Mazda CX-5 Service & Repair Manual: Heated Oxygen Sensor (HO2 S)

Mazda CX-5 Service & Repair Manual / Engine / Control / Heated Oxygen Sensor (HO2 S)

Purpose/Function

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.
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

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	Stops the fuel feedback control of the HO2S.
P0038:00	Stops the fuel feedback control of the HO2S.

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:

Intermediate Shaft Removal/Installation
WARNING: The steering column (EPS motor) temperature increases directly after continuous turning of the steering mechanism which could cause burns if it is touched. Before performing any servicing, verify that the steering column has cooled off. 1. Rotate the steering wheel un ...

Map Light Removal/Installation
Front Map Light 1. Disconnect the negative battery cable.. 2. Open the sunglasses holder. 3. Remove the screws from the front map light. 4. Move the front map light in the direction of the arrow (1) shown in the figure and pull out the pin from the bracket. CAUTION: Be careful ...

Parking Brake Lever Removal/Installation
1. Remove the front console box.. 2. Remove the shift lever knob. (MTX). 3. Remove the shift panel.. 4. Remove the upper panel.. 5. Remove in the order indicated in the table. 6. Install in the reverse order of removal. 7. After installation, inspect the parking brake lever stroke.. ...