Oxygen sensor for VAZ 2112

The oxygen sensor (hereinafter DC) is designed to measure the amount of oxygen in the exhaust gases of a car for subsequent correction of the enrichment of the fuel mixture.

For an automobile engine, a rich and lean mixture is equally "poor". The engine “loses” power, fuel consumption increases, the unit is unstable at idle.

On cars of domestic brands, including VAZ and Lada, an oxygen sensor is pre-installed. European and American hardware is equipped with two controllers:

• Diagnostics;
• Manager.

In design and size, they do not differ from each other, but perform different functions.

Where is the oxygen sensor located on the VAZ 2112

On cars of the Zhiguli family (VAZ), the oxygen regulator is located in the section of the exhaust pipe between the exhaust manifold and the resonator. Access to the mechanism for the purpose of prevention, replacement from under the bottom of the car.

For convenience, use the viewing channel, roadside overpass, hydraulic lifting mechanism.

The average service life of the controller is from 85 to 115 thousand km. If you refuel with high-quality fuel, the service life of equipment increases by 10-15%.

Oxygen sensor for VAZ 2112: original, analogs, price, articles

Catalog number/brand	Price in rubles
BOSCH 0258005133 (original) 8 and 16 valves	От 2400
0258005247 (analog)	From 1900-2100
21120385001030 (analog)	From 1900-2100
*prices are for May 2019

Cars VAZ 2112 serial production are equipped with oxygen regulators of the German brand Bosch. Despite the low cost of the original, not many motorists buy factory parts, preferring analogues.

Note to the driver!!! Motorists at service stations strongly recommend purchasing parts with factory catalog numbers in order to avoid unstable operation of the power unit.

Signs of malfunction, unstable operation of the oxygen sensor on a VAZ 2112 car

• Difficult start of a cold, hot engine;
• System error indication on the board (P0137, P0578, P1457, P4630, P7215);
• Increased fuel consumption;
• Engine detonation;
• A copious amount of blue, gray, black smoke (exhaust) comes out of the exhaust pipe. Fuel mixture imbalance indication;
• In the process of starting, the engine "sneezes", "drowns".

Reasons for reducing the resource of equipment operation

• Natural factor due to the duration of the operation without intermediate prophylaxis;
• Mechanical damage;
• Marriage in production;
• Weakened contact at the ends of the stroke;
• Unstable operation of the firmware of the electronic control unit, as a result of which the input data is interpreted incorrectly.

Installation and replacement of an oxygen sensor on a VAZ 2112

Preparatory stage:

• The key is at "17";
• New driver;
• Rags;
• Multimeter;
• Additional lighting (optional).

Do-it-yourself driver diagnostics on the VAZ 2112:

• We turn off the engine, open the hood;
• Disconnect the DC terminal;
• We bring the limit switches of the multimeter (pinout);
• We turn on the equipment in the "Endurance" mode;
• Reading the weights.

If the arrow goes to infinity, the controller is working. If the readings go to "zero" - a short circuit, a malfunction, the lambda probe dies. Since the controller is non-separable, it cannot be repaired, it must be replaced with a new one.

The process of self-replacement is not at all complicated, but requires care on the part of the repairman.

• We install the machine in the viewing channel for the convenience of work. If there is no viewing hole, use a roadside overpass, hydraulic lift;
• We turn off the engine, open the hood, wait until the exhaust system cools down to a safe temperature so as not to burn the skin on the hands;
• Near the resonator (coupling) we find an oxygen regulator. We remove the block with wires;
• With the key on “17”, we unscrew the sensor from the seat;
• We carry out preventive maintenance, clean the thread from deposits, rust, corrosion;
• We screw in the new controller;
• We put the block with wires.

We start the engine, idle. It remains to check the serviceability, performance, stability of the engine cycle. We look at the dashboard, error indication of the electronic control unit.

Recommendations for the care and maintenance of the car VAZ 2112

• At the stage of the factory warranty, observe the terms of technical inspection;
• Buy parts with original part numbers. A complete list of indices is indicated in the operating instructions for the VAZ 2112;
• If a malfunction or unstable operation of the mechanisms is detected, contact the service station for a complete diagnosis;
• After the expiration of the factory warranty, carry out a technical inspection of the car with a frequency of 15 km.