Yamaha MX775 - Page 127

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ELECTRICAL
FUEL INJECTION SYSTEM
Error Code No. P0131, P0132
Error Code P0131
System or Component Oxygen Sensor
Detail of Error Circuit Low Voltage
Engine Symptoms Deteriorated exhaust
Engine Running availability Able to run engine
DIAG Tool Code
Mode “DIAG”, Code “O
2
”
Diagnosing —
Probable Cause
• Malfunction in wire harness and coupler between sensor and ECU
• Low voltage in wire harness between sensor and ECU
• Malfunction in sensor unit
• Malfunction in ECU
Error Code P0132
System or Component Oxygen Sensor
Detail of Error Circuit High Voltage
Engine Symptoms Deteriorated exhaust
Engine Running availability Able to run engine
DIAG Tool Code
Mode “DIAG”, Code “O
2
”
Diagnosing —
Probable Cause
• Malfunction in wire harness and coupler between sensor and ECU
• High voltage in wire harness between sensor and ECU
• Malfunction in sensor unit
• Malfunction in ECU