P2773 code meaning
Four Wheel Drive (4WD) Low Switch Circuit Low
Powertrain system Generic code P27xx codes Check engine light
What P2773 means
P2773 is stored when the signal line of the low-range switch stays below its permitted voltage band, typically because it is pulled to ground. No manufacturer documents P2773 publicly. Toyota shows that the fault type exists in practice but files it differently: on 2024–2025 Tacoma the short to ground appears as P2771 with failure byte 11, and bulletin T-SB-0093-25 traces it to a shift actuator damaged through the transfer case breather. Typical triggers for a low signal are chafed insulation touching the body, water in the actuator or connector, or a switch shorted internally. Unlike P2772 this is a purely electrical finding, and unlike P2774 the reading is too low rather than too high. The vehicle may ignore low range or default the 4WD system.
P2773 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 6.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2773
- 4WD indicator flashing and warning light on
- Low range cannot be selected or is reported permanently
Common causes of P2773
- Most likelySignal wire chafed through and shorted to ground
- PossibleMoisture in shift actuator or connector (Toyota Tacoma breather issue)
- PossibleLow-range switch shorted internally
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Four wd low switchWiring harness
What each part of P2773 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 7 | Area: transmission. |
| 73 | The exact fault in that area. |
What to do next
- Note P2773 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2773
What does P2773 mean?
P2773 means "Four Wheel Drive (4WD) Low Switch Circuit Low". P2773 is stored when the signal line of the low-range switch stays below its permitted voltage band, typically because it is pulled to ground. It is a generic code, so it means the same on every make.
Is it safe to drive with P2773?
Drive gently and only to a workshop. With P2773 the car can go into limp mode (reduced power) to protect itself.
Will P2773 fail an emissions test?
Yes, it can. P2773 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2773 to fix?
Difficulty: medium. A typical repair takes 0.5 to 6.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2773 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.