AutoCodes – Generic – P0877

P0877 Code - Transmission Fluid Pressure Sensor/Switch 'D' Circuit Low

Quick Answer

The Engine Control Module (ECM) monitors the Transmission Fluid Pressure Sensor/Switch 'D'. Common causes include Faulty Transmission Fluid Pressure Sensor/Switch 'D', Transmission Fluid Pressure Sensor/Switch 'D' harness is open or shorted, Transmission Fluid Pressure Sensor/Switch 'D' circuit poor electrical connection. 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: P0877 indicates Transmission Fluid Pressure Sensor/Switch 'D' Circuit Low.
Common causes: Common causes include Faulty Transmission Fluid Pressure Sensor/Switch 'D', Transmission Fluid Pressure Sensor/Switch 'D' harness is open or shorted, Transmission Fluid Pressure Sensor/Switch 'D' circuit poor electrical connection.
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 26,266

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 04, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0877 Description

The Engine Control Module (ECM) monitors the Transmission Fluid Pressure Sensor/Switch 'D'. The ECM sets the OBDII when the Transmission Fluid Pressure Sensor/Switch 'D' is not to factory specifications.

OBDII Code P0877 - Transmission Fluid Pressure Sensor/Switch 'D' Circuit Low - AutoCodes.com — P0877 Code - Transmission Fluid Pressure Sensor/Switch 'D' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0877?

Faulty Transmission Fluid Pressure Sensor/Switch 'D'
Transmission Fluid Pressure Sensor/Switch 'D' harness is open or shorted
Transmission Fluid Pressure Sensor/Switch 'D' circuit poor electrical connection

How to Fix the DTC P0877?

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 P0877 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 P0877 code?

Need more information on how to fix the P0877 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0877 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0877 Buick — Transmission Fluid Pressure Switch 4 Circuit Low Voltage
P0877 Cadillac — Transmission Fluid Pressure Switch 4 Circuit Low Voltage
P0877 Chevrolet — Transmission Fluid Pressure Switch 4 Circuit Low Voltage
P0877 Dodge — Transmission Fluid Pressure Sensor/Switch 'D' Circuit Low
P0877 GMC — Transmission Fluid Pressure Switch 4 Circuit Low Voltage
P0877 Toyota — Transmission Fluid Pressure Sensor/Switch 'D' Circuit Low

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 P0877 Code

What does the OBDII code P0877 mean?

P0877 indicates that the Transmission Fluid Pressure Sensor/Switch 'D' circuit is reporting a low voltage signal, suggesting an issue with the sensor, its wiring, or the transmission fluid pressure.

What are the common symptoms of code P0877?

Symptoms may include harsh or delayed shifting, the transmission staying in limp mode, reduced fuel efficiency, and the Check Engine Light being illuminated.

What causes the P0877 code?

Common causes include a faulty transmission fluid pressure sensor/switch, damaged or corroded wiring or connectors, low transmission fluid levels, or internal transmission issues.

How can I diagnose the P0877 code?

Start by checking the transmission fluid level and condition, inspect the wiring and connectors for damage or corrosion, and test the sensor for proper operation using a multimeter.

Can driving with a P0877 code damage my vehicle?

Yes, driving with this code can lead to further transmission damage if the underlying issue is not addressed, especially if the transmission is in limp mode or shifting poorly.

How do I fix the P0877 code?

Repairs may include replacing the faulty transmission fluid pressure sensor, repairing damaged wiring or connectors, or addressing low or contaminated transmission fluid.

Can low transmission fluid cause the P0877 code?

Yes, low or contaminated transmission fluid can lead to insufficient pressure readings, triggering the P0877 code.

Is the P0877 code specific to certain vehicle makes?

No, the P0877 code is a generic OBDII code and can appear in many vehicles, but the exact cause and repair steps may vary by make and model.

How much does it cost to fix the P0877 code?

Repair costs depend on the specific cause; replacing a transmission fluid pressure sensor typically costs $150–$400, while wiring repairs may vary widely.

Can I clear the P0877 code without fixing the problem?

Clearing the code without fixing the issue may temporarily turn off the Check Engine Light, but the code will likely return if the underlying problem persists.