PowertrainP1133
CautionSeverity: Caution - get it checked when you can
HO2S Insufficient Switching (Bank 1 Sensor 1)
Key terms: Control module: a small computer that runs one part of the car · Bank 1: the side of the engine containing cylinder 1 · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions
1What it means in plain English
The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.
2Common causes
- Sensor or actuator fault
- Wiring or connector fault
- Vacuum or intake leak
- Fuel or ignition problem
- Control module fault
3Can I drive?
Have it diagnosed promptly. If the car runs and drives normally, drive gently to a workshop. If it runs badly, stalls, overheats, loses oil pressure, or a warning light is flashing or red, stop safely and get professional help. If the code concerns the brakes, brake vacuum or brake assist, do not drive until it is checked: a hard pedal or longer stopping distance means stop.
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 29
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P1133 | HO2S Insufficient Switching (Bank 1 Sensor 1) SAE | Powertrain |
| BAIC Motor | P1133 | Upstream oxygen sensor response too slow Brand | Powertrain |
| BMW | P1133 | DME: Heat output, ox.sensor before cat.conv., bank 2 Brand | Powertrain |
| BYD | P1133 | NO. 308 battery voltage sampling wire loop fault Brand | Powertrain |
| Chery | P1133 | Brake vacuum booster pump control circuit open Brand | Powertrain |
| Daewoo | P1133 | bank1 Fuel Ctrl Shifted Lean Brand | Powertrain |
| Daihatsu | P1133 | Backspring off Brand | Powertrain |
| DFFS | P1133 | Upstream oxygen sensor response too slow Brand | Powertrain |
| DFFX | P1133 | Throttle position 1 rationality Brand | Powertrain |
| DFXK | P1133 | Front oxygen response too slow Brand | Powertrain |
| EOBD | P1133 | A/C EVAP temperature sensor Brand | Powertrain |
| Geely | P1133 | Oxygen (Lambda) Sensor Heating: B1&B2 S1: Heating Circuit Elect. Malfunction Brand | Powertrain |
| GM | P1133 | Bank 1 Fuel Ctrl Shifted Lean Brand | Powertrain |
| Holden | P1133 | HO2S Insufficient Switching Sensor 1 Brand | Powertrain |
| Hyundai | P1133 | HO2S Insufficient Switching (Bank 1 Sensor 1) SAE | Powertrain |
| Isuzu | P1133 | HO2S Insufficient Switching (Bank 1 Sensor 1) SAE | Powertrain |
| Land Rover | P1133 | HO2S Insufficient Switching (Bank 1 Sensor 1) SAE | Powertrain |
| Mahindra | P1133 | HO2S Insufficient Switching (Bank 1 Sensor 1) SAE | Powertrain |
| Mitsubishi | P1133 | Module1(Cell7) harness Open Brand | Powertrain |
| Opel | P1133 | Bank 1 Fuel Ctrl Shifted Lean Brand | Powertrain |
| Perodua | P1133 | Backspring off Brand | Powertrain |
| Peugeot | P1133 | HO2S Insufficient Switching (Bank 1 Sensor 1) SAE | Powertrain |
| Porsche | P1133 | Lambdaregeladaption unterer Lastbereich Bank 2: oberer Grenzwert überschritten Brand | Powertrain |
| Proton | P1133 | Module1(Cell7) harness Open Brand | Powertrain |
| Saab | P1133 | Bank 1 Fuel Ctrl Shifted Lean Brand | Powertrain |
| Subaru | P1133 | HO2S Insufficient Switching (Bank 1 Sensor 1) SAE | Powertrain |
| Suzuki | P1133 | VARI SWL CON/SV-B2 Brand | Powertrain |
| Tata | P1133 | Up-Stream Oxygen Sensor Fault - Gas Mode Brand | Powertrain |
| Toyota | P1133 | Inconsistency of position/pressure of throttle 1 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 4
These 7-character codes are manufacturer-specific variants of P1133 and may be reported by some scan tools.
6Related codes
Browse Pxxx codes or P113xx codes.