The OBD code C1020 for Dodge indicates an issue with the Left Rear Wheel Speed Sensor circuit in the AntiLock Brake System (ABS).
Symptoms include the ABS Warning Light and Engine Light being illuminated.
This is commonly caused by a faulty sensor, wiring harness issues, or problems with the ABS Module.
It is a moderate issue that should be addressed promptly.
To fix it, inspect the sensor, wiring, and connectors for any faults or damage.
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 Dodge c1020 OBD Code
The Dodge C1020 fault code typically triggers when there is an issue with the right rear wheel speed sensor.
- 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 than usual.
- Unusual noises coming from the ABS system.
Causes of the Dodge c1020 OBD Code
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Dodge code C1020 typically indicates a faulty wheel speed sensor or damaged wiring.
- C1020 can be caused by a Faulty Left Rear Wheel Speed Sensor.
- A Left Rear Wheel Speed Sensor harness that is open or shorted.
- A Left Rear Wheel Speed Sensor circuit with poor electrical connection.
- A Faulty AntiLock Brake System (ABS) Module.
Fixing Dodge Error Code c1020 Step By Step
Resolve Dodge C1020 by inspecting the wheel speed sensor circuit for faults and addressing any issues found.
- To fix the Dodge OBDII code C1020, start by reviewing the possible causes mentioned above.
- Visually examine the wiring harness and connectors related to the ABS system.
- Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Test the ABS module for proper operation and communication.
- Reset the ABS module using a scan tool if necessary.
- Consider replacing the ABS module if all other steps do not resolve the issue.
Cost Of Fixing Dodge c1020 Fault Code
The repair for Dodge fault code C1020 typically involves diagnosing and replacing the ABS pump motor circuit.
The cost to diagnose and fix Dodge OBD code C1020 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 Dodge c1020 OBD Code
Dodge fault code C1020 relates to a right rear wheel speed sensor circuit issue.
Dodge OBD code C1020 means Right Rear Wheel Speed Sensor Circuit.
This code is triggered by the AntiLock Brake System (ABS) module when it detects a circuit malfunction in the right rear wheel speed sensor.
The ABS module monitors the speed of each wheel using sensors to ensure proper braking and stability control.
When the right rear wheel speed sensor circuit fails or malfunctions, the C1020 trouble code is set, indicating a problem with the sensor or its wiring.
Mechanic’s Tech Notes
For Dodge C1020, check for faulty wheel speed sensor signals causing ABS system malfunctions.
To diagnose and fix OBDII code C1020 in a Dodge, start by checking the Transmission Control Module (TCM) power and ground using a multimeter.
Verify TCM communication over the Controller Area Network (CAN) using a scan tool.
If the TCM does not respond, reprogramming or reflashing may be necessary.
Visually inspect the wiring harness and connectors for any damage, and check connector pins for signs of corrosion, bending, or breakage.
This thorough inspection can help identify and resolve the issue causing the C1020 fault code.
FAQ
OBD code C1020 in a Dodge indicates an issue with the left rear wheel speed sensor circuit. Check sensor, harness, connections, and ABS module for faults.
Diagnose OBD code C1020 in Dodge by checking left rear wheel speed sensor and harness for faults. Inspect ABS module and connectors for issues.
Common symptoms of OBD code C1020 in a Dodge vehicle include ABS warning light on, engine light on, caused by faulty left rear wheel speed sensor or related issues.

Wrap Up
If your Dodge is displaying OBD code C1020 and you’re experiencing issues with the ABS system, it could be caused by a faulty wheel speed sensor, damaged wiring harness, or a poor connection at the sensor or module.
To address Dodge OBD code C1020, start by inspecting the wheel speed sensor and its wiring for any visible damage.
Test the sensor’s resistance and check for proper voltage supply.
Ensure connectors are clean and securely attached to the sensor and ABS module.
Replace any faulty components as needed.
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