P0B78 Trouble Code

View P0B78 obd/2 error code description and symptoms. P0B78 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.

P0B78 Error Code Repair Process :

If your air bag driver circuit short to ground - loop #2 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 P0B78 and engine control unit are in charge of monitoring a bunch of different air bag driver circuit short to ground - loop #2, and if they get a reading that's a little out of whack, up pops the check engine light.

P0B78 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Common Causes of P0B78

A common cause of code P0B78 is the failure of Air Bag Driver Circuit Short to Ground - Loop #2, but there are several other possible causes as well, such as ;

Exhaust tube
Dirty Oil
Exhaust gas leaks
Fuel injectors may be faulty

P0B78 code for all cars

You can view according P0B78 DTC for your car model. We selected several models to see obd2 solutions click and view it.

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

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