U20E5 Mazda B4000 OBD Code

OBD/2 U20E5 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.

U20E5 Mazda B4000 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine U20E5 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 column reach feedback potentiometer circuit short to ground 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 column reach feedback potentiometer circuit short to ground.

Common Causes of Mazda B4000 U20E5 OBD2 Code

A common cause of code U20E5 is the failure of Column Reach Feedback Potentiometer Circuit Short to Ground, but there are several other possible causes as well, such as ;

Exhaust tube
Camshaft advance mechanism binding (VCT unit)
Foreign matter caught in fuel filler cap
Faulty Mass Air Flow (MAF) sensor

U20E5 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

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

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U20E5 Mazda B4000 OBD Code

U20E5 Mazda B4000 Error Code Repair Process :

Common Causes of Mazda B4000 U20E5 OBD2 Code

U20E5 code for other Mazda cars