AutoCodes – Chevrolet – P0989 2015 Chevrolet Silverado

P0989 2015 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 2015 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 469

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 Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0989 2015 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 2015 Chevrolet Silverado - Transmission Fluid Pressure Switch 5 Circuit Low Voltage - AutoCodes.com — P0989 2015 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 5 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0989 2015 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 2015 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 2015 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 2015 Chevrolet Silverado code?

Need more information on how to fix the P0989 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0989 2015 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 2015 Chevrolet Silverado Code

1. What does the OBDII code P0989 mean for a 2015 Chevrolet Silverado?

P0989 indicates a problem with the Transmission Fluid Pressure Switch 5 Circuit, specifically low voltage detected by the vehicle's control module.

2. What are the common symptoms of code P0989?

Symptoms may include erratic or delayed shifting, transmission slipping, and activation of the check engine light.

3. What causes code P0989 in a 2015 Chevrolet Silverado?

Common causes include a faulty transmission fluid pressure switch, damaged wiring or connectors in the circuit, or issues with the transmission control module (TCM).

4. Can driving with code P0989 damage my transmission?

Yes, prolonged driving with this code can lead to transmission damage due to improper fluid pressure regulation affecting shifting performance.

5. How do I diagnose code P0989?

Start by inspecting the wiring and connectors for damage or corrosion. If they are intact, test the transmission pressure switch and circuit for proper functionality.

6. How do you fix code P0989?

Repairs may involve replacing the transmission fluid pressure switch, repairing damaged wiring or connectors, or reprogramming or replacing the transmission control module.

7. Is code P0989 specific to the 2015 Chevrolet Silverado?

No, this code can occur in other vehicles with similar transmission systems, but the diagnostic and repair process may vary.

8. How much does it cost to repair code P0989?

Repair costs can range from $150 to $500, depending on whether the issue is with the switch, wiring, or control module.

9. Can low transmission fluid cause code P0989?

While low fluid is not a direct cause, it can lead to transmission issues that may trigger this code, so checking fluid levels is recommended.

10. Do I need a mechanic to fix code P0989?

If youâ€™re experienced with car repairs, you can attempt to fix it yourself; otherwise, itâ€™s best to seek professional assistance to avoid further damage.