P1645 Trouble Code

View P1645 obd/2 error code description and symptoms. P1645 engine photo

HO2S Sensor Circuit Malfunction (HO2S-11) During testing the HO2S Heaters are checked for opens/shorts and excessive current draw.
The test fails when current draw exceeds a calibrated limit and/or an open or short is detected. Short to VPWR in harness or HO2S. Water in harness connector. Open VPWR circuit. Open GND circuit. Low battery voltage. Corrosion or poor mating terminals and wiring Damaged HO2S heater. Damaged PCM.

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.

P1645 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine P1645 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 p1645 fuel pump resistor switch 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 p1645 fuel pump resistor switch circuit malfunction.

P1645 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 P1645

A common cause of code P1645 is the failure of P1645 Fuel Pump Resistor Switch Circuit Malfunction, but there are several other possible causes as well, such as ;

Exhaust tube
Exhaust tube
Clogged or faulty fuel injector (s)
EVAP system hose leaking

P1645 code for all cars

You can view according P1645 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P1645 Amc Rambler

+P1645 Alfa Romeo 147

+P1645 Mercury Marauder

+P1645 Leader 60

+P1645 Light Car Company Rocket

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

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