OBD code C1803 indicates an issue with the Electric Parking Brake Control Module (EPBCM).
Symptoms include the ABS and Engine warning lights being illuminated.
This is usually caused by a faulty parking brake motor, open/shorted harness, or poor electrical connection.
It’s a moderate issue that can affect braking performance.
To fix, inspect the wiring harness, connectors, and EPBCM for any damage or corrosion.
| 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 c1803 OBD Code
The vehicle displays an ABS warning light on the dashboard with fault code C1803 stored.
- 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 from the ABS system.
Causes of the c1803 OBD Code
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Possible triggers for fault code C1803 include issues with the steering angle sensor or its wiring.
- C1803 can be caused by a faulty Parking Brake Motor.
- A Parking Brake Motor harness that is open or shorted.
- A Parking Brake Motor circuit with poor electrical connection.
- A faulty Electric Parking Brake Control Module (EPBCM).
Fixing Error Code c1803 Step By Step
To address fault code C1803, inspect the steering angle sensor for proper operation and calibration.
- To fix OBDII code C1803, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, check the wheel speed sensor for proper operation and connection.
- Inspect the ABS module for any signs of damage or corrosion.
- Clear the fault codes and perform a road test to verify if the issue has been resolved.
- If the problem persists, consider replacing the faulty wheel speed sensor or ABS module as necessary.
Cost Of Fixing c1803 Fault Code
The repair for fault code C1803 may involve replacing the steering angle sensor in the vehicle.
The cost to diagnose and fix OBD code C1803 depends on the estimated 1. 0hour repair time.
Labor rates range from $75 to $150 per hour, so the general cost could be between $75 and $150. Factors like shop rates and complexity can influence the final cost.
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Details of the c1803 OBD Code
C1803 code indicates an issue with the steering angle sensor in the vehicle’s electronic stability control system.
OBD code C1803 means that there is a fault with the steering angle sensor.
This sensor is responsible for monitoring the steering wheel position and rate of turn.
The signal involved is the data sent by the steering angle sensor to the Electronic Control Unit (ECU) of the vehicle.
When the ECU detects an issue with the steering angle sensor, it triggers the C1803 fault code.
Mechanic’s Tech Notes
Code C1803 relates to an issue with the steering angle sensor in the vehicle’s electronic stability control system.
OBDII code C1803 relates to a transmission control module (TCM) power supply issue.
To diagnose, use a multimeter to check TCM power and ground connections for proper voltage and continuity.
Utilize a scan tool to confirm TCM communication over the Controller Area Network (CAN) bus.
Visually inspect wiring harnesses and connectors for damage, focusing on pin connections for signs of corrosion, bending, or breakage.
If no visible issues are found, consider reprogramming the TCM.
FAQ
OBD code C1803 indicates an issue with the Parking Brake Motor circuit. Check for faults in the motor, harness, connectors, and EPBCM for repair.
Common symptoms of OBD code C1803 include ABS warning light and engine light on. Possible causes are faulty parking brake motor or harness issues. Inspect and repair wiring connections.
Diagnose OBD code C1803 by checking for faulty parking brake motor, harness issues, or EPBCM faults. Inspect wiring, connectors, and components for damage or corrosion.
Wrap Up
If your ABS warning light is illuminated and you retrieve OBDII code c1803, it may indicate a fault in the ABS hydraulic pump motor circuit.
This could be caused by a malfunctioning ABS hydraulic pump motor, damaged wiring, or poor electrical connections.
To address OBDII code c1803, start by inspecting the wiring harness and connectors related to the ABS hydraulic pump motor.
Look for any signs of damage, corrosion, or loose connections.
Test the ABS hydraulic pump motor for proper operation and replace it if necessary.
