P0884 code meaning
TCM Power Input Signal Intermittent
Powertrain system Generic code P08xx codes Check engine light
What P0884 means
The TCM power input codes watch the supply voltage of the gearbox module or of its solenoid supply. Without a proper supply all solenoids go dead and the gearbox falls back to its hydraulic emergency gear with maximum line pressure: a fixed gear, harsh engagement, no shifting. Ford's external gearbox modules check a window of 9 to 16 V; GM reports the same under P0562/P0563. P0884 reports a brief loss of supply. Chrysler calls it 'power up at speed': the module notices on start-up that the vehicle is already moving, so it must have rebooted while driving. In field reports from NHTSA investigation PE07-027 on 2007 Jeeps it was stored after engine stalls, among others from an unlatched fuse box connector.
P0884 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P0884
- Gearbox jerks or briefly enters limp mode while driving
- Engine may stall with a combined powertrain module
- Warning lamps flicker
Common causes of P0884
- Most likelyLoose or unlatched connector at fuse box or module
- PossibleIgnition switch or relay with contact dropouts
- PossibleBattery terminal or ground loose
- Less likelyInternal module reset
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Transmission control moduleTransmission relayBatteryModule wiring
What each part of P0884 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 8 | Area: transmission. |
| 84 | The exact fault in that area. |
What to do next
- Note P0884 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 P0884
What does P0884 mean?
P0884 means "TCM Power Input Signal Intermittent". The TCM power input codes watch the supply voltage of the gearbox module or of its solenoid supply. It is a generic code, so it means the same on every make.
Is it safe to drive with P0884?
Drive gently and only to a workshop. With P0884 the car can go into limp mode (reduced power) to protect itself.
Will P0884 fail an emissions test?
Yes, it can. P0884 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 P0884 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P0884 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.