C0300 OLDSMOBILE Possible Causes
- Faulty Rear Propshaft Speed Sensor
- Rear Propshaft Speed Sensor harness is open or shorted
- Rear Propshaft Speed Sensor circuit poor electrical connection
How do I fix code C0300 OLDSMOBILE
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
C0300 OLDSMOBILE Tech NotesThere is factory service bulletin for the C0300 code. The factory recommends reprogramming the Transfer Case Control Module (TCCOM) to fix the problem.
Cost of diagnosing the C0300 OLDSMOBILE code
Labor: 1.0The cost of diagnosing the C0300 OLDSMOBILE code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
C0300 OLDSMOBILE Possible Symptoms
- Anti-Lock Brake System (ABS) Warning Light ON
- Engine Light ON (or Service Engine Soon Warning Light)
C0300 OLDSMOBILE MeaningThe rear propshaft speed sensor is a Permanent Magnet (PM) generator. The PM generator produces a pulsing AC voltage. The AC voltage level and number of pulses increases as speed increases. The module converts the pulsating AC voltage to a propshaft RPM which is used for calculations. The propshaft RPM can be displayed with a scan tool.
This DTC detects an open, short to ground, short to voltage or faulty sensor.
C0300 OLDSMOBILE More InformationNeed more information on how to fix the C0300 OLDSMOBILE code?
Get Access to Factory Service Manuals