AutoCodes – Chevrolet – P0873 2014 Chevrolet Silverado

P0873 2014 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 3 Circuit High Voltage

Quick Answer

The transmission fluid pressure switch, also known as the pressure switch manifold, is a multiple switch assembly made up of 3 normally open pressure switches and 1 normally closed pressure switch. 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: P0873 2014 Chevrolet Silverado indicates Transmission Fluid Pressure Switch 3 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 268

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 Aug 02, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0873 2014 Chevrolet Silverado Description

The transmission fluid pressure switch, also known as the pressure switch manifold, is a multiple switch assembly made up of 3 normally open pressure switches and 1 normally closed pressure switch. Pressure switch 1 monitors shift valve 1 positioning, pressure switch 2 monitors shift valve 2 positioning, pressure switch 3 monitors shift valve 3 positioning, and pressure switch 4 monitors the position of the manual selector valve. The TCM provides a signal circuit to each of the pressure switches. The TCM constantly monitors the circuits to determine the position of the shift valves. The position of shift valves 1, 2, and 3 is controlled by 3 normally closed shift solenoids. When energized, shift solenoid 1 directs fluid pressure to shift valve 1, shift solenoid 2 directs fluid pressure to shift valve 2, and shift solenoid 3 directs fluid pressure to shift valve 3, which strokes the shift valves. When a shift valve is stroked, an exhaust passage is blocked and fluid pressure increases, closing the normally open pressure switch. The Diagnostic Trouble Code (DTC) will be set when the TCM detects that transmission fluid pressure switch 3 signal circuit is High when shift solenoid 3 is commanded ON for 1 s.

OBDII Code P0873 2014 Chevrolet Silverado - Transmission Fluid Pressure Switch 3 Circuit High Voltage - AutoCodes.com — P0873 2014 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 3 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0873 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
Faulty Transmission Control Module (TCM)

How to Fix the DTC P0873 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 P0873 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 P0873 2014 Chevrolet Silverado code?

Need more information on how to fix the P0873 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P0873 2014 Chevrolet Silverado Code

1. What does OBDII code P0873 mean for a 2014 Chevrolet Silverado?

P0873 indicates that the Transmission Fluid Pressure Switch 3 circuit is reporting a high voltage condition, which could point to an electrical or hydraulic issue in the transmission.

2. What are the common symptoms of code P0873 in a 2014 Chevrolet Silverado?

Symptoms may include erratic shifting, the transmission stuck in a single gear (limp mode), poor acceleration, or the check engine light being illuminated.

3. What causes code P0873 in a 2014 Chevrolet Silverado?

Common causes include a faulty transmission fluid pressure switch, damaged wiring or connectors in the circuit, low or dirty transmission fluid, or internal transmission issues.

4. Can low transmission fluid level cause code P0873?

Yes, low or contaminated transmission fluid can affect pressure readings and trigger the P0873 code.

5. How do you diagnose code P0873 in a 2014 Chevrolet Silverado?

Diagnosis typically involves scanning for additional codes, inspecting the wiring and connectors in the circuit, testing the transmission fluid pressure switch, and checking the transmission fluid condition.

6. How can a faulty pressure switch cause code P0873?

If the transmission fluid pressure switch fails, it may send incorrect voltage signals to the powertrain control module (PCM), leading to the P0873 code.

7. Can driving with code P0873 damage my 2014 Chevrolet Silverado?

Driving with this code may cause further damage to the transmission if the underlying issue isnâ€™t resolved, especially if the vehicle is stuck in limp mode or experiencing erratic shifting.

8. How much does it cost to fix code P0873 on a 2014 Chevrolet Silverado?

Repair costs vary depending on the exact issue but may range from $150 to $400 for pressure switch replacement or circuit repairs, excluding more extensive transmission damage.

9. Can I fix code P0873 myself on a 2014 Chevrolet Silverado?

If you have experience with automotive electrical diagnostics, you can inspect and repair wiring or replace the pressure switch. Otherwise, professional assistance is recommended.

10. Is it safe to clear code P0873 without making repairs?

Clearing the code without repairs may temporarily turn off the check engine light, but the issue will likely return and could lead to further transmission problems.