B2859 Alfa Romeo Crosswagon OBD Code

OBD/2 B2859 error code description and symptoms.

HO2S Sensor Circuit Malfunction (HO2S-11) During testing the HO2S Heaters are checked for opens/shorts and excessive current draw.
The test fails when current draw exceeds a calibrated limit and/or an open or short is detected. Short to VPWR in harness or HO2S. Water in harness connector. Open VPWR circuit. Open GND circuit. Low battery voltage. Corrosion or poor mating terminals and wiring Damaged HO2S heater. Damaged PCM.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

B2859 Alfa Romeo Crosswagon Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine B2859 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If ignition coil h primary/secondary circuit malfunction so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the ignition coil h primary/secondary circuit malfunction.

Common Causes of Alfa Romeo Crosswagon B2859 OBD2 Code

A common cause of code B2859 is the failure of Ignition Coil H Primary/Secondary Circuit Malfunction, but there are several other possible causes as well, such as ;

Exhaust tube
Failures of clutch motion/travel sensors.
Camshaft advance mechanism binding (VCT unit)
Starting system circuit Dead (Weak) battery

B2859 is a kind of Body Trouble Code

Auto body problems aren't always easy to spot. Diagnosing auto body problems sometimes requires a little know-how. In this section you'll find articles dedicated to teaching you how to diagnose auto body problems.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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B2859 Alfa Romeo Crosswagon OBD Code

B2859 Alfa Romeo Crosswagon Error Code Repair Process :

Common Causes of Alfa Romeo Crosswagon B2859 OBD2 Code

B2859 code for other Alfa cars