P1974 Trouble Code

View P1974 obd/2 error code description and symptoms. P1974 engine photo

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.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

Difficulty Level (Expert)
Level
Repair Time (35 Min.)
Time
Cost Prediction : $ 30-110

P1974 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine P1974 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If exhaust gas recirculation flow malfunction so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the exhaust gas recirculation flow malfunction.

Wrench Tool P1974 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 P1974

A common cause of code P1974 is the failure of Exhaust Gas Recirculation Flow Malfunction, but there are several other possible causes as well, such as ;

P1974 code for all cars

You can view according P1974 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P1974 Isuzu I-280 +P1974 Ledl As +P1974 Peugeot 204 +P1974 Pontiac Grand Safari +P1974 Toyota Land Cruiser

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

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