P3977 Nissan Elgrand OBD Code

OBD/2 P3977 error code description and symptoms.

Output Shaft Speed sensor circuit intermittent failure The output shaft speed sensor signal to the PCM is irregular or interrupted.
Harness connector not properly seated Harness intermittently shorted, or open Harness connector damaged OSS sensor damaged, or not installed properly Verify harness and connector integrity Verify OSS sensor proper installation.

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.

P3977 Nissan Elgrand Error Code Repair Process :

If your scp (j1850) invalid or missing data for wheels 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 P3977 and engine control unit are in charge of monitoring a bunch of different scp (j1850) invalid or missing data for wheels, and if they get a reading that's a little out of whack, up pops the check engine light.

Difficulty Level (Soso)
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Repair Time (30 Min.)
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Cost Prediction : $ 80-120

Common Causes of Nissan Elgrand P3977 OBD2 Code

A common cause of code P3977 is the failure of SCP (J1850) Invalid or Missing Data for Wheels, but there are several other possible causes as well, such as ;
Wrench Tool P3977 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.

P3977 code for other Nissan cars

You can view according P3977 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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