AutoCodes – Chevrolet – P0990 2015 Chevrolet Silverado

P0990 2015 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 5 Circuit High 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: P0990 2015 Chevrolet Silverado indicates Transmission Fluid Pressure Switch 5 Circuit High 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 288

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 P0990 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 HIGH after the 4-5-6 clutch transitions from a LOW pressure state to a HIGH pressure state. The TCM counts each incident. The DTC sets when 15 counts are accumulated.

OBDII Code P0990 2015 Chevrolet Silverado - Transmission Fluid Pressure Switch 5 Circuit High Voltage - AutoCodes.com — P0990 2015 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 5 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0990 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 P0990 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 P0990 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 P0990 2015 Chevrolet Silverado code?

Need more information on how to fix the P0990 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0990 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 P0990 2015 Chevrolet Silverado Code

1. What does the OBDII code P0990 mean on a 2015 Chevrolet Silverado?

P0990 indicates a high voltage issue in the Transmission Fluid Pressure Switch 5 Circuit, which is responsible for monitoring hydraulic pressure in the transmission.

2. What are the common symptoms of a P0990 code in a 2015 Chevrolet Silverado?

Symptoms may include erratic shifting, the transmission stuck in one gear, reduced fuel efficiency, or the check engine light illuminating.

3. What causes the P0990 code on a 2015 Chevrolet Silverado?

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

4. Can driving with the P0990 code damage my 2015 Chevrolet Silverado?

Yes, continuing to drive with this code can lead to transmission issues, poor performance, or further damage to the transmission system.

5. How do I diagnose the P0990 code on my 2015 Chevrolet Silverado?

Diagnose the code by inspecting the wiring and connectors for damage, testing the transmission fluid pressure switch, and using a scan tool to monitor live data from the TCM.

6. What repairs are typically required for a P0990 code?

Repairs may include replacing the transmission fluid pressure switch, repairing damaged wiring or connectors, or reprogramming or replacing the TCM if necessary.

7. How much does it cost to fix a P0990 code on a 2015 Chevrolet Silverado?

Costs vary depending on the repair, but replacing a transmission fluid pressure switch typically ranges from $150 to $300, including parts and labor.

8. Can low or dirty transmission fluid cause the P0990 code?

While not a direct cause, low or dirty transmission fluid can contribute to transmission performance issues, so itâ€™s important to check and maintain proper fluid levels.

9. Do I need special tools to fix the P0990 code on a 2015 Chevrolet Silverado?

Yes, diagnosing and repairing this code may require a scan tool capable of reading transmission data, as well as a multimeter for testing electrical components.

10. Can a P0990 code be cleared without fixing the problem?

Clearing the code without fixing the underlying issue will likely result in the code returning and may lead to further transmission problems.