C1159 – OBD-II DTC

OBD-II DTC C1159 – Hydraulic Fluid Pressure/ Flow Circuit Short to Gnd

DTC C1159 meaning

DTC C1159 refers to a diagnostic trouble code indicating a short circuit to ground in the hydraulic fluid pressure or flow circuit. This code is typically associated with the vehicle’s anti-lock braking system (ABS) or traction control system. When the system detects an abnormal voltage level, it triggers this code to alert the technician of a potential issue in the hydraulic pressure circuit.

DTC C1159 symptoms

Common symptoms associated with DTC C1159 may include:

• Illumination of the ABS warning light on the dashboard
• Loss of ABS functionality
• Increased stopping distances
• Unusual brake pedal feel or behavior
• Potential activation of the traction control warning light

DTC C1159 causes

Several factors can lead to the triggering of DTC C1159, including:

• Damaged or frayed wiring in the hydraulic pressure circuit
• Faulty hydraulic pressure sensor
• Corrosion or poor connections in the electrical circuit
• Malfunctioning ABS control module
• Fluid leaks affecting hydraulic pressure

DTC C1159 seriousness

DTC C1159 is considered a serious issue as it can affect the vehicle’s braking performance. The ABS system is crucial for maintaining control during emergency braking situations. If left unaddressed, this code can lead to compromised safety and increased risk of accidents.

How to diagnose DTC C1159

To diagnose DTC C1159, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the C1159 code.
2. Inspect the wiring and connectors in the hydraulic pressure circuit for damage or corrosion.
3. Check the hydraulic pressure sensor for proper operation.
4. Test the ABS control module for faults.
5. Perform a visual inspection for fluid leaks in the braking system.
6. Clear the code and perform a road test to see if the code reappears.

How to fix DTC C1159 step-by-step instructions

To fix DTC C1159, follow these steps:

1. Repair or replace any damaged wiring or connectors in the hydraulic pressure circuit.
2. Replace the faulty hydraulic pressure sensor if it is not functioning correctly.
3. Clean or repair any corroded connections in the electrical circuit.
4. If the ABS control module is faulty, consider replacing it.
5. Address any fluid leaks in the braking system to restore proper hydraulic pressure.
6. After repairs, clear the DTC using an OBD-II scanner and perform a road test to ensure the issue is resolved.

How to erase DTC C1159

To erase DTC C1159, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Access the diagnostic menu on the scanner and select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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