What the Check Engine Light Means on a Dodge Ram 1500
The Ram 1500’s check engine light warns that the powertrain control module detected a fault in ignition, fuel, emission or transmission systems. This quick guide explains what the light signifies, how to respond, and the first checks to perform.
- Solid light: A non-urgent issue; schedule diagnostics soon.
- Flashing light: Severe misfire or raw fuel in the exhaust—reduce throttle immediately and repair before driving further.
- Tools needed: OBD-II scanner, basic hand tools, smoke tester (for EVAP), spark tester.
First Steps When the Light Appears
- Read diagnostic trouble codes and save freeze-frame data.
- Check the gas cap for proper seal and inspect vacuum/EVAP hoses.
- Look for obvious issues: loose connectors, damaged wires, low coolant or oil.
- Address any flashing MIL immediately to protect the catalytic converters.
Need repair tips? Visit the Ram 1500 code guide for detailed troubleshooting.