. You’ll usually see a blinking light indicating it’s ready.
Step 3: Turn On the Ignition
Turn the key to the “ON” position (but don’t start the engine yet). This powers up the car’s computer and allows the adapter to communicate with it.
Leave the engine off for now.
Step 4: Open Torque Pro on Your Phone
Launch the Torque Pro app. The first time you open it, it may ask for permissions—allow access to Bluetooth and location (needed for Bluetooth pairing).
Step 5: Pair the Adapter with Your Phone
Go to your phone’s Bluetooth settings and pair with the OBD2 adapter. The name usually appears as something like “OBDII” or “BLE Scanner.”
Enter the PIN if prompted (common defaults are 1234 or 0000).
Once paired, return to the Torque app.
Step 6: Connect Torque to the Adapter
In Torque Pro, tap the menu (three lines) and select “OBD2 Adapter Settings.”
Choose your adapter from the list. The app will attempt to connect. If successful, you’ll see a green status indicator.
If it fails:
– Make sure the ignition is on
– Check that the adapter is plugged in
– Restart the app and try again
Step 7: Read the Trouble Codes
Now it’s time to see what’s causing the check engine light.
Tap the “Diagnostic Trouble Codes” or “DTCs” button in the app.
Torque will scan the ECU and display any stored codes. These look like P0300, P0420, etc.
Each code corresponds to a specific issue. For example:
– P0300 = Random/Multiple Cylinder Misfire
– P0420 = Catalyst System Efficiency Below Threshold
Tap on a code to see a brief description. You can also search the code online for more details.
Step 8: Fix the Underlying Problem
This step is critical. Do not reset the light yet unless you’ve fixed the issue.
For example:
– If the code is P0455 (large EVAP leak), check your gas cap. Tighten it or replace it if damaged.
– If it’s P0171 (system too lean), inspect for vacuum leaks or dirty mass airflow sensor.
– If it’s P0301 (cylinder 1 misfire), check spark plugs, ignition coils, or fuel injectors.
Some fixes are simple. Others may require tools or professional help. Never ignore a code just to clear the light.
Step 9: Clear the Check Engine Light
Once the problem is resolved, you can reset the light.
In Torque Pro, go back to the DTCs screen.
Tap the “Clear DTCs” or “Erase Codes” button.
Confirm the action when prompted.
The app will send a command to the ECU to clear all stored trouble codes.
Step 10: Verify the Reset
After clearing the codes:
– Turn off the ignition.
– Wait 10–15 seconds.
– Turn the ignition back on.
Check if the check engine light is off. If it is, great! The reset worked.
If the light is still on, it may mean:
– The problem wasn’t fully fixed
– The ECU hasn’t completed a drive cycle
– There’s a persistent issue
Step 11: Take a Test Drive
Start the engine and drive your car for 10–15 minutes. This allows the ECU to run self-tests and confirm everything is working.
After the drive, check if the light remains off. If it stays off, the reset was successful.
If it comes back on, re-scan for codes. The same or new codes may appear, indicating an ongoing issue.
Tips for Success
1. Always Fix the Problem First
Resetting the light without repairs is like putting a bandage on a broken bone. The issue will likely return—and possibly worsen.
2. Keep a Code Log
Before clearing codes, take a screenshot or write them down. This helps if the problem returns or if you need to show a mechanic.
3. Use a Quality Adapter
Cheap adapters may disconnect or fail to communicate properly. Invest in a reliable model for consistent results.
4. Update Torque Pro Regularly
New updates improve compatibility and add features. Check the Play Store for updates every few months.
5. Don’t Panic If the Light Returns
Some codes require multiple drive cycles to clear. Others may indicate intermittent issues. Monitor the situation and re-scan if needed.
Troubleshooting Common Issues
Torque Won’t Connect to the Adapter
– Ensure Bluetooth is on and the adapter is paired.
– Restart the app and phone.
– Try a different OBD2 port location.
– Test the adapter with another app (like OBD2 Auto Doctor).
Check Engine Light Won’t Clear
– The problem may not be fully resolved.
– Some codes (like P0420) require specific drive cycles to reset.
– The ECU may need time to relearn parameters after repairs.
Codes Keep Coming Back
– This suggests a recurring or unresolved issue.
– Re-inspect the repair.
– Consider professional diagnosis if DIY fixes don’t work.
Adapter Gets Hot or Disconnects
– Unplug it when not in use.
– Avoid leaving it plugged in overnight.
– Use a powered USB hub if using a wired adapter.
When to See a Mechanic
While Torque Pro is powerful, it has limits. See a professional if:
– The check engine light is flashing (indicates a severe misfire)
– You’re getting complex codes (like transmission or ABS issues)
– The problem involves internal engine damage
– You’re uncomfortable performing repairs
A mechanic has advanced tools and expertise to handle serious problems safely.
Safety and Legal Considerations
Don’t Drive with a Flashing Light
A flashing check engine light means there’s an active misfire that can damage the catalytic converter. Pull over and get help.
Emissions Testing
In some states, clearing codes before an emissions test is illegal. The ECU must complete drive cycles and show “ready” status for all monitors.
Battery Disconnection Warning
Avoid disconnecting the battery to reset the light. This can cause radio codes, ECU resets, and other issues. Use Torque instead.
Final Thoughts
Resetting your check engine light using Torque Pro is a smart, cost-effective way to manage your car’s health. With the right tools and a little know-how, you can diagnose issues, clear codes, and keep your vehicle running smoothly.
Remember: always fix the problem before clearing the light. Torque is a diagnostic tool, not a magic fix. Use it wisely, stay safe, and enjoy the confidence that comes with understanding your car.