Trouble code P1147 means: HO2S-12 (Bank 1 Sensor 2) Rich Shift Monitoring (Bank 1)
What is the code 1564 on a 2002 nissan maxima
P1147 is the code thrown when a problem occurs with either an O2 Sensor or its electrical harness.
Trouble code P0023 means: "B" camshaft position - actuator circuit (Bank 2)
Trouble code P0021 means: Intake Camshaft Position Timing - Over-Advanced (Bank 2)
Camshaft position actuator A bank 2 usually means change the camshaft position sensor
Trouble code P0780 means:Shift malfunction
Trouble code P1320 means: Distributor Signal Interrupt
Trouble code P0745 means:Pressure control solenoid malfunction
Trouble code P0305 means:Cylinder No.5 misfire detected
Trouble code P0745 means:Pressure control solenoid malfunction
Trouble code P1337 means: CKP Sensor (Ref)
02 Maxima P1147 is the code thrown when a problem occurs with either an O2 Sensor or its electrical harness. By far the most common is a sensor failure. It's generally a good idea to replace all of the O2 sensors at around 60K miles or when the first one fails. There are two sensors on the exhaust manifold near the engine block and two after the first catalytic convertor. The first two are accessible from under the hood while the second two you get to from beneath the car. The O2 sensor helps the vehicle to control the fuel to air mixture (lean or rich) and a malfunctioning sensor can cause poor power, emissions, and fuel economy.