The OBD code C1238 for Toyota indicates a fault in the Right Rear Wheel Speed Sensor Circuit.
Symptoms include the ABS warning light and engine light being illuminated.
Common causes are a faulty sensor, sensor rotor, improper installation, or a faulty Skid Control ECU.
This issue should be addressed promptly to ensure safe braking operation.
A possible fix involves inspecting the sensor, rotor, 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) |
Symptoms of the Toyota c1238 OBD Code
The ABS warning light illuminates on the dashboard in Toyota vehicles with fault code C1238.
- Symptoms: AntiLock Brake System (ABS) Warning Light ON.
- Engine Light ON (or Service Engine Soon Warning Light).
- Possible symptoms include ABS system not functioning properly.
- Brakes may feel different when applied.
- Unusual noises like grinding or clicking when braking.
Causes of the Toyota c1238 OBD Code
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Possible reasons for fault code Toyota C1238 include issues with the steering angle sensor.
- C1238 can be caused by a Faulty Right Rear Speed Sensor.
- A malfunctioning Right Rear Speed Sensor rotor.
- Incorrect Sensor installation.
- A Faulty Skid Control ECU (Brake Actuator Assembly).
Fixing Toyota Error Code c1238 Step By Step
Inspect the brake fluid level and quality, and check for any leaks in the brake system.
- To fix Toyota OBDII code C1238, 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 sensors for proper operation and wiring integrity.
- Inspect the ABS control module for any signs of damage or corrosion.
- If no issues are found with the wiring or components, consider resetting the ABS control module using a scan tool.
- If the problem persists, the ABS control module may need to be replaced with a new one.
Cost Of Fixing Toyota c1238 Fault Code
Repairing fault code C1238 on a Toyota typically involves replacing the ABS hydraulic pump motor.
The cost to diagnose and fix Toyota OBD code C1238 typically ranges from $75 to $150 per hour for labor rates.
With an estimated repair time of 1. 0 hour, the total cost can be around $75 to $150, depending on shop rates and the complexity of the issue.
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Details of the Toyota c1238 OBD Code
Toyota fault code C1238 relates to the ABS hydraulic pump motor circuit malfunction.
OBD code C1238 for Toyota vehicles indicates an issue with the ABS hydraulic pump motor circuit.
This code is triggered by the ABS control module when it detects a malfunction in the hydraulic pump motor circuit.
The ABS control module monitors the signals from various sensors in the ABS system, and when it detects a fault in the hydraulic pump motor circuit, it sets code C1238. This code typically points to a problem with the ABS hydraulic pump motor or its wiring.
Mechanic’s Tech Notes
For Toyota code C1238, check the ABS pump motor circuit for faults or failures.
OBDII code C1238 in a Toyota typically indicates an issue with the TCM (Transmission Control Module).
To diagnose this, you can start by checking the TCM power and ground using a multimeter.
Ensure the voltage levels are within specifications.
Next, use a scan tool to communicate with the TCM over the CAN network.
If there is no response, it could point to a faulty TCM or a wiring issue.
Visually inspect the wiring harness and connectors for any damage, corrosion, or loose connections.
Reflashing the TCM software may also be necessary to resolve the fault.
FAQ
OBD code C1238 in a Toyota means an issue with the right rear speed sensor or related components. Check sensor, rotor, wiring, and connectors for faults.
Common symptoms of OBD code C1238 in a Toyota include ABS warning light and engine light on. Causes may be faulty right rear speed sensor or Skid Control ECU. Fix: Inspect wiring and connectors.
Diagnose and repair OBD code C1238 in your Toyota by checking the right rear speed sensor, rotor, sensor installation, and Skid Control ECU. Inspect wiring and connectors for damage.
Wrap Up
If your Toyota is displaying OBDII code C1238 along with ABS warning lights, it may indicate a malfunction in the right rear wheel speed sensor circuit.
This could be caused by a faulty wheel speed sensor, damaged wiring harness, or poor electrical connection at the sensor or ABS module.
To address Toyota OBDII code C1238, start by inspecting the right rear wheel speed sensor and its wiring for any visible damage.
Test the sensor’s resistance and check for proper voltage supply and ground connections.
Ensure the sensor is securely mounted and the wiring harness is free of any breaks or corrosion.
