AutoCodes – Chevrolet – P0989 2014 Chevrolet Silverado

P0989 2014 Chevrolet Silverado 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 2014 Chevrolet Silverado 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 432

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
Cost to Diagnose
FAQs
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Code P0989 2014 Chevrolet Silverado 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 2014 Chevrolet Silverado - Transmission Fluid Pressure Switch 5 Circuit Low Voltage - AutoCodes.com — P0989 2014 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 5 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0989 2014 Chevrolet Silverado?

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 2014 Chevrolet Silverado?

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 P0989 2014 Chevrolet Silverado 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 2014 Chevrolet Silverado code?

Need more information on how to fix the P0989 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P0989 2014 Chevrolet Silverado Code

1. What does the OBDII code P0989 mean on a 2014 Chevrolet Silverado?

P0989 indicates "Transmission Fluid Pressure Switch 5 Circuit Low Voltage," meaning the transmission control module (TCM) has detected a low voltage issue in the circuit for Pressure Switch 5.

2. What are the common symptoms of the P0989 code on a 2014 Chevrolet Silverado?

Symptoms may include delayed or erratic shifting, the transmission stuck in a single gear (limp mode), the Check Engine Light illuminated, and possibly reduced fuel efficiency.

3. What causes the P0989 code on a 2014 Chevrolet Silverado?

Common causes include a faulty transmission fluid pressure switch, damaged wiring or connectors in the circuit, low transmission fluid levels, or a malfunctioning TCM.

4. Can low transmission fluid cause the P0989 code to appear?

Yes, low or contaminated transmission fluid can affect pressure readings and may trigger the P0989 code.

5. How do I diagnose the P0989 code on my 2014 Chevrolet Silverado?

Start by checking transmission fluid levels and condition. Inspect the wiring and connectors for damage or corrosion. Use a scan tool to monitor transmission pressure switch readings and confirm the fault.

6. How do I fix the P0989 code on a 2014 Chevrolet Silverado?

Repairs may include replacing a faulty transmission fluid pressure switch, repairing damaged wiring, cleaning corroded connectors, or addressing low transmission fluid levels.

7. Is it safe to drive with the P0989 code on my 2014 Chevrolet Silverado?

Itâ€™s not recommended to drive for extended periods with this code, as it can cause further transmission damage or lead to unsafe driving conditions.

8. How much does it cost to repair the P0989 code on a 2014 Chevrolet Silverado?

Repair costs vary depending on the issue. Replacing a transmission fluid pressure switch can cost $150â€“$300, while wiring repairs can cost $50â€“$200. Extensive transmission issues may be more expensive.

9. Can a faulty TCM cause the P0989 code on a 2014 Chevrolet Silverado?

Yes, a malfunctioning TCM can misinterpret or fail to process transmission fluid pressure switch signals, leading to the P0989 code.

10. How can I prevent the P0989 code from occurring on my 2014 Chevrolet Silverado?

Regularly check and maintain transmission fluid levels, inspect wiring and connectors for damage, and address transmission issues promptly to prevent future occurrences.