C1189 – OBD-II DTC

OBD-II DTC C1189 – Brake Fluid Level Sensor Input Short Circuit To Ground

DTC C1189 meaning

DTC C1189 refers to a diagnostic trouble code indicating a short circuit to ground in the brake fluid level sensor input. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components to ensure proper operation. The brake fluid level sensor is crucial for alerting the driver when the brake fluid level is low, which can affect braking performance and safety.

DTC C1189 symptoms

Common symptoms associated with DTC C1189 may include:

• Illuminated brake warning light on the dashboard
• Inconsistent or erratic readings of brake fluid level
• Potential loss of braking performance if fluid is low
• Possible activation of other warning lights related to the braking system

DTC C1189 causes

Several factors can lead to the occurrence of DTC C1189, including:

• Faulty brake fluid level sensor
• Wiring issues, such as damaged or frayed wires
• Corrosion or poor connections in the sensor circuit
• Short circuit in the wiring harness
• Low brake fluid level due to leaks or evaporation

DTC C1189 seriousness

DTC C1189 is considered a serious issue as it directly relates to the vehicle’s braking system. If the brake fluid level is not accurately monitored, it can lead to brake failure, posing a significant safety risk to the driver and others on the road. Immediate attention is recommended to diagnose and resolve the issue.

How to diagnose DTC C1189

To diagnose DTC C1189, follow these steps:

• Use an OBD-II scanner to confirm the presence of the C1189 code.
• Inspect the brake fluid level to ensure it is within the recommended range.
• Check the brake fluid level sensor for any visible damage or corrosion.
• Examine the wiring and connectors for signs of wear, fraying, or short circuits.
• Test the brake fluid level sensor with a multimeter to verify its functionality.
• Clear the code and perform a road test to see if the code reappears.

How to fix DTC C1189 step-by-step instructions

To fix DTC C1189, follow these step-by-step instructions:

1. Ensure the vehicle is safely parked and the ignition is off.
2. Check the brake fluid level and top it off if necessary.
3. Inspect the brake fluid level sensor for any physical damage.
4. Examine the wiring harness and connectors for any signs of damage or corrosion.
5. If the sensor is faulty, replace it with a new one.
6. Repair any damaged wiring or connections as needed.
7. Reconnect all components and ensure everything is secure.
8. Clear the DTC using an OBD-II scanner.
9. Perform a road test to confirm that the issue is resolved and the code does not reappear.

How to erase DTC C1189

To erase DTC C1189, follow these steps:

• Connect an OBD-II scanner to the vehicle’s diagnostic port.
• Turn on the ignition without starting the engine.
• Access the diagnostic menu on the scanner.
• Select the option to clear or erase trouble codes.
• Confirm the action and wait for the scanner to complete the process.
• Disconnect the scanner and start the vehicle to ensure the code does not return.

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