P3977 Datsun Deluxe OBD Code

OBD/2 P3977 error code description and symptoms.

The Throttle Position sensor signals the Engine Control Module as to the current position of the engine throttle valve.
The current throttle valve opening is based on the driver's input from the gas pedal. The ECM uses the information from this sensor to help calculate fuel delivery and spark timing.

Gear changes are accomplished by a command from the TCM to energize the clutch actuator to release the clutch; after which various actuators inside the transmission disengage the current gear, and depending on current operating conditions, engage the next higher or lower gear ratio. All of this happens much faster than a human driver could change gears, and in most applications, gear changes are as smooth and seamless as on any fully automatic transmission.

P3977 Datsun Deluxe Error Code Repair Process :

If your vehicle failed a P3977 test and the P3977 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses scp (j1850) invalid or missing data for wheels a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look scp (j1850) invalid or missing data for wheels: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression. Use your OBD Express DIY to look at the oxygen sensor outputs, coolant temperature, airflow, calculated engine load, and inlet air temperature.

Difficulty Level (Expert)

Repair Time (35 Min.)

Cost Prediction : $ 20-50

Common Causes of Datsun Deluxe 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 ;

• Damaged ECM
• Engine Control Module (ECM)
• EVAP canister or fuel tank leaks
• Faulty Intake Valve Timing Control Solenoid Valve

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 Datsun cars

You can view according P3977 DTC for your car model. We selected several models to see obd2 solutions click and view it.

• P3977 Datsun 100
• P3977 Datsun 1000
• P3977 Datsun 120
• P3977 Datsun 1200
• P3977 Datsun 14
• P3977 Datsun 15
• P3977 Datsun 1600
• P3977 Datsun 1800
• P3977 Datsun 2000
• P3977 Datsun 2300
• P3977 Datsun 240
• P3977 Datsun 260
• P3977 Datsun 280
• P3977 Datsun Bluebird
• P3977 Datsun Laurel
• P3977 Datsun On-do
• P3977 Datsun Pulsar
• P3977 Datsun Skyline
• P3977 Datsun Sports
• P3977 Datsun Violet
• P3977 Datsun Z

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