C3909 Trouble Code

View C3909 obd/2 error code description and symptoms. C3909 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.

To check for an open circuit, trace along the length of the transmission control circuit, checking for breaks in the wiring. Repair any broken wiring and make sure all connectors are fully seated and locked.Pay close attention to connectors, looking for corrosion, bent or broken pins, or moisture in the connector. Repair any connector issues even if they are not specifically part of the transmission control circuit as they may serve a function in providing power to the transmission control circuit.

C3909 Error Code Repair Process :

The scent may C3909 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 C3909, so if the inside of your car rear sounder circuit failure 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.

C3909 is a kind of Chassis Trouble Code

Diagnosing chassis noises can be one of the most frustrating problems technicians face. Fortunately, manufacturers have engineered noise, vibration and harshness (NVH) diagnostic techniques and equipment to find the source of the noise.

Common Causes of C3909

A common cause of code C3909 is the failure of Rear Sounder Circuit Failure, but there are several other possible causes as well, such as ;

Exhaust tube
Dirty Oil
Ignition misfiring
Fuel filler cap remains open or fails to close

C3909 code for all cars

You can view according C3909 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C3909 Porsche Tapiro

+C3909 Hotchkiss Af

+C3909 Bentley 3-litre

+C3909 Oldsmobile Ss

+C3909 Vauxhall Carlton

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