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P0644 Engine Trouble Code

Meaning of P0644 engine trouble code is : P0644 code can be about replacing a broken oxygen sensor can eventually lead to a busted catalytic convertor which can cost upwards of $2,000. Taking your car into a shop will cost you around $200 depending on the car. However, an oxygen sensor is easy to replace on many cars and is usually detailed in the owner's manual. If you know where the sensor is, you only have to unclip the old sensor and replace it with a new one. Regardless of how you approach it, you should get this fixed right away.

P0644 Possible Solution:

P0644 Engine

The crankshaft sensor signals the fuel injection computer or the ignition control when the cylinders are firing. This causes the ignition coil to provide a spark and the injector to inject fuel into each cylinder at the right time.If either sensor isn't working correctly, the car will run rough and the engine will be less efficient. In later car models, the car's computer can usually keep the vehicle running, but the engine warning light on the dashboard goes on to warn the driver.

P0644 Code Meaning :

P 0 6 4 4
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Intake Valve Control Solenoid Circuit Low Fuel Temperature Sensor B Circuit Range/Performance Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector) Timing Reference High Resolution Signal A Too Many Pulses

Regarding the P0644 code, it would probably be worthwhile to carefully inspect the wire harness near the intake manifold bracket. This is done most easily from below the car in the area near the oil filter.

P0644 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P0644 engine trouble code is about Timing Reference High Resolution Signal A Too Many Pulses.

Reason For P0644 Code

The reason of P0644 OBD-II Engine Trouble Code is Fuel Temperature Sensor B Circuit Range/Performance.

P0644 the main thing to check is to verify the operation of the VCT solenoid. You're looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific repair manual to perform component tests for the VCT unit.