Remote start on your 2019 Buick Enclave provides the convenience of warming or cooling your vehicle before entering, but when this feature fails, you're left pressing the button with no response. Understanding the conditions required for remote start operation helps diagnose why the system may not be functioning.
Remote Start System Requirements
The Enclave's remote start only functions when specific conditions are met: the hood must be closed, all doors properly latched, transmission in Park, vehicle not in valet mode, no check engine light illuminated, and adequate fuel level. The system performs these checks before allowing remote start, and failure of any condition silently prevents operation without obvious warning.
Key Fob Signal and Battery Issues
Remote start requires strong key fob signal transmission. Weak key fob batteries reduce range and reliability. Interference from other wireless devices, buildings, or terrain can block signals. The fob must be within range, typically 200 feet under ideal conditions but often less in real-world scenarios. Try starting from closer range before suspecting vehicle issues.
Check Engine Light Prevention
Any illuminated check engine light disables remote start as a safety precaution, even for minor emission codes. Loose gas caps triggering evaporative system codes are a common culprit. Scan for stored codes—some may illuminate the light without obvious warning to the driver. Addressing the underlying code restores remote start capability.
Hood Latch Switch Problems
The hood latch switch tells the system the hood is closed. A faulty switch falsely indicating an open hood prevents remote start for safety reasons. These switches can fail or become misadjusted. Inspect the switch mechanism and test with a scan tool to verify proper hood status reporting.
Code P1690 and Security System
Code P1690 relates to the transponder key system that validates the key fob before allowing engine start. If the security system doesn't recognize the key fob properly, remote start fails. This can result from fob programming loss, weak fob battery affecting transponder communication, or security module issues.
Remote Start Then Immediate Shutdown
If the engine starts remotely then immediately shuts off, a condition checked after startup may be failing. Some vehicles verify key presence again after starting—security communication issues can cause immediate shutdown. Fuel level sensor errors can also trigger shutdown if the system believes fuel is critically low.