What does the wrench warning light mean?
What does the wrench warning light mean? powertrain malfunction indicator light The wrench warning light on Ford vehicles is the powertrain malfunction indicator light. When it illuminates, it means that the computer has detected an issue with your vehicle's powertrain or four-wheel-drive system. Is it safe to drive with a wrench light on? It is not safe to drive. The wrench light indicates something is wrong with your power train. That's a bit overkill. By Federal Safety Standards, a red light means immediate service is required, a yellow light means service is required, but nothing is unsafe. Waldo, or anyone,...