AutoCodes – Pontiac – P1758 Pontiac

P1758 Pontiac Code - Transmission Range Switch Indicates Drive Without Drive Ratio

Quick Answer

The Transmission Range (TR) switch is part of the park/neutral position and back-up lamp switch assembly and is mounted on the transmission manual shaft. Common causes include Faulty Transmission Range (TR) Switch, Transmission Range Switch harness is open or shorted, Transmission Range Switch circuit poor electrical connection. 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: P1758 Pontiac indicates Transmission Range Switch Indicates Drive Without Drive Ratio.
Common causes: Common causes include Faulty Transmission Range (TR) Switch, Transmission Range Switch harness is open or shorted, Transmission Range Switch circuit poor electrical connection.
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.

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Code Popularity 376

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Feb 03, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1758 Pontiac Description

The Transmission Range (TR) switch is part of the park/neutral position and back-up lamp switch assembly and is mounted on the transmission manual shaft. The TR switch is a multi-signal switch. The fuse block supplies ignition voltage to the TR switch on four signal circuits, A, B, C, and P. Each gear selector lever position powers two or more of the signal circuits in a unique pattern. In order to determine the gear range selected by the driver, the TCM compares the voltage combination on the signal circuits to a TR switch combination table stored in memory. Refer to Transmission Range Switch Logic. When the TCM detects the combination of TR switch signals for a forward range and the vehicle is not moving, Diagnostic Trouble Code (DTC) P1758 sets. DTC P1758 is a type B DTC.

OBDII Code P1758 Pontiac - Transmission Range Switch Indicates Drive Without Drive Ratio - AutoCodes.com — P1758 Pontiac Code - Transmission Range Switch Indicates Drive Without Drive Ratio

What does this mean?

What are the Possible Causes of the DTC P1758 Pontiac?

Faulty Transmission Range (TR) Switch
Transmission Range Switch harness is open or shorted
Transmission Range Switch circuit poor electrical connection

How to Fix the DTC P1758 Pontiac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1758 Pontiac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 P1758 Pontiac Code

1. What are the common symptoms of OBDII code P1758 in a Pontiac related to the Transmission Range Switch?

Common symptoms include difficulty shifting gears, harsh shifting, transmission slipping, and the transmission staying in one gear.

2. What can cause the OBDII code P1758 on a Pontiac indicating "Transmission Range Switch Indicates Drive Without Drive Ratio"?

The code P1758 is typically triggered by a faulty transmission range switch or a misadjusted switch that is not properly indicating the drive position.

3. How can I diagnose the OBDII code P1758 on my Pontiac related to the Transmission Range Switch?

Diagnosing the code involves checking the transmission range switch for proper operation, ensuring it is adjusted correctly, and scanning for any related transmission issues.

4. Can a faulty transmission range switch be repaired, or does it need to be replaced in the case of code P1758 on a Pontiac?

In most cases, a faulty transmission range switch will need to be replaced rather than repaired to ensure proper functionality and to prevent the recurrence of the P1758 code.

5. Are there any DIY tips for addressing the OBDII code P1758 in a Pontiac indicating an issue with the Transmission Range Switch?

DIY tips include checking the wiring connections to the transmission range switch, ensuring it is securely mounted, and consulting the vehicle's service manual for specific troubleshooting steps.

6. What is the significance of the "Drive Without Drive Ratio" part of the OBDII code P1758 on a Pontiac?

The "Drive Without Drive Ratio" aspect of the code indicates that the transmission range switch is not properly detecting the drive position, potentially leading to transmission issues.

7. How urgent is it to address the OBDII code P1758 related to the Transmission Range Switch in a Pontiac?

It is important to address the code promptly to prevent further damage to the transmission and ensure the vehicle operates safely and efficiently.

8. Can a faulty transmission range switch cause other issues besides triggering the OBDII code P1758 in a Pontiac?

Yes, a faulty transmission range switch can cause issues such as incorrect gear selection, starting problems, and safety concerns due to the vehicle not properly recognizing the drive position.

9. Is it necessary to reset the OBDII code P1758 after repairing the Transmission Range Switch issue in a Pontiac?

Yes, it is recommended to clear the code after repairing the transmission range switch issue to reset the vehicle's computer system and ensure the problem has been resolved.

10. What is the typical cost to repair the OBDII code P1758 on a Pontiac caused by a faulty Transmission Range Switch?

The cost of repairing the code P1758 can vary depending on the labor rates and parts prices, but it generally involves replacing the transmission range switch, which may cost a few hundred dollars at a repair shop.