OBD code C1940 indicates a fault in the Front Active Stabilizer Control ECU system.
Symptoms include the ABS warning light and engine light being illuminated.
The issue is commonly caused by a faulty ECU or wiring harness issues.
While not a critical problem, it should be addressed promptly.
To fix, inspect the ECU, wiring harness, and connectors for any damage or poor connections.
| 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 c1940 OBD Code
The vehicle displays a warning light indicating a fault with the c1940 code stored in the system.
- 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 when braking.
- Unusual noises coming from the ABS system.
Causes of the c1940 OBD Code
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Possible triggers for fault code C1940 include issues with the steering angle sensor or related wiring.
- C1940 can be caused by a faulty Front Active Stabilizer Control ECU.
- A Front Active Stabilizer Control ECU harness that is open or shorted.
- A Front Active Stabilizer Control ECU circuit with poor electrical connection.
Fixing Error Code c1940 Step By Step
Address the wiring issue causing fault code C1940 by inspecting and repairing any damaged circuits.
- To fix OBDII code C1940, first, review the possible causes related to this code.
- Visually examine the wiring harness and connectors associated with the ABS control module.
- Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- If no visible issues are found, perform a diagnostic scan tool test to communicate with the ABS module.
- Reset the module if necessary or replace it if the issue persists.
Cost Of Fixing c1940 Fault Code
Diagnosing and repairing fault code c1940 may involve inspecting and testing the vehicle’s steering angle sensor system.
The cost to diagnose and fix OBD code C1940 depends on the estimated 1. 0hour repair time.
Labor rates usually range from $75 to $150 per hour, so the total cost could be between $75 and $150. Actual cost may vary based on shop rates and the complexity of the repair.
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Details of the c1940 OBD Code
Code C1940 relates to a fault in the airbag module.
OBD code C1940 means Steering Angle Sensor 1 Circuit Failure.
This code is triggered by the Electronic Brake Control Module (EBCM) when it detects a malfunction in the circuit related to the steering angle sensor 1. The steering angle sensor provides information about the steering wheel position and rate of turn to various vehicle systems, including the stability control system.
When a circuit failure is detected in this sensor, the EBCM sets code C1940 to indicate the issue with the steering angle sensor 1 circuit.
Mechanic’s Tech Notes
Code C1940 indicates a fault in the air suspension control module on Ford vehicles.
OBDII code C1940 indicates a problem with the Transmission Control Module (TCM) power circuit.
To diagnose this, use a voltmeter to check TCM 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) network to verify its responsiveness.
If the wiring harness and connectors visually appear fine, consider reprogramming or reflashing the TCM as a potential fix.
Remember to inspect connector pins for any damage or corrosion that could be causing the issue.
FAQ
OBD code C1940 indicates an issue with the Front Active Stabilizer Control ECU. Symptoms include ABS and Engine warning lights. Check wiring and connectors for faults.
Common symptoms of OBD code C1940 include ABS warning light and engine light on. Causes may be faulty front active stabilizer control ECU or related wiring issues. Fix: Inspect and repair wiring connections.
Diagnose OBD code C1940 by checking Front Active Stabilizer Control ECU and its wiring for faults. Repair as needed to resolve ABS and Engine Light issues.
Wrap Up
If your vehicle is displaying OBDII code c1940 along with ABS warning lights, it may indicate a fault in the steering angle sensor circuit.
This could be caused by a damaged sensor, faulty wiring connections, or a malfunctioning control module.
To address OBDII code c1940, start by inspecting the wiring harness and connectors related to the steering angle sensor.
Look for any signs of damage, corrosion, or loose connections.
Test the sensor itself for proper operation and consider replacing it if necessary.
Additionally, check the control module for any faults that may be triggering the code.
