Wrench Light: What It Means and What to Do
The Wrench Light on Ford and Lincoln vehicles is a powertrain malfunction indicator meaning the engine or transmission computer has found a fault, often in the electronic throttle or transmission.
- What it looks like
- A single open-end wrench.
- Color
- Amber/yellow on most Ford and Lincoln vehicles. On some other brands a wrench icon is a maintenance reminder instead; check your owner's manual, since symbols and colors vary by manufacturer.
Also called: Ford wrench light, powertrain malfunction light, orange wrench light, service wrench light
Updated 2026-11-07 · By CarWhere Research
Why the wrench light comes on
Ford uses the wrench to flag powertrain faults that may not be emissions-related, such as electronic throttle control, transmission, or all-wheel-drive problems. The computer may limit power or transmission operation to protect components. On some Ford models it also accompanies charging or transmission messages.
Common causes
- Electronic throttle body fault or sensor disagreement
- Accelerator pedal position sensor fault
- Transmission solenoid, sensor, or overheating fault
- Low transmission fluid
- All-wheel-drive system fault
- Charging-system or low-voltage problems
- Loose or corroded wiring connectors
What to do when the wrench light comes on
- Note whether power is reduced or shifting is abnormal.
- Pull over safely, shut the engine off, and restart to see whether it clears.
- Check whether the check engine, battery, or transmission warnings are also present.
- Have the codes read from both the engine and transmission modules.
- Inspect throttle body and transmission connectors for corrosion or damage.
- Avoid long trips or towing until it is repaired.
Symbols and colors vary by manufacturer; your owner’s manual has the exact meaning for your vehicle.
Related OBD-II codes
P2101 — Throttle Actuator "A" Control Motor Circuit Range/Performance
P2111 — Throttle Actuator "A" Control System - Stuck Open
P2112 — Throttle Actuator "A" Control System - Stuck Closed
P2135 — Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correlation
P2138 — Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Correlation
P0700 — Transmission Control System (MIL Request)
U0100 — Lost Communication With ECM/PCM "A"
P0562 — System Voltage Low
Wrench Light FAQ
What does the wrench light mean?
The Wrench Light on Ford and Lincoln vehicles is a powertrain malfunction indicator meaning the engine or transmission computer has found a fault, often in the electronic throttle or transmission.
Can I keep driving with the wrench light on?
Often the vehicle can be driven carefully, but it may be in a reduced-power or limp mode with limited acceleration or fixed gears. Drive cautiously to a shop and avoid highway merging if power is low; stop if temperature or oil warnings also appear.
What does the wrench light mean on a Ford?
It indicates a powertrain fault, most often in the electronic throttle or transmission, rather than a scheduled maintenance reminder.
Why did my Ford go into limp mode with the wrench light?
The computer limits throttle or transmission operation when it sees a fault that could affect control or cause damage. It is a protective response.
Will the wrench light go off by itself?
It may go out after a restart if the fault was momentary, but the code is stored and the light will return if the problem continues.
Other dashboard warning lights
Sources
- 49 CFR 571.101 (FMVSS No. 101) — Controls and displays: telltale symbols and colors
- NHTSA — Check for open safety recalls by VIN
General information written by CarWhere Research, not a diagnosis of your vehicle. When in doubt, stop in a safe place and follow your owner’s manual.