P099BShift Solenoid G Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Low-voltage fault, usually a short to ground, in the control circuit of shift solenoid G. Mitsubishi's 2019 service manual for a six-speed automatic uses it for the low-reverse brake shift solenoid: with transmission relay voltage at 2 V or more and the solenoid commanded on, the module sets P099B if the actual voltage stays below 3.7 V for 0.5 s. The check runs continuously; the solenoid is normally energised only in reverse and first-gear coasting. Nissan lists P099B as shift solenoid G in bulletin NTB15-037 for the 2012–2017 Versa, Versa Note and Sentra with the RE0F11A CVT and replaces the control valve when diagnosis confirms it. P099C is the high side, P09A0 the generic open.
- What you may notice
- Check engine light
- No reverse or no engine braking in first gear (Mitsubishi)
- Limp mode
- Likely causes
- LikelyControl wire shorted to ground in harness or connector
- PossibleShorted solenoid inside the valve body
- RareTransmission control module driver fault
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.