P1998 Renault 21 OBD Code

OBD/2 P1998 error code description and symptoms.

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.

As long as the throttle plate remains closed, the idling speed and quality is controlled by the PCM via the idle control valve, and as can be seen from the above it should be clear that idle control on a gasoline engine is a complex affair. For instance, if the engine is started in sub-zero temperatures, the PCM will command the idling control valve to allow less air to enter the engine to enrich the air/fuel mixture to create a condition which is roughly analogous to how chokes worked on carburetted engines to control idling in cold weather.

P1998 Renault 21 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine P1998 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 secondary air injection system relay b circuit 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 secondary air injection system relay b circuit malfunction.

Common Causes of Renault 21 P1998 OBD2 Code

A common cause of code P1998 is the failure of Secondary Air Injection System Relay B Circuit Malfunction, but there are several other possible causes as well, such as ;

Engine Control Module (ECM)
Exhaust gas leaks
Failures of clutch motion/travel sensors.
Engine Control Module (ECM)

P1998 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.

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

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P1998 Renault 21 OBD Code

P1998 Renault 21 Error Code Repair Process :

Common Causes of Renault 21 P1998 OBD2 Code

P1998 code for other Renault cars