P1638 Trouble Code

View P1638 obd/2 error code description and symptoms. P1638 engine photo

Engine Coolant Temperature (ECT) Circuit High Input Indicates the sensor signal is greater than Self-Test maximum. The ECT sensor maximum is 4.6 volts or -50 C (-58 F). Note on some vehicles that are not equipped with an ECT sensor, CHT can be used and can set this DTC. Open circuit in harness Sensor signal short to power Damaged PCM Improper harness connection Damaged sensor ECT V PID reading greater than 4.6 volts with key ON and engine OFF or during any engine operating mode indicates a hard fault.

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

P1638 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine P1638 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 p1638 can link ecm/instm circuit / net 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 p1638 can link ecm/instm circuit / net.

Wrench Tool P1638 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 P1638

A common cause of code P1638 is the failure of P1638 Can Link ECM/INSTM Circuit / Net, but there are several other possible causes as well, such as ;

P1638 code for all cars

You can view according P1638 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P1638 Delage 3-litre +P1638 Ohta Pk +P1638 Renault Alpine +P1638 Bentley Brooklands +P1638 Ferrari 625

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

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