U3331 Bmw 7 OBD Code

OBD/2 U3331 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.

In most cases, the TCM is integrated into a single housing with the PCM. Nevertheless, the section of the module which controls (automatic) transmission function may be powered up separately. In any case, the TCM is typically powered using switched (only present with the ignition switch in the ON, start, or run position) voltage. This circuit is normally equipped with a fuse, fusible link, and/or a relay. Frequently, the PCM and TCM are powered using the same relay albeit by separate circuits. Access to a reliable vehicle information source will yield necessary details of the TCM power circuit for the specific vehicle in question.

U3331 Bmw 7 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine U3331 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 fuel restriction condition 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 fuel restriction condition.

Common Causes of Bmw 7 U3331 OBD2 Code

A common cause of code U3331 is the failure of Fuel Restriction Condition, but there are several other possible causes as well, such as ;

Exhaust tube
Faulty Air fuel ratio (A/F) Sensor 1 Bank 1
Damaged ECM
Insufficient cylinders compression

U3331 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.

About Us | Contact | Privacy

U3331 Bmw 7 OBD Code

U3331 Bmw 7 Error Code Repair Process :

Common Causes of Bmw 7 U3331 OBD2 Code

U3331 code for other Bmw cars