U1997 Trouble Code

View U1997 obd/2 error code description and symptoms. U1997 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.

As the engine heats up and combustion becomes easier and more complete, the PCM will command the idling control valve to increase the amount of air entering the engine to suit the changing conditions. However, when the load on the engine changes, say, when some electrical consumers or other systems are either turned on or off, the PCM adapts the signal voltage to the idle control valve to ensure that the idling speed remains stable, and at the RPM specified by the manufacturer.

U1997 Error Code Repair Process :

If your air bag crash sensor #1 ground circuit short to ground check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system U1997 and engine control unit are in charge of monitoring a bunch of different air bag crash sensor #1 ground circuit short to ground, and if they get a reading that's a little out of whack, up pops the check engine light.

U1997 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 U1997

A common cause of code U1997 is the failure of Air Bag Crash Sensor #1 Ground Circuit Short To Ground, but there are several other possible causes as well, such as ;

Exhaust tube
Exhaust tube
Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection
Faulty front heated oxygen sensor

U1997 code for all cars

You can view according U1997 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+U1997 Gray Model O

+U1997 Ford V-8

+U1997 Byd F

+U1997 Chevrolet Nomad

+U1997 Chevrolet Beretta

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

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