PowertrainP0843
CautionSeverity: Caution - get it checked when you can
Transmission Fluid Pressure Sensor/Switch A Circuit High
Key terms: SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions
1What it means in plain English
This range normally covers the transmission control system, but some manufacturers use P07-P09 codes for unrelated functions (fuel pump control, air-mix motors, lighting or windows). Check the description before assuming it is a transmission fault.
2Common causes
- Low or dirty transmission fluid
- Faulty shift solenoid
- Faulty speed sensor
- Wiring or connector fault
- Internal transmission wear
3Can I drive?
If the transmission slips, jerks, will not shift, or a transmission temperature warning is on, stop driving and let it cool: continuing can cause expensive damage. If the code names a different system (for example the fuel pump), treat it on its own terms; a fuel-pump control failure can stall the car, so have it checked before driving further. Otherwise drive gently to a workshop.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 36
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High SAE | Powertrain |
| BAIC Motor | P0843 | Transmission Fluid Pressure Sensor 'A' Circuit High Brand | Powertrain |
| Mercedes-Benz | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High SAE | Powertrain |
| BMW | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High SAE | Powertrain |
| BYD | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High Brand | Powertrain |
| Chery | P0843 | Transmission Fluid Pressure Sensor Switch 1: High Brand | Powertrain |
| Chrysler | P0843 | primary oil pressure sensor circuit high Brand | Powertrain |
| Daewoo | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High Brand | Powertrain |
| Daihatsu | P0843 | Secondary hydraulic sensor Brand | Powertrain |
| DFFS | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High Brand | Powertrain |
| DFFX | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High Brand | Powertrain |
| DFXK | P0843 | Transmission Fluid Pressure Sensor Switch 1: High Brand | Powertrain |
| EOBD | P0843 | Getriebeöldrucksensor/-schalter 'A' Stromkreis hoch Brand | Powertrain |
| Geely | P0843 | Transmission Fluid Pressure Sensor Switch 1: High Brand | Powertrain |
| GM | P0843 | Transmission pressure switch solenoid C circuit high Brand | Powertrain |
| Great Wall | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High Brand | Powertrain |
| Hafei | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High Brand | Powertrain |
| Holden | P0843 | Transmission Fluid Pressure Switch Circuit High Voltage Brand | Powertrain |
| Honda | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High SAE | Powertrain |
| Hyundai | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High SAE | Powertrain |
| Isuzu | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High SAE | Powertrain |
| Land Rover | P0843 | Transmission fluid pressure sensor/switch A -circuit high Brand | Powertrain |
| Mitsubishi | P0843 | Line pressure sensor high Brand | Powertrain |
| Opel | P0843 | Transmission pressure switch solenoid C circuit high Brand | Powertrain |
| Perodua | P0843 | Secondary hydraulic sensor Brand | Powertrain |
| Peugeot | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High SAE | Powertrain |
| Porsche | P0843 | From software version Q033, an electrical fault in pressure sensor 1 is indicated only via fault code Brand | Powertrain |
| Proton | P0843 | Line pressure sensor high Brand | Powertrain |
| Saab | P0843 | Transmission Pressure Switch Solenoid C Circuit High Brand | Powertrain |
| MG (SAIC) | P0843 | Odd Clutch Pressure Sensor Circuit High Brand | Powertrain |
| Sprinter | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High SAE | Powertrain |
| Subaru | P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High SAE | Powertrain |
| Suzuki | P0843 | Transmission Fluid Pressure Sensor / Switch 'A' Circuit High Brand | Powertrain |
| Tata | P0843 | Transmission Fluid Pressure Sensor/Switch 'A' Circuit High Brand | Powertrain |
| Toyota | P0843 | Clutch pressure sensor signal short circuit to power supply Brand | Powertrain |
| Volkswagen | P0843 | Gearbox hydraulic pressure sender 1 short to positive Brand | Powertrain |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 2
These 7-character codes are manufacturer-specific variants of P0843 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P084300 | Wert Drucksensor oberhalb des Arbeitsbereichs - berdruck Brand | Powertrain |
| Mercedes-Benz | P084311 | Ausgangsspannung Drucksensor außerhalb Toleranz (Kurzschlu nach Masse) Brand | Powertrain |
6Related codes
Browse Pxxx codes or P084xx codes.