OBD code C1503 indicates an issue with the Tire Pressure Monitoring System (TPMS).
Symptoms include the ABS and TPMS warning lights being illuminated.
This is commonly caused by a faulty tire pressure sensor, open/shorted sensor harness, or poor electrical connection.
While not a critical issue, it can affect vehicle safety.
To fix, inspect the sensor, wiring harness, and connectors 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) |
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Symptoms of the c1503 OBD Code
The vehicle displays a warning light indicating an issue with the brake switch circuit (C1503).
- Symptoms: AntiLock Brake System (ABS) Warning Light ON.
- Tire Pressure Monitor System (TPMS) Warning Light ON.
- Possible loss of ABS functionality.
- Difficulty maintaining traction in slippery conditions.
- Brake pedal may feel different when braking.
Causes of the c1503 OBD Code
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Possible triggers for fault code C1503 include issues with the brake switch or wiring faults.
- C1503 can be caused by a Faulty Tire Pressure Sensor.
- A Tire Pressure Sensor harness that is open or shorted.
- A Tire Pressure Sensor circuit with poor electrical connection.
Fixing Error Code c1503 Step By Step
To resolve fault code C1503, inspect and repair the brake switch circuit as needed.
- To fix OBDII code C1503, start by reviewing the possible causes mentioned above and visually examining the corresponding wiring harness and connectors.
- Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, ensure that the steering angle sensor is securely mounted and functioning correctly.
- If the sensor is faulty, replace it with a new one.
- Clear the fault codes from the vehicle’s computer using a scan tool and test drive the vehicle to verify that the issue has been resolved.
Cost Of Fixing c1503 Fault Code
The repair for fault code C1503 may involve replacing the faulty wheel speed sensor.
The cost to diagnose and fix OBD code C1503 depends on the estimated 1. 0hour repair time.
Labor rates usually range from $75 to $150 per hour, so the general cost could be between $75 and $150. The final cost may vary based on shop rates, complexity of the issue, and any additional parts needed for the repair.
Details of the c1503 OBD Code
C1503 code indicates a faulty brake switch signal in the vehicle’s electronic stability control system.
OBD code C1503 means Brake switch circuit 2 malfunction.
This code is triggered by the Electronic Brake Control Module (EBCM) when it detects a malfunction in the circuit related to the second brake switch.
The brake switch circuit is involved in monitoring the status of the brake pedal position, which is crucial for various vehicle safety systems like traction control, stability control, and cruise control.
If this circuit malfunctions, it can affect the proper operation of these safety systems, potentially compromising vehicle safety.
Mechanic’s Tech Notes
Code C1503 indicates a fault in the brake switch circuit.
OBDII code C1503 relates to a communication error with the transmission control module (TCM).
To diagnose, check TCM power and ground using a multimeter.
Verify TCM response over the Controller Area Network (CAN) network with a scan tool.
Visually inspect wiring harness and connectors for damage, focusing on broken, bent, or corroded pins.
Reflash the TCM if necessary.
This procedure helps ensure proper power supply, ground connection, and communication integrity between the TCM and other modules.
FAQ
OBD code C1503 indicates an issue with the Tire Pressure Sensor system. Check for faulty sensor, wiring harness issues, or poor electrical connections. Inspect and repair as needed.
Common symptoms for OBD code C1503 include ABS warning light and TPMS warning light on. Causes may be faulty tire pressure sensor or related wiring issues. Fix: Inspect sensor and wiring.
Diagnose OBD code C1503 by checking for faulty tire pressure sensor, open/shorted harness, or poor connection. Inspect wiring and connectors for damage or corrosion.
Wrap Up
If your ABS warning light is illuminated and you retrieve OBDII code C1503, it may indicate a fault with the front right 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 C1503, begin by inspecting the wiring harness and connectors related to the front right wheel speed sensor.
Look for any signs of damage, corrosion, or loose connections.
Test the sensor itself for proper operation and replace if necessary to resolve the issue.
