P1138 MAZDA Rear O2 Sensor Self Test Fault

Possible causes – Faulty Rear O2 Sensor– Rear O2 Sensor harness is open or shorted– Rear O2 Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P0813 MAZDA Reverse Output Circuit

Possible causes – Faulty Reverse Input Switch– Reverse Input Switch harness is open or shorted– Reverse Input Switch circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P0661 MAZDA Secondary Shutter Valve (SSV) Low Input

Possible causes – Faulty Secondary Shutter Valve (SSV) Solenoid Valve– Secondary Shutter Valve Solenoid Valve harness is open or shorted– Secondary Shutter Valve (SSV) solenoid valve circuit poor electrical connection When is the obd code mean? The Engine Control Module (ECM) has detected a low signal from the Secondary Shutter Valve (SSV) Symptoms – Engine…

P0662 MAZDA Secondary Shutter Valve (SSV) High Input

Possible causes – Faulty Secondary Shutter Valve (SSV) Solenoid Valve– Secondary Shutter Valve Solenoid Valve harness is open or shorted– Secondary Shutter Valve (SSV) solenoid valve circuit poor electrical connection When is the obd code mean? The Engine Control Module (ECM) has detected a low signal from the Secondary Shutter Valve (SSV) Symptoms – Engine…

P0660 MAZDA Secondary Shutter Valve (SSV) Open

Possible causes – Faulty Secondary Shutter Valve (SSV) Solenoid Valve– Secondary Shutter Valve Solenoid Valve harness is open or shorted– Secondary Shutter Valve (SSV) solenoid valve circuit poor electrical connection When is the obd code mean? The Engine Control Module (ECM) has detected an improper signal from the Secondary Shutter Valve (SSV) Symptoms – Engine…

P0140 MAZDA HO2S Rear Circuit No Activity Detected

Possible causes – Faulty Rear Heated Oxygen Sensor Bank 1– Rear Heated Oxygen Sensor Bank 1 harness is open or shorted– Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech description Replacing the Rear Heated Oxygen Sensor Bank…

P0138 MAZDA HO2S RR Circuit High Input

Possible causes – Faulty Rear Heated Oxygen Sensor Bank 1– Rear Heated Oxygen Sensor Bank 1 harness is open or shorted– Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection– Intake air leaks– Exhaust gas leaks– Inappropriate fuel pressure– Faulty fuel injectors Tech description Replacing the Rear Heated Oxygen Sensor Bank 1 usually takes…

P0161 MAZDA HO2S22 Heater Circuit Fault

Possible causes – Faulty Rear Heated Oxygen Sensor Bank 2– Rear Heated Oxygen Sensor Bank 2 harness is open or shorted– Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure – Faulty fuel injectors– Intake air leaks– Exhaust gas leaks Tech description Replacing the Rear Heated Oxygen Sensor Bank 2 usually…

P0158 MAZDA HO2S LR Circuit High Input

Possible causes – Faulty Rear Heated Oxygen Sensor Bank 2– Rear Heated Oxygen Sensor Bank 2 harness is open or shorted– Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure – Faulty fuel injectors– Intake air leaks– Exhaust gas leaks Tech description Replacing the Rear Heated Oxygen Sensor Bank 2 usually…

P0551 MAZDA Power Steering Pressure Sensor Circuit Range/Performance

Possible causes – Faulty Power Steering Pressure Sensor– Power Steering Pressure Sensor harness is open or shorted– Power Steering Pressure Sensor circuit poor electrical connection When is the obd code mean? An out of range voltage from the Power Steering Pressure Sensor is sent to Engine Control Module (ECM). Symptoms – Engine Light ON (or…