PowertrainP0944
CautionSeverity: Caution - get it checked when you can
Hydraulic Pressure Unit Loss of Pressure
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 32
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P0944 | Hydraulic Pressure Unit Loss of Pressure SAE | Powertrain |
| BAIC Motor | P0944 | Insufficient clamping force Brand | Powertrain |
| Mercedes-Benz | P0944 | Hydraulic Pressure Unit Loss of Pressure SAE | Powertrain |
| BYD | P0944 | Insufficient clamping force Brand | Powertrain |
| Chery | P0944 | Hydraulic Pressure Unit Loss of Pressure Brand | Powertrain |
| Chrysler | P0944 | Loss of Hydraulic Pump Prime Brand | Powertrain |
| Daewoo | P0944 | Hydraulic Pressure Unit Loss of Pressure Brand | Powertrain |
| DFFS | P0944 | Hydraulic Pressure Unit Loss of Pressure Brand | Powertrain |
| DFFX | P0944 | Hydraulic Pressure Unit Loss of Pressure Brand | Powertrain |
| DFXK | P0944 | Hydraulic Pressure Unit Loss of Pressure Brand | Powertrain |
| EOBD | P0944 | Hydraulisk trykenhed tab af tryk Brand | Powertrain |
| Fiat | P0944 | Loss of hydraulic pump prime Brand | Powertrain |
| Geely | P0944 | Insufficient Clamping Force Brand | Powertrain |
| GM | P0944 | Hydraulic Pressure Unit Loss of Pressure Brand | Powertrain |
| Great Wall | P0944 | Clamping force insufficient Brand | Powertrain |
| Hafei | P0944 | Hydraulic Pressure Unit Loss of Pressure Brand | Powertrain |
| Holden | P0944 | Transmission Hydraulic Oil Pressure Unit Performance Brand | Powertrain |
| Honda | P0944 | Motor Oil Pump Malfunction Brand | Powertrain |
| Hyundai | P0944 | Hydraulic Pressure Unit Loss of Pressure SAE | Powertrain |
| Isuzu | P0944 | Hydraulic Pressure Unit Loss of Pressure SAE | Powertrain |
| Land Rover | P0944 | Hydraulic pressure unit loss of pressure Brand | Powertrain |
| Mitsubishi | P0944 | ELC. Oil pump functional Brand | Powertrain |
| Opel | P0944 | Hydraulic Pressure Unit Loss of Pressure Brand | Powertrain |
| Peugeot | P0944 | Hydraulic Pressure Unit Loss of Pressure SAE | Powertrain |
| Proton | P0944 | ELC. Oil pump functional Brand | Powertrain |
| Saab | P0944 | Hydraulic Pressure Unit Loss of Pressure Brand | Powertrain |
| MG (SAIC) | P0944 | Hydraulic Pressure Unit Loss of Pressure Brand | Powertrain |
| Sprinter | P0944 | Hydraulic Pressure Unit Loss of Pressure SAE | Powertrain |
| Suzuki | P0944 | Hydraulic Pressure Unit Loss of Pressure Brand | Powertrain |
| Tata | P0944 | Hydraulic Pressure Unit Loss Of Pressure Brand | Powertrain |
| Toyota | P0944 | Keyboard failure (excluding emergency and rescue call buttons) Brand | Powertrain |
| Volkswagen | P0944 | Hydraulic pump pressure loss 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 P0944 and may be reported by some scan tools.
6Related codes
Browse Pxxx codes or P094xx codes.