C1958 – OBD-II DTC

OBD-II DTC C1958 – Dynamic Stability Control Valve LF Circuit Failure

DTC C1958 meaning

DTC C1958 refers to a fault in the Dynamic Stability Control (DSC) system, specifically indicating a failure in the Left Front (LF) circuit of the DSC valve. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components to ensure proper functionality. The DSC system is crucial for maintaining vehicle stability during dynamic driving conditions by controlling wheel slip and traction.

DTC C1958 symptoms

Common symptoms associated with DTC C1958 may include:

• Illumination of the warning light on the dashboard
• Reduced effectiveness of the stability control system
• Increased wheel slip during acceleration or cornering
• Unusual noises from the DSC system
• Potential activation of the anti-lock braking system (ABS) warning light

DTC C1958 causes

Several factors can lead to the occurrence of DTC C1958, including:

• Faulty DSC valve or actuator
• Wiring issues, such as shorts or open circuits in the LF circuit
• Corrosion or damage to electrical connectors
• Malfunctioning wheel speed sensors
• Software issues within the vehicle’s control module

DTC C1958 seriousness

DTC C1958 is considered a serious issue as it directly affects the vehicle’s stability control system. If left unaddressed, it can lead to:

• Increased risk of loss of control during adverse driving conditions
• Potential for accidents due to compromised vehicle handling
• Failure of the vehicle to pass emissions tests or safety inspections

How to diagnose DTC C1958

To diagnose DTC C1958, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the C1958 code.
2. Inspect the wiring and connectors associated with the DSC valve for damage or corrosion.
3. Check the DSC valve and actuator for proper operation.
4. Test the wheel speed sensors for functionality and correct readings.
5. Review the vehicle’s service history for any previous repairs related to the DSC system.
6. Clear the code and perform a road test to see if the code reappears.

How to fix DTC C1958 step-by-step instructions

To fix DTC C1958, follow these steps:

1. Inspect and repair any damaged wiring or connectors in the LF circuit.
2. Replace the faulty DSC valve or actuator if necessary.
3. Ensure that all wheel speed sensors are functioning correctly and replace any that are defective.
4. Update the vehicle’s control module software if applicable.
5. Clear the DTC using an OBD-II scanner.
6. Perform a road test to verify that the issue has been resolved and that the code does not return.

How to erase DTC C1958

To erase DTC C1958, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the vehicle’s ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the codes.
5. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.