PowertrainP0173
CautionSeverity: Caution - get it checked when you can
Fuel Trim (Bank 2)
Key terms: Oxygen sensor: measures oxygen in the exhaust gas · Mass air flow sensor: measures the air going into the engine · Bank 2: the side of the engine containing cylinder 2 · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions
1What it means in plain English
This code is in the fuel, air and oxygen sensor range, which also includes coolant temperature faults.
2Common causes
- Dirty or faulty mass air flow sensor
- Vacuum or intake air leak
- Weak fuel pump or clogged fuel filter
- Faulty fuel injector
- Faulty oxygen sensor
- Wiring or connector fault
3Can I drive?
Have it diagnosed if the engine runs badly or the code keeps returning. Because this range includes coolant temperature sensors, watch the temperature gauge: if it climbs into the red, or the engine overheats or stalls, stop safely and get professional help.
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 34
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P0173 | Fuel Trim (Bank 2) SAE | Powertrain |
| BAIC Motor | P0173 | Fuel Trim Bank 2 Brand | Powertrain |
| Mercedes-Benz | P0173 | Fuel Trim (Bank 2) SAE | Powertrain |
| BMW | P0173 | DME: Fuel trim bank 2 control limit Brand | Powertrain |
| BYD | P0173 | Fuel trim Brand | Powertrain |
| Chery | P0173 | Fuel trim Brand | Powertrain |
| Chrysler | P0173 | Fuel system 2/1 lean control below limit Brand | Powertrain |
| Daewoo | P0173 | Fuel Trim Bank 2 Brand | Powertrain |
| DFFS | P0173 | Fuel Trim Bank 2 Brand | Powertrain |
| DFFX | P0173 | Fuel trim Brand | Powertrain |
| DFXK | P0173 | Fuel Trim Bank 2 Brand | Powertrain |
| EOBD | P0173 | Fuel trim bank 2 Brand | Powertrain |
| Geely | P0173 | Fuel trim Brand | Powertrain |
| GM | P0173 | Fuel Trim Bank 2 Brand | Powertrain |
| Great Wall | P0173 | Fuel trim Brand | Powertrain |
| Hafei | P0173 | Fuel trim Brand | Powertrain |
| Holden | P0173 | Fuel Trim (Bank 2) SAE | Powertrain |
| Honda | P0173 | Fuel Trim (Bank 2) SAE | Powertrain |
| Hyundai | P0173 | Fuel Trim (Bank 2) SAE | Powertrain |
| Isuzu | P0173 | Fuel Trim (Bank 2) SAE | Powertrain |
| Land Rover | P0173 | Fuel trim malfunction Brand | Powertrain |
| Maserati | P0173 | Fuel Trim (Bank 2) SAE | Powertrain |
| Mitsubishi | P0173 | Fuel trim 2 Brand | Powertrain |
| Nissan | P0173 | Fuel injection system Brand | Powertrain |
| Peugeot | P0173 | Fuel Trim (Bank 2) SAE | Powertrain |
| Proton | P0173 | Fuel trim 2 Brand | Powertrain |
| Saab | P0173 | Fuel Trim Bank 2 Brand | Powertrain |
| MG (SAIC) | P0173 | Fuel Trim Bank 2 Brand | Powertrain |
| Smart | P0173 | Fuel Trim (Bank 2) SAE | Powertrain |
| Sprinter | P0173 | Fuel Trim (Bank 2) SAE | Powertrain |
| Suzuki | P0173 | Fuel Trim (Bank 2) Brand | Powertrain |
| Tata | P0173 | Fuel Trim Bank 2 Brand | Powertrain |
| Toyota | P0173 | Invalid engine oil temperature information Brand | Powertrain |
| Volkswagen | P0173 | bank 2: malfunction; No signal/communication 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 1
These 7-character codes are manufacturer-specific variants of P0173 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| SsangYong | P017300 | Insufficient MDP of injector #3 Brand | Powertrain |
6Related codes
Browse Pxxx codes or P017xx codes.