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Symptom: P1230-TIMING GOVERNING NEGATIVE GOVERNOR DEVIATION When Monitored and Set Condition: P1230-TIMING GOVERNING NEGATIVE GOVERNOR DEVIATION When Monitored: With the engine speed between 1000 and 4800 RPM. Set Condition: The ECM detects 3 degrees of excess timing retard for at least 10 seconds. POSSIBLE CAUSES CHECK FOR OTHER DTCS ENGINE CONTROL MODULE REPLACE THE FUEL INJECTION PUMP INTERMITTENT CONDITION FUEL INJECTION PUMP TIMING INCORRECT TEST ACTION APPLICABILITY 1 Turn the ignition on. All Yes → No → 2 NOTE: This DTC will set due to noise on the Needle Movement Sensor All Yes → Refer to the Symptom List for diagnosis of the other DTCs before No → 3 Check the Fuel Injection Pump timing using the Service Information. All Yes → No → Reset the Fuel Injection Pump timing in accordance with the 111 DRIVEABILITY - DIESEL |