P0999 code meaning
Shift Solenoid F Control Circuit High
Powertrain system Generic code P09xx codes Check engine light
What P0999 means
High-voltage fault in the control circuit of shift solenoid F, from a short to voltage or, where the driver uses a pull-up, an open coil or wire. Nissan's bulletin NTB15-037 for the 2012–2017 Versa, Versa Note and Sentra with the RE0F11A CVT names P0999 together with P0998 as shift solenoid F and calls for replacing the control valve rather than the whole CVT when diagnosis confirms the fault. Mitsubishi's 2019 six-speed assigns P0998/P0999 to the low clutch shift solenoid; for its sister valve G it detects an open circuit as a high reading. Other makers handle F elsewhere: Genesis under P2709, Ford's summaries stop at solenoid E. CARB requires output circuit checks. P0998 is the low side.
P0999 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0999
- Check engine light
- Limp mode or loss of a gear range
- Harsh shifts
Common causes of P0999
- Most likelyOpen solenoid coil inside the valve body
- PossibleOpen control wire or short to voltage
- PossibleConnector pin pushed out or corroded
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Shift solenoid fWiring harnessTCM
What each part of P0999 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 9 | Area: transmission. |
| 99 | The exact fault in that area. |
What to do next
- Note P0999 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 P0999
What does P0999 mean?
P0999 means "Shift Solenoid F Control Circuit High". High-voltage fault in the control circuit of shift solenoid F, from a short to voltage or, where the driver uses a pull-up, an open coil or wire. It is a generic code, so it means the same on every make.
Is it safe to drive with P0999?
Drive gently and only to a workshop. With P0999 the car can go into limp mode (reduced power) to protect itself.
Will P0999 fail an emissions test?
Yes, it can. P0999 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 P0999 to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0999 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.