P2E04 code meaning
Gear Lever Position Sensor B Circuit
Powertrain system Generic code P2Exx codes Check engine light
What P2E04 means
Sensor B is the second, redundant gear lever position sensor; it measures the same lever travel as sensor A so that a single failure does not leave the driver without range selection. Toyota names it gear lever position sensor B in the floor shift assembly of the Lexus NX, and GM's tables call the equivalent device sensor 2, with X and Y values of its own (P089B to P08A2). P2E04 is the general circuit fault of sensor B, set when its line is open or its signal cannot be read, with no low/high distinction. No maker documents P2E04 itself. GM's patent US9249877 describes the logic behind the pair: if a coordinate of one sensor fails its test, that sensor is ignored and the other decides. A fault here therefore removes the backup, not the function.
P2E04 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2E04
- Warning lamp or shift-system message
- Selector works normally on sensor A alone
- Any further sensor fault can block range changes
Common causes of P2E04
- Most likelyConnector or wire of sensor B at the selector loose or damaged
- PossibleSensor B in the selector assembly failed
- Less likelySeparate supply branch of sensor B interrupted
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Gear lever position sensor bWiring harnessTCM
What each part of P2E04 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 04 | The exact fault in that area. |
What to do next
- Note P2E04 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 P2E04
What does P2E04 mean?
P2E04 means "Gear Lever Position Sensor B Circuit". Sensor B is the second, redundant gear lever position sensor; it measures the same lever travel as sensor A so that a single failure does not leave the driver without range selection. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E04?
Drive gently and only to a workshop. With P2E04 the car can go into limp mode (reduced power) to protect itself.
Will P2E04 fail an emissions test?
P2E04 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P2E04 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2E04 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.