how to fix Ram 1500 DT (2019-Present) check engine light staying on

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the engine is cool before starting repairs.

2. Address Error Codes

• Using the OBD-II scanner, read the error codes and note them down.
• Research each code to determine the specific components that may need attention.

3. Replace Faulty Components

• For damaged spark plugs or ignition coils:

  • Remove the engine cover (if applicable).
  • Disconnect the ignition coil connectors.
  • Remove the bolts securing the coils, then lift them out.
  • Replace with new coils and plugs, ensuring proper torque (typically 10-15 lb-ft for coils).

• For faulty sensors (e.g., O2 sensor, MAF sensor):

  • Locate the sensor based on the error code.
  • Disconnect the sensor connector.
  • Remove the sensor using appropriate tools (usually a wrench or socket).
  • Install the new sensor and reconnect the wiring.

4. Check and Replace Exhaust Components

• Inspect the exhaust system for leaks or blockages.
• If necessary, replace any damaged gaskets or pipes using exhaust sealant where applicable.
• Ensure all connections are tight and secure.

5. Clear Codes and Reconnect Battery

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any stored error codes.
• Start the engine and monitor for the check engine light.