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Engine-Codes – Generic – P0958

P0958 Code - Auto Shift Manual Mode Circuit High

Quick Answer

The P0958 code indicates a problem with the auto shift manual mode circuit being too high. Common causes include Faulty auto shift manual mode switch, Damaged wiring or connectors in the circuit, Malfunctioning transmission control module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0958 indicates Auto Shift Manual Mode Circuit High.
Common causes
Common causes include Faulty auto shift manual mode switch, Damaged wiring or connectors in the circuit, Malfunctioning transmission control module.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P0958 Description

The P0958 code indicates a problem with the auto shift manual mode circuit being too high. This code is typically found in vehicles with automatic transmissions that have a manual mode option. The manual mode allows the driver to manually shift gears without the need for a clutch pedal. When this code is triggered, it means that the vehicle's computer has detected a high voltage in the circuit that controls the manual mode, indicating a potential issue with the system.

OBDII Code P0958 - Auto Shift Manual Mode Circuit High
P0958 Code - Auto Shift Manual Mode Circuit High

Common Causes of P0958

  1. Faulty auto shift manual mode switch
  2. Damaged wiring or connectors in the circuit
  3. Malfunctioning transmission control module
  4. Corrosion or moisture in the circuit
  5. Electrical issues such as a blown fuse

Symptoms of P0958

  1. Inability to shift gears manually in manual mode
  2. Erratic shifting in manual mode
  3. Warning light illuminated on the dashboard
  4. Decreased fuel efficiency
  5. Poor acceleration

How to Fix P0958

  1. Diagnose the problem by using a scan tool to retrieve the trouble code and inspecting the auto shift manual mode circuit for any visible damage.
  2. Test the auto shift manual mode switch and replace if faulty.
  3. Check the wiring and connectors for any signs of damage or corrosion, repairing or replacing as needed.
  4. Inspect the transmission control module for any malfunctions and replace if necessary.
  5. Clear the trouble code from the vehicle's computer and test the manual mode function to ensure proper operation.

Cost to Fix P0958

The typical repair costs for addressing the P0958 code can vary depending on the specific cause of the issue. On average, the parts and labor for this repair can range from $200 to $500. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your vehicle make and model.

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Code P0958 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0958 Code

1. What does the OBDII code P0958 mean?

P0958 indicates an issue with the Auto Shift Manual Mode Circuit, specifically detecting a high voltage condition.

2. What are the common symptoms of code P0958?

Symptoms may include the inability to use manual shift mode, illuminated check engine light, erratic shifting, or the transmission being stuck in a specific gear.

3. What causes the P0958 code?

Common causes include a faulty manual shift switch, damaged wiring or connectors in the circuit, a malfunctioning transmission control module (TCM), or shorts in the circuit.

4. Can I still drive with the P0958 code?

While it may be possible to drive, you could experience limited shifting functionality or reduced performance. Driving without addressing the issue may lead to further damage.

5. How is the P0958 code diagnosed?

Diagnosis typically involves inspecting the manual shift switch, checking for wiring or connector damage, testing the circuit for shorts, and verifying the TCM functionality.

6. How do I fix the P0958 code?

Repairs may include replacing the manual shift switch, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the TCM if necessary.

7. How much does it cost to repair code P0958?

Repair costs can vary widely depending on the exact cause, ranging from $50 for simple wiring repairs to $500 or more for TCM replacement.

8. Can a low battery cause the P0958 code?

While a low battery is not a common cause, electrical issues such as voltage irregularities could contribute to triggering the code.

9. Will clearing the code fix the P0958 issue?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.

10. What happens if I ignore the P0958 code?

Ignoring the code can lead to worsening transmission issues, reduced drivability, and potential damage to other components over time.

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