Mazda CX-5 Service & Repair Manual: Heated Oxygen Sensor (HO2 S)
Purpose/Function
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Detects the oxygen concentration (theoretical air/fuel ratio) in the exhaust gas as basic information for mainly determining the fuel injection amount and as information for determining the deterioration of catalytic converter.
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Detects the oxygen concentration (theoretical air/fuel ratio) in the exhaust gas and inputs it to the PCM as an oxygen concentration (theoretical air/fuel ratio) signal.
Construction
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Installed to the exhaust manifold.
-
A zirconia element has been adopted as the detecting element for detecting the oxygen concentration (theoretical air/fuel ratio).
Operation
-
Inputs the signal, which fluctuates according to the oxygen concentration (theoretical air/fuel ratio), to the PCM.
HO2S characteristic
Fail-safe
|
DTC No. |
Fail-safe function |
|
P0037:00 |
|
|
P0038:00 |
|
Heated Oxygen Sensor (HO2 S) Removal/Installation
WARNING:
A hot engine and exhaust system can cause severe burns. Turn off the engine
and wait until they are cool before removing the exhaust system.
CAUTION:
Do not allow fla ...
Intake Air Temperature (Iat) Sensor Inspection
IAT Sensor No.1
Resistance inspection
NOTE:
Because the IAT sensor No.1 is integrated in the MAF sensor, replacing the
IAT sensor No.1 includes replacement of the MAF sensor/IAT sensor No ...
Other materials:
Car Navigation System Does Not Operation [Car Navigation System]
Possible DTC
Even if the map screen is touched, the car-navigation system cannot be
operated
POSSIBLE CAUSE
Audio unit malfunction (bad LCD panel)
Car-navigation unit malfunction
Diagnosti ...
Rear Window Defroster/Outer Mirror Heater
Outline
Fogging is cleared from the rear window and outer mirror glass by heating
of the filament.
Structural view
System wiring diagram
Vehicles with full-auto air conditioner system
Vehicles with manual air conditioner system
Construction
Rear window defroster
...
Starting a Flooded Engine
If the engine fails to start, it may be flooded (excessive fuel in the engine).
Follow this procedure:
1. If the engine does not start within five seconds on the first try, wait ten
seconds and try again.
2. Make sure the parking brake is on.
3. Depress the accelerator all the way and hold it ...