AutoCodes – Chevrolet – P0989 Chevrolet

P0989 Chevrolet Code - Transmission Fluid Pressure Switch 5 Circuit Low Voltage

Quick Answer

The Transmission Fluid Pressure (TFP) switch 5 is part of the Transmission Control Solenoid Valve Assembly, which has no serviceable parts. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly. 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: P0989 Chevrolet indicates Transmission Fluid Pressure Switch 5 Circuit Low Voltage.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly.
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 7,048

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0989 Chevrolet Description

The Transmission Fluid Pressure (TFP) switch 5 is part of the Transmission Control Solenoid Valve Assembly, which has no serviceable parts. The Transmission Control Module (TCM) supplies a signal circuit to the TFP switch 5. The TFP switch 5 has an internal case ground. TFP switch 5 is normally closed or LOW. When oil pressure is present at the TFP switch 5, the switch is open or HIGH. The normally high pressure control (PC) solenoid 3 controls pressure to the R1/4-5-6 clutch regular valve. The TCM monitors the TFP switch 5 signal circuit to determine the position of the R1/4-5-6 clutch regulator valve. When the low and reverse clutch and 4-5-6 clutch are commanded OFF, pressure is present on the TFP switch 5. When the low and reverse clutch or the 4-5-6 clutch is commanded ON, the R1/4-5-6 clutch regulator valve moves and pressure to the TFP switch 5 is exhausted through the R1/4-5-6 clutch regulator valve. The Diagnostic Trouble Code (DTC) will be set when the TCM detects that the TFP switch 5 signal voltage remains LOW after the 4-5-6 clutch transitions from a HIGH pressure state to a LOW pressure state. The TCM counts each incident. The DTC sets when 18 counts are accumulated.

OBDII Code P0989 Chevrolet - Transmission Fluid Pressure Switch 5 Circuit Low Voltage - AutoCodes.com — P0989 Chevrolet Code - Transmission Fluid Pressure Switch 5 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0989 Chevrolet?

Low transmission fluid level
Dirty transmission fluid
Faulty Transmission Control Solenoid Valve Assembly
Transmission Control Solenoid Valve Assembly harness is open or shorted
Transmission Control Solenoid Valve Assembly circuit poor electrical connection

How to Fix the DTC P0989 Chevrolet?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0989 Chevrolet 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.

Need more information about the P0989 Chevrolet code?

Need more information on how to fix the P0989 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Chevrolet Models

P0989 2014 Chevrolet Silverado — Transmission Fluid Pressure Switch 5 Circuit Low Voltage
P0989 2015 Chevrolet Silverado — Transmission Fluid Pressure Switch 5 Circuit Low Voltage
P0989 2016 Chevrolet Silverado — Transmission Fluid Pressure Switch 5 Circuit Low Voltage
P0989 2017 Chevrolet Silverado — Transmission Fluid Pressure Switch 5 Circuit Low Voltage
P0989 2018 Chevrolet Silverado — Transmission Fluid Pressure Switch 5 Circuit Low Voltage

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 P0989 Chevrolet Code

1. What are the common symptoms of OBDII code P0989 in a Chevrolet related to Transmission Fluid Pressure Switch 5 Circuit Low Voltage?

The common symptoms include harsh shifting, transmission slipping, delayed engagement, and in some cases, the transmission may go into "limp mode."

2. What could be causing the OBDII code P0989 in a Chevrolet indicating Transmission Fluid Pressure Switch 5 Circuit Low Voltage?

Possible causes include a faulty transmission fluid pressure switch, damaged wiring or connectors, low transmission fluid level, or a malfunctioning transmission control module.

3. How can I diagnose the OBDII code P0989 in my Chevrolet related to Transmission Fluid Pressure Switch 5 Circuit Low Voltage?

Diagnosis typically involves using a scan tool to retrieve the code, checking the transmission fluid level and condition, inspecting the wiring and connector for damage, and testing the transmission pressure switch for proper operation.

4. Can I continue driving my Chevrolet with the OBDII code P0989 indicating Transmission Fluid Pressure Switch 5 Circuit Low Voltage?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the transmission. It's best to address the issue promptly.

5. How can I repair the OBDII code P0989 in my Chevrolet related to Transmission Fluid Pressure Switch 5 Circuit Low Voltage?

Repair options may include replacing the faulty transmission fluid pressure switch, repairing or replacing damaged wiring or connectors, ensuring the correct transmission fluid level, and resetting the trouble code.

6. Will resetting the OBDII code P0989 in my Chevrolet related to Transmission Fluid Pressure Switch 5 Circuit Low Voltage solve the issue?

Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear. It's important to diagnose and repair the root cause of the problem.

7. How much does it typically cost to repair the OBDII code P0989 indicating Transmission Fluid Pressure Switch 5 Circuit Low Voltage in a Chevrolet?

The cost of repairs can vary depending on the exact cause of the issue and labor rates in your area. It's best to consult with a professional mechanic for an accurate estimate.

8. Are there any preventive measures I can take to avoid encountering the OBDII code P0989 in my Chevrolet related to Transmission Fluid Pressure Switch 5 Circuit Low Voltage?

Regular maintenance, including checking and changing the transmission fluid as recommended by the manufacturer, can help prevent issues that may trigger this trouble code.

9. Can a DIY enthusiast with some automotive experience repair the OBDII code P0989 in a Chevrolet related to Transmission Fluid Pressure Switch 5 Circuit Low Voltage?

While some simple tasks like checking the transmission fluid level can be done by DIY enthusiasts, diagnosing and repairing complex transmission issues typically require specialized tools and expertise best handled by a professional mechanic.

10. How urgent is it to address the OBDII code P0989 in my Chevrolet related to Transmission Fluid Pressure Switch 5 Circuit Low Voltage?

It is recommended to address this issue promptly to prevent potential damage to the transmission and ensure the safe and smooth operation of your vehicle.