PowertrainP2179

Caution

Severity: Caution - get it checked when you can

Mixture too lean

32 brands affected · Description from BMW data.

Key terms: Control module: a small computer that runs one part of the car · 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?

Caution · drive with care

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 32

Brand	Code	Description	System
Ashok Leyland CV	P2179	No description available	Powertrain
BAIC Motor	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
Mercedes-Benz	P2179	No description available	Powertrain
BMW	P2179	Mixture too lean Brand	Powertrain
BYD	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
Chery	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
Chrysler	P2179	System too lean off idle Brand	Powertrain
Daewoo	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
DFFS	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
DFFX	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
DFXK	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
EOBD	P2179	System too lean off idle bank 2 Brand	Powertrain
Geely	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
GM	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
Great Wall	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
Hafei	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
Holden	P2179	Fuel Trim System Lean at Cruise or Acceleration Bank 2 Brand	Powertrain
Hyundai	P2179	No description available	Powertrain
Isuzu	P2179	No description available	Powertrain
Land Rover	P2179	System too lean off idle Bank 2 Brand	Powertrain
Maserati	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
Mitsubishi	P2179	Fuel trim 2 too lean Brand	Powertrain
Opel	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
Peugeot	P2179	No description available	Powertrain
Porsche	P2179	No description available	Powertrain
Proton	P2179	Fuel trim 2 too lean Brand	Powertrain
Saab	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
MG (SAIC)	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
Suzuki	P2179	System too Lean off Idle Bank 2 Brand	Powertrain
Tata	P2179	System Too Lean Off Idle Bank 2 Brand	Powertrain
Toyota	P2179	System too lean off idle bank 2 Brand	Powertrain
Volkswagen	P2179	system too Lean off idle; Open or short to ground 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 P2179 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P217900	The mixture (cylinder bank 2) is too lean in partial load operation. Brand	Powertrain
Mercedes-Benz	P217902	The mixture (cylinder bank 2) is too lean in partial load operation. There is a general signal fault. Brand	Powertrain

6Related codes

Browse Pxxx codes or P217xx codes.