U2974 Trouble Code

View U2974 obd/2 error code description and symptoms. U2974 engine photo

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.

U2974 Error Code Repair Process :

The scent may U2974 signal oil or coolant leaking from their normally closed-loop systems, or it may indicate dangerous exhaust gases invading your car's interior. Car and truck exhaust contains toxic gases such U2974, so if the inside of your car injection pump fuel metering control a range/performance (cam/rotor/injector) as if you were standing behind your car, get out and get it fixed. Fight the urge to take a little nap first. So sleepy. That's the carbon monoxide talking, friends. At least open a window on your way to the shop.

U2974 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.

Common Causes of U2974

A common cause of code U2974 is the failure of Injection Pump Fuel Metering Control A Range/Performance (Cam/Rotor/Injector), but there are several other possible causes as well, such as ;

Exhaust tube
EVAP system hose leaking
Fuel injector leaks
Faulty variable valve timing (VVT)

U2974 code for all cars

You can view according U2974 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+U2974 Panhard Et Levassor Gordon-bennet

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

About Us | Contact | Privacy