Possible causes – Faulty fuel level sensor– Fuel level sensor harness is open or shorted– Fuel level sensor circuit poor electrical connection Tech notes Low fuel level can trigger this code. Before replacing any parts try filling up the fuel

Possible causes – Faulty fuel level sensor– Fuel level sensor harness is open or shorted– Fuel level sensor circuit poor electrical connection When is the code detected? An excessively high voltage is sent from the sensor is sent to Engine

Possible causes – Faulty fuel level sensor– Fuel level sensor harness is open or shorted– Fuel level sensor circuit poor electrical connection When is the code detected? An intermittent low voltage is sent from the sensor is sent to Engine

Possible causes – Faulty fuel level sensor– Fuel level sensor harness is open or shorted– Fuel level sensor circuit poor electrical connection When is the code detected? The output signal of the fuel level sensor does not change within the

Possible causes – Faulty fuel pressure regulator– Fuel pressure regulator harness is open or shorted– Fuel pressure regulator electrical circuit poor connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Faulty fuel pressure regulator– Fuel pressure regulator harness is open or shorted– Fuel pressure regulator electrical circuit poor connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Faulty fuel pressure regulator– Fuel pressure regulator harness is open or shorted– Fuel pressure regulator electrical circuit poor connection– Faulty fuel pressure sensor Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0089 MAZDA Description

Possible causes – Faulty Fuel Tank Pressure Sensor– Fuel Tank Pressure Sensor harness is open or shorted– Fuel Tank Pressure Sensor circuit poor electrical connection When is the code detected? A low voltage signal from the fuel tank pressure sensor

Possible causes – Faulty Fuel Tank Pressure Sensor– Fuel Tank Pressure Sensor harness is open or shorted– Fuel Tank Pressure Sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? A high voltage signal from

Possible causes – Faulty Fuel Temperature Sensor– Fuel Temperature Sensor harness is open or shorted– Fuel Temperature Sensor circuit poor electrical connection Tech notes Replaced Fuel Temperature Sensor Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0185

Possible causes – Faulty Fuel Temperature Sensor– Fuel Temperature Sensor harness is open or shorted– Fuel Temperature Sensor circuit poor electrical connection Tech notes Replaced Fuel Temperature Sensor Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0189

Possible causes – Faulty Fuel Temperature Sensor– Fuel Temperature Sensor harness is open or shorted– Fuel Temperature Sensor circuit poor electrical connection When is the code detected? An excessively high voltage from the sensor is sent to ECM. Symptoms –

Possible causes – Faulty Fuel Temperature Sensor– Fuel Temperature Sensor harness is open or shorted– Fuel Temperature Sensor circuit poor electrical connection When is the code detected? An excessively low voltage from the sensor is sent to ECM. Symptoms –

Possible causes – Faulty Fuel Temperature Sensor– Fuel Temperature Sensor harness is open or shorted– Fuel Temperature Sensor circuit poor electrical connection When is the code detected? Rationally incorrect voltage from the sensor is sent to ECM, compared with the

Possible causes – Faulty Fuel Temperature Sensor– Fuel Temperature Sensor harness is open or shorted– Fuel Temperature Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0184 MAZDA Description The fuel tank temperature

Possible causes – Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground– Heated Oxygen Sensor (H2OS)

Possible causes – Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground– Heated Oxygen Sensor (H2OS) Bank

Possible causes – Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 harness is open shorted to ground– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit poor electrical connection– Heated Oxygen

Possible causes – Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 harness is open shorted to ground– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit poor electrical connection– Heated Oxygen

Possible causes – Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit open shorted to ground– Heated Oxygen Sensor (H2OS) Bank