OBD code C0109 indicates a fault in the AntiLock Brake System (ABS) Module.
Symptoms include the ABS Warning Light and Engine Light being illuminated.
This is often caused by a faulty ABS Module, open/shorted harness, or poor electrical connection.
While it may not affect drivability, it’s crucial for safety.
To fix, inspect and repair any damaged wiring or connectors related to the ABS Module.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the c0109 OBD Code
The vehicle displays a warning light indicating an issue with the brake pressure sensor circuit (C0109).
- Symptoms: AntiLock Brake System (ABS) Warning Light ON.
- Engine Light ON (or Service Engine Soon Warning Light).
- Possible loss of ABS functionality.
- Brake pedal may feel different during braking.
- Unusual noises coming from the ABS system.
Causes of the c0109 OBD Code
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Possible reasons for fault code C0109 include issues with the brake booster sensor or wiring.
- C0109 can be caused by a faulty AntiLock Brake System (ABS) Module.
- An open or shorted AntiLock Brake System (ABS) Module harness.
- A poor electrical connection in the AntiLock Brake System (ABS) Module circuit.
Fixing Error Code c0109 Step By Step
Repair involves inspecting and repairing the ABS pump motor circuit for fault code C0109.
- To fix OBDII code C0109, start by reviewing the possible causes mentioned above.
- Visually examine the wiring harness and connectors related to the ABS pump motor circuit.
- Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Test the ABS pump motor for proper operation and power supply.
- Replace the ABS pump motor if it is faulty.
- Clear the fault codes and perform a road test to ensure the issue is resolved.
Cost Of Fixing c0109 Fault Code
Diagnosing and repairing fault code C0109 may involve inspecting and replacing the ABS pump motor circuit.
The cost to diagnose and fix OBD code C0109 depends on the estimated 1. 0hour repair time.
Labor rates usually range from $75 to $150 per hour.
The total cost will vary based on shop rates, complexity of the issue, and any additional parts or services needed.
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Details of the c0109 OBD Code
Code C0109 indicates a fault with the ABS pump motor circuit.
OBD code C0109 means ABS Pump Motor Circuit Failure.
This code is triggered by the Antilock Braking System (ABS) control module when it detects a malfunction in the circuit related to the ABS pump motor.
The ABS pump motor is responsible for building hydraulic pressure in the ABS system to assist with braking.
When this circuit fails, it can affect the proper operation of the ABS system, potentially leading to issues with braking performance and safety.
Mechanic’s Tech Notes
Code C0109 indicates an issue with the brake booster sensor circuit.
OBDII code C0109 indicates a problem with the transmission control module (TCM) power supply circuit.
To diagnose this issue, use a multimeter to check the TCM’s power and ground connections for proper voltage and continuity.
Additionally, use a scan tool to communicate with the TCM over the Controller Area Network (CAN) to ensure it responds.
Visually inspect the wiring harness and connectors for any damage, and check for broken, bent, or corroded pins.
If everything looks good, consider reprogramming or reflashing the TCM as a potential fix.
FAQ
OBD code C0109 indicates a fault in the AntiLock Brake System (ABS) Module. Symptoms include ABS and Engine warning lights. Check module, harness, and connections for issues.
Common symptoms of OBD code C0109 include ABS warning light on, engine light on. Causes may be faulty ABS module, harness issues. Fix: Inspect wiring, connectors for damage or corrosion.
Diagnose and repair OBD code C0109 by checking for a faulty ABS module, open/shorted harness, or poor electrical connection. Inspect wiring and connectors for damage.
Wrap Up
If your ABS warning light is illuminated and you retrieve OBDII code c0109, it may indicate a fault in the right front wheel speed sensor circuit.
This could be caused by a damaged wheel speed sensor, faulty wiring connections, or a corroded sensor connector.
To address OBDII code c0109, begin by inspecting the wiring harness and connectors related to the right front wheel speed sensor.
Look for any signs of damage, corrosion, or loose connections.
Test the sensor itself for proper operation and replace if necessary.
