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:

Powertrain System Outline [Fw6 A EL, Fw6 Ax EL]
Outline The powertrain consists of a 2-piece multi-plate clutch, 3-piece multi-plate brake, a one-way clutch, and a 3-piece single-type planetary gear. Construction Component parts list Component parts Movement Multi-plate clutch ...

Condenser Removal/Installation
1. Disconnect the negative battery cable.. 2. Remove the following parts: a. Trunk board. b. Trunk end trim (LH). c. Rear scuff plate (LH). d. Trunk side trim (LH). e. D-pillar trim (LH). 3. Disconnect the connector. 4. Remove the bolts. 5. Remove the condenser. 6. Install in ...

Tire mobility kit
Preparation Applies to: vehicles with tire mobility kit Read and follow the important safety precautions. Set the parking brake. Select the "P" selector lever position. Check if a repair with the tire mobility kit is possible. Using tire mobility kit Applies to: vehicles with tire mobility kit ...