U1601 Trouble Code

View U1601 obd/2 error code description and symptoms. U1601 engine photo

Catalytic converters must be warm before they can work properly. On a cold start the PCM provides a rich mixture to keep the cold engine running.
All that extra fuel goes into the catalytic converter. But the exhaust isn't very hot, because, ah, the engine is pretty cold. GM has employed several strategies to fire up the catalytic converter quicker and reduce cold start emissions. One way is to use a secondary air pump that pumps outside air directly into the catalytic converter.

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.

U1601 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine U1601 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 memory 2 switch circuit short to ground 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 memory 2 switch circuit short to ground.

U1601 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

Common Causes of U1601

A common cause of code U1601 is the failure of Memory 2 Switch Circuit Short To Ground, but there are several other possible causes as well, such as ;

Dirty Oil
Exhaust tube
Intake Valve Timing Control Solenoid Valve harness is open or shorted
Continuous oil flow to the VCT piston chamber

U1601 code for all cars

You can view according U1601 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+U1601 Fiat 600

+U1601 Zaz Jalta

+U1601 Honda Quint

+U1601 Renault Espace 4

+U1601 Bentley Azure

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

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