Mazda CX-5 Service & Repair Manual: Air Fuel Ratio (A/F) Sensor

Mazda CX-5 Service & Repair Manual / Engine / Control / Air Fuel Ratio (A/F) Sensor

Purpose/Function

Detects the oxygen concentration (all-range air/fuel ratio) in the exhaust gas as basic information for mainly determining the fuel injection amount.
Detects the oxygen concentration (all-range air/fuel ratio) in the exhaust gas and inputs it to the PCM as an oxygen concentration (all-range air/fuel ratio) signal.

Construction

Installed to the exhaust manifold.
A zirconium element has been adopted as the detecting element for detecting the oxygen concentration (all-range air/fuel ratio).

Operation

Inputs the signal, which fluctuates according to the oxygen concentration (all-range air/fuel ratio), to the PCM.

A/F sensor characteristic

Fail-safe


DTC No.	Fail-safe function
P0031:00	Stops the fuel feedback control.
P0032:00	Stops the fuel feedback control.
P0130:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P0131:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P0132:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P0134:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P064D:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P2237:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P2243:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
P2251:00	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.

Air Fuel Ratio (A/F) Sensor 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 ...

Camshaft Position (CMP) Sensor Inspection

Intake CMP Sensor Visual inspection CAUTION: When replacing the CMP sensor, make sure there is no foreign material on it such as metal shavings. If it is installed with foreign material, ...

Other materials:

License Plate Light Bulb Removal/Installation
1. Disconnect the negative battery cable.. 2. Insert a tape-wrapped flathead screwdriver into the clearance between the lens and license plate light shown in the figure. 3. Move the flathead screwdriver in the direction of the arrow shown in the figure, pull out the lens from the license ...

Battery Removal/Installation [Skyactiv G 2.0]
1. Remove in the order indicated in the table. 2. Install in the reverse order of removal. 1 Negative battery cable (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0].) 2 Positive battery cable 3 ...

Lighting Systems
Outline Front combination lights have been adopted with parts related to the front exterior lights grouped and housed together. The following systems have been adopted to the headlights. Discharge headlight system (with discharge headlight system) Auto light ...