Engine-Codes - Oldsmobile - C0305 OLDSMOBILE

C0305 OLDSMOBILE Code - Front Propshaft Speed Sensor

- Code Popularity: 1,812 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the C0305 OLDSMOBILE Code?

  • Faulty Front Propshaft Speed Sensor
  • Front Propshaft Speed Sensor harness is open or shorted
  • Front Propshaft Speed Sensor circuit poor electrical connection

|How to Fix the C0305 OLDSMOBILE Code?

Start by checking 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.

|C0305 OLDSMOBILE code tech notes

There is factory service bulletin for the C0305 code. The factory recommends reprogramming the Transfer Case Control Module (TCCOM) to fix the problem.

|What is the cost to diagnose the C0305 OLDSMOBILE code?

Labor: 1.0

The cost to diagnose the C0305 OLDSMOBILE code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are C0305 OLDSMOBILE code possible symptoms?

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the C0305 OLDSMOBILE Code Mean?

The Front 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 transfer case shift control module converts the pulsating AC voltage to a propshaft RPM which is used for the following functions:
- Calculations
- To monitor the difference between the front and rear propshaft speed
- In the AUTO, or the Adapt mode of operation, to determine the amount of slip and the percent of torque to apply to the front axle
The module accesses this input when the vehicle is in AUTO mode, 4HI, and 4LO ranges. The propshaft RPM can be displayed with a scan tool.

This DTC detects an open, short to ground, short to voltage or faulty sensor.

Front Propshaft Speed Sensor

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