Symptoms
- Shifter won't move out of park even with the brake pressed
- No response when pressing the shift lock release button
- Push-button start models may show a warning about shifting
- Brake lights may or may not be working
Likely causes
- CommonBrake shift interlock not sensing the brake pedalThis safety feature requires the brake pedal to be pressed, sensed by a switch, before allowing a shift out of park.
- CommonBlown fuse for the shift interlock or brake lightsA blown fuse can disable the interlock solenoid or the brake light switch it depends on.
- CommonFaulty brake light switchThis switch tells the shift interlock the brake is pressed; if it fails, the interlock won't release.
- PossibleDead key fob battery (push-button start)Some systems require fob communication to release the shifter.
- PossibleFailed shift interlock solenoidThe solenoid itself can fail electrically or mechanically.
What to do
- Press the brake pedal firmly while trying to shift, and check that the brake lights work when you do (have someone look, or check reflections at night).
- Check the owner's manual for the manual shift-lock release, usually a small slot near the shifter that lets you override the interlock with the ignition key.
- Check the fuse box for a blown fuse related to the shift interlock or brake lights, and replace it if the same rating fuse is blown.
- Replace the key fob battery if the vehicle uses push-button start and isn't detecting the fob.
- Use the manual override only to move the vehicle if truly necessary; don't rely on it as a long-term fix.
- Have a mechanic diagnose the brake light switch or shift interlock solenoid if fuses and the fob aren't the issue.
- Get the underlying electrical fault repaired rather than repeatedly using the manual override.
Tools and parts
- Fuse puller/tester
- Owner's manual
- Small flathead screwdriver (for override slot)
Brake light switchSearch: “brake light switch [make model year]”
When to call a pro
See a mechanic if the fuse and brake light switch aren't the cause, since a failed shift interlock solenoid needs proper diagnosis and replacement.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.