Resetting the check engine light on a 2017 Ram 1500 can be done manually or with an OBD2 scanner after fixing the underlying issue. This guide walks you through safe, proven methods to clear the light and keep your truck running smoothly.
Key Takeaways
- Never ignore the check engine light – It signals real problems that can affect performance, fuel economy, and emissions.
- Always diagnose the issue first – Use an OBD2 scanner to read trouble codes before resetting the light.
- Manual reset methods work but aren’t always reliable – Disconnecting the battery or using the gas pedal trick may clear the light temporarily.
- An OBD2 scanner is the best tool – It safely clears codes and confirms the fix was successful.
- Drive cycles matter – After resetting, complete a few drive cycles so the truck’s computer can retest systems.
- Recurring lights mean ongoing problems – If the light returns, the issue wasn’t fully resolved and needs further inspection.
- Regular maintenance prevents future warnings – Keep up with oil changes, air filters, and spark plugs to avoid common triggers.
How to Reset Check Engine Light on 2017 Ram 1500
If you’ve noticed the dreaded check engine light glowing on your 2017 Ram 1500’s dashboard, you’re not alone. This warning light can appear for dozens of reasons — some minor, like a loose gas cap, and others more serious, like a failing oxygen sensor or catalytic converter issue. While it’s tempting to just make the light disappear, the real solution lies in understanding what caused it in the first place.
In this comprehensive guide, you’ll learn exactly how to reset the check engine light on your 2017 Ram 1500 — safely, effectively, and the right way. We’ll cover everything from diagnosing the root cause to using manual tricks and professional tools. By the end, you’ll know not only how to clear the light but also how to prevent it from coming back.
Let’s get started.
Why the Check Engine Light Comes On
Visual guide about How to Reset Check Engine Light on 2017 Ram 1500
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Before we dive into resetting the light, it’s important to understand why it appeared in the first place. The check engine light — also known as the malfunction indicator lamp (MIL) — is part of your truck’s onboard diagnostics system (OBD2). This system constantly monitors engine performance, emissions, and various sensors.
When something goes outside normal operating parameters, the computer stores a trouble code and turns on the light. Common causes on a 2017 Ram 1500 include:
- Loose or damaged gas cap
- Faulty oxygen (O2) sensor
- Misfiring engine (often due to bad spark plugs or coils)
- Mass airflow (MAF) sensor issues
- Evaporative emissions system leaks
- Catalytic converter problems
- Exhaust gas recirculation (EGR) valve malfunction
Ignoring the light can lead to reduced fuel efficiency, increased emissions, and even engine damage over time. So, while resetting the light is helpful, it’s only the second step — the first is figuring out what triggered it.
Step 1: Diagnose the Problem with an OBD2 Scanner
The most important step before resetting the check engine light is diagnosing the issue. You can’t fix what you don’t understand. That’s where an OBD2 scanner comes in.
An OBD2 scanner is a small handheld device that plugs into your truck’s diagnostic port — usually located under the dashboard, near the steering column. Once connected, it communicates with your truck’s computer and retrieves trouble codes.
How to Use an OBD2 Scanner on a 2017 Ram 1500
- Turn off the ignition. Make sure the engine is off and the key is removed or in the “off” position.
- Locate the OBD2 port. In the 2017 Ram 1500, it’s typically under the dashboard on the driver’s side, just above the pedals. It’s a 16-pin connector, usually black or gray.
- Plug in the scanner. Insert the scanner’s connector firmly into the port.
- Turn the ignition to “ON” (but don’t start the engine). This powers up the truck’s electrical system and allows the scanner to communicate with the computer.
- Follow the scanner’s prompts. Most scanners will ask you to select your vehicle make, model, and year. Choose “Ram” or “Chrysler,” then “1500,” and “2017.”
- Read the trouble codes. The scanner will display one or more diagnostic trouble codes (DTCs), such as P0420 (catalytic converter efficiency below threshold) or P0171 (system too lean).
- Write down the codes. Take note of all codes displayed. You can look them up online or use the scanner’s built-in code library to understand what they mean.
Once you know the cause, you can take the right steps to fix it. For example, if the code is P0455 (large evaporative leak), check your gas cap first — it might just be loose.
Recommended OBD2 Scanners for 2017 Ram 1500
Not all scanners are created equal. For a 2017 Ram 1500, you’ll want one that’s compatible with OBD2 systems and can read manufacturer-specific codes. Here are a few reliable options:
- BlueDriver Bluetooth Pro – Works with your smartphone via Bluetooth. Offers detailed code explanations, live data, and repair reports. Great for DIYers.
- Autel MaxiCOM MK808 – A professional-grade scanner with advanced diagnostics, including ABS and airbag systems. Ideal if you plan to do more than just read codes.
- INNOVATECH OBD2 Scanner – Affordable, easy-to-use, and perfect for basic code reading and clearing. Great for beginners.
Even a basic scanner costs around $20–$50 and can save you hundreds in diagnostic fees at the mechanic.
Step 2: Fix the Underlying Issue
Now that you’ve identified the problem, it’s time to fix it. Resetting the light without addressing the root cause is like turning off a smoke alarm while the house is still on fire — it doesn’t solve anything.
Here are some common fixes based on typical trouble codes:
P0455 or P0457 – Evaporative Emission System Leak
- Check the gas cap. Is it tight? Is the seal cracked or missing?
- Replace the gas cap if it’s damaged. OEM (original equipment manufacturer) caps are best — aftermarket ones may not seal properly.
- Inspect the EVAP system hoses for cracks or disconnections.
P0300–P0308 – Random or Cylinder-Specific Misfire
- Inspect spark plugs. On a 2017 Ram 1500, they should be replaced every 30,000–50,000 miles.
- Check ignition coils. A faulty coil can cause a single cylinder to misfire.
- Use a scan tool to monitor live data and see which cylinder is misfiring.
P0133 or P0153 – O2 Sensor Slow Response
- Locate the oxygen sensor(s). The Ram 1500 has multiple O2 sensors — upstream and downstream of the catalytic converter.
- Test the sensor with a multimeter or replace it if it’s old or damaged.
- O2 sensors typically last 60,000–100,000 miles.
P0420 – Catalytic Converter Efficiency Below Threshold
- This is a serious issue. The catalytic converter may be failing.
- Check for exhaust leaks or engine misfires that could damage the converter.
- Replacement is expensive ($1,000+), so confirm with a mechanic if you’re unsure.
Always use quality parts and follow torque specifications when replacing components. Improper installation can lead to new problems.
Step 3: Reset the Check Engine Light
Once the issue is fixed, you can safely reset the check engine light. There are several methods, ranging from simple tricks to using a scanner. Let’s go through each.
Method 1: Use an OBD2 Scanner (Recommended)
This is the safest and most reliable way to reset the light.
- Plug the scanner into the OBD2 port.
- Turn the ignition to “ON” (engine off).
- Navigate to the “Clear Codes” or “Erase DTCs” option on the scanner.
- Confirm the action. The scanner will send a command to the truck’s computer to clear all stored trouble codes.
- Turn off the ignition and unplug the scanner.
- Start the engine. The check engine light should be off.
If the light stays off after a few minutes of driving, the reset was successful. If it comes back, the problem wasn’t fully resolved.
Method 2: Disconnect the Battery (Manual Reset)
This method forces the truck’s computer to reset by cutting power. It’s not as precise as using a scanner, but it can work in a pinch.
- Turn off the engine and remove the key.
- Open the hood and locate the battery. The 2017 Ram 1500 has a 12-volt lead-acid battery, usually on the driver’s side.
- Use a wrench to loosen the negative (-) battery terminal clamp.
- Remove the negative cable and set it aside, making sure it doesn’t touch the terminal.
- Wait 15–30 minutes. This allows the truck’s computer (ECU) to fully discharge and reset.
- Reconnect the negative cable and tighten the clamp securely.
- Close the hood and start the engine.
Note: Disconnecting the battery may reset other systems, such as the radio presets, clock, and adaptive transmission settings. You may need to re-enter your radio code (if equipped) and drive a few miles for the transmission to relearn shift patterns.
Also, this method doesn’t always clear all codes — especially if the problem still exists. The light may return quickly.
Method 3: Drive Cycle Reset (Let It Clear Naturally)
Some trouble codes will clear on their own after a certain number of drive cycles — if the problem is fixed and doesn’t reoccur.
A drive cycle is a specific pattern of driving that allows the truck’s computer to test various systems. For the 2017 Ram 1500, a typical drive cycle includes:
- Start the engine cold and let it idle for 2–3 minutes.
- Drive at 30–40 mph for 5–10 minutes.
- Accelerate to 55–65 mph and maintain speed for 10–15 minutes.
- Decelerate without braking (coast) for 3–5 minutes.
- Repeat 2–3 times.
After completing several drive cycles (usually 3–5), the computer may automatically clear the code and turn off the light — if no faults are detected.
This method is slow and not guaranteed, but it’s free and requires no tools.
Method 4: Gas Pedal Trick (Not Recommended)
You may have heard of a “gas pedal trick” where you press the accelerator in a specific sequence to reset the light. For example:
- Turn the ignition to “ON” (engine off).
- Press the gas pedal 3 times quickly.
- Turn the ignition off.
- Start the engine.
Unfortunately, this method does **not** work on the 2017 Ram 1500. It was used on older Chrysler vehicles but is not supported on newer models with advanced OBD2 systems. Don’t waste your time — use a scanner or disconnect the battery instead.
Troubleshooting: What If the Light Comes Back?
If the check engine light returns after resetting, it means the problem wasn’t fully fixed. Here’s what to do:
Recheck the Trouble Codes
Use your OBD2 scanner to read the codes again. Are they the same? Different? New codes can give clues about related issues.
Inspect Recent Repairs
Did you replace a part but not clear the code properly? Did you install the wrong component? Double-check your work.
Look for Intermittent Issues
Some problems only occur under certain conditions — like high speed, cold weather, or heavy load. Monitor the truck’s behavior and use live data on your scanner to catch faults in real time.
Visit a Mechanic
If you’ve tried everything and the light keeps coming back, it’s time to see a professional. A certified mechanic can perform advanced diagnostics, such as checking fuel pressure, compression, or exhaust backpressure.
Preventing Future Check Engine Lights
The best way to avoid resetting the check engine light is to prevent it from coming on in the first place. Here are some maintenance tips for your 2017 Ram 1500:
- Replace spark plugs on schedule. The 5.7L HEMI V8 recommends replacement every 30,000–50,000 miles.
- Use quality fuel and additives. Top-tier gasoline with detergents helps keep fuel injectors clean.
- Check the gas cap regularly. Make sure it’s tight after every fill-up.
- Replace the air filter. A dirty air filter can cause lean codes and reduced performance.
- Keep up with oil changes. Use the recommended oil (usually 5W-20 or 5W-30) and change it every 5,000–7,500 miles.
- Inspect hoses and belts. Cracked vacuum hoses can cause EVAP leaks.
Regular maintenance not only prevents check engine lights but also extends the life of your truck.
Conclusion
Resetting the check engine light on your 2017 Ram 1500 is a straightforward process — but only after you’ve addressed the underlying issue. Start by using an OBD2 scanner to read the trouble codes, then fix the problem with the right parts and procedures. Once that’s done, clear the codes using the scanner, disconnect the battery, or complete a drive cycle.
Avoid quick fixes like the gas pedal trick — they don’t work on modern trucks. And remember: if the light comes back, the problem isn’t solved.
By following this guide, you’ll keep your Ram 1500 running smoothly, improve fuel economy, and avoid costly repairs down the road. Stay proactive, stay informed, and don’t ignore that little light on the dashboard.
Your truck will thank you.