The code means that there is a problem with the heater element circuit of the heated oxygen sensor. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow, which is a very common problem for this type codes. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors.
What is the Cost to Diagnose the Code P0038 2004 Nissan Altima Sedan?
The cost of diagnosing the P0038 2004 Nissan Altima Sedan code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the Code P0038 2004 Nissan Altima Sedan Detected?
The P0037 is set when the ECM detects an excessively low voltage through the heated oxygen sensor heater circuit
What are Code P0038 2004 Nissan Altima Sedan Possible Symptoms?
Engine Light ON (or Service Engine Soon Warning Light)
Code P0038 2004 Nissan Altima Sedan Description
Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
P0038 2004 Nissan Altima Sedan Code - HO2S12 Heater Control Circuit Low
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