OBD code C1091 indicates a fault in the ABS Brake Lamp circuit.
Symptoms include the ABS Warning Light and Engine Light being illuminated.
Causes may include a faulty ABS Brake Lamp, open/shorted harness, or poor electrical connection.
This issue is serious as it affects the vehicle’s braking system.
To fix, inspect and repair any damaged components or wiring connections related to the ABS Brake Lamp circuit.
| 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 c1091 OBD Code
The vehicle displays an ABS warning light on the dashboard.
- With OBD code C1091, symptoms may include: AntiLock Brake System (ABS) Warning Light ON.
- Engine Light ON (or Service Engine Soon Warning Light).
- Loss of ABS functionality.
- Strange noises coming from the ABS module.
- Difficulty braking in certain conditions.
Causes of the c1091 OBD Code
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Possible issues related to fault code C1091 include ABS sensor malfunction or wiring problems.
- C1091 can be caused by a faulty ABS Brake Lamp.
- An open or shorted ABS Brake Lamp harness.
- A poor electrical connection in the ABS Brake Lamp circuit.
Fixing Error Code c1091 Step By Step
Resolve fault code C1091 by inspecting the ABS pump motor circuit for potential issues.
- To fix OBDII code C1091, first, review the possible causes related to this code.
- Visually examine the wiring harness and connectors associated with the ABS system.
- Check for any damaged components or signs of wear.
- Inspect the connector pins for any issues like being broken, bent, pushed out, or corroded.
- Repair or replace any damaged wiring or connectors found during the inspection.
- Clear the fault code using a scan tool and test drive the vehicle to ensure the issue has been resolved.
- If the code returns, further diagnostics may be necessary to pinpoint the exact cause of the C1091 fault.
Cost Of Fixing c1091 Fault Code
Diagnosing and repairing fault code C1091 may involve inspecting and servicing the vehicle’s ABS system components.
The cost to diagnose and fix OBD code C1091 depends on the estimated 1. 0hour repair time.
Labor rates usually range from $75 to $150 per hour.
The total cost will vary based on shop rates, complexity of the issue, and any additional parts or services needed.
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Details of the c1091 OBD Code
C1091 indicates a fault in the ABS hydraulic pump motor circuit.
OBD code C1091 means ABS Hydraulic Pump Motor Circuit Failure.
This code is triggered by the ABS control module when it detects a malfunction in the hydraulic pump motor circuit.
The ABS system uses this motor to build hydraulic pressure for the antilock braking system.
When the control module detects an issue with the motor circuit, it sets code C1091 to indicate the problem.
Mechanic’s Tech Notes
Code C1091 indicates an issue with the brake fluid level sensor circuit.
OBDII code C1091 typically indicates a fault with the ABS hydraulic pump motor circuit.
To diagnose this, use a multimeter to check power and ground connections to the ABS module.
Verify communication between the ABS module and other control modules using a scan tool over the CAN network.
Inspect the wiring harness and connectors for any damage, corrosion, or loose connections.
If everything looks good, the issue may lie within the ABS module itself, requiring further testing or potential replacement.
Remember to clear the code after any repairs are made to see if it returns.
FAQ
Common symptoms of OBD code C1091 include ABS Warning Light and Engine Light ON. Causes may be a faulty ABS Brake Lamp or related wiring issues. Fix: Inspect and repair wiring connections.
OBD code C1091 is typically caused by a faulty ABS brake lamp, open/shorted harness, or poor electrical connection. Inspect and repair affected components.
Diagnose OBD code C1091 by checking ABS Brake Lamp, harness, and connections for faults. Inspect for damage, corrosion, or poor connections. Fix as needed.
Wrap Up
If your ABS warning light is on and you see OBDII code c1091, it may indicate a fault in the hydraulic pump motor circuit of the ABS system.
This could be caused by a malfunctioning hydraulic pump motor, damaged wiring, or poor electrical connections.
To address OBDII code c1091, start by inspecting the wiring harness and connectors related to the hydraulic pump motor.
Check for any signs of damage, corrosion, or loose connections.
Test the hydraulic pump motor for proper operation and replace it if necessary to resolve the issue.
