AutoCodes – Pontiac – P0872 Pontiac

P0872 Pontiac Code - Transmission Fluid Pressure Sensor/Switch 'C' Circuit Low

Quick Answer

The 4th clutch pressure switch is located in the hydraulic passage to the 4th clutch. Common causes include Faulty Transmission Fluid Pressure Sensor/Switch 'C', Transmission Fluid Pressure Sensor/Switch 'C' harness is open or shorted, Transmission Fluid Pressure Sensor/Switch 'C' 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: P0872 Pontiac indicates Transmission Fluid Pressure Sensor/Switch 'C' Circuit Low.
Common causes: Common causes include Faulty Transmission Fluid Pressure Sensor/Switch 'C', Transmission Fluid Pressure Sensor/Switch 'C' harness is open or shorted, Transmission Fluid Pressure Sensor/Switch 'C' 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 724

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 Dec 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0872 Pontiac Description

The 4th clutch pressure switch is located in the hydraulic passage to the 4th clutch. When oil pressure is supplied to the 4th clutch, the switch is grounded, LOW. When oil pressure is not supplied, the switch is open, HI. The PCM receives the signal from the 4th clutch pressure switch to detect the fluid pressure status, in order to reduce the shift shock when shifting into 4th gear, from 3rd to 4th or 5th to 4th. If the 4th clutch pressure switch is ON when the gear ratio is not 4th gear, the PCM determines it is a fault and Diagnostic Trouble Code (DTC) P0872 sets. DTC P0872 is a type C DTC. The Diagnostic Trouble Code (DTC) will set if the 4th clutch pressure switch is OFF when the transmission is in 5th gear for 2 seconds or greater.

OBDII Code P0872 Pontiac - Transmission Fluid Pressure Sensor/Switch 'C' Circuit Low - AutoCodes.com — P0872 Pontiac Code - Transmission Fluid Pressure Sensor/Switch 'C' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0872 Pontiac?

Faulty Transmission Fluid Pressure Sensor/Switch 'C'
Transmission Fluid Pressure Sensor/Switch 'C' harness is open or shorted
Transmission Fluid Pressure Sensor/Switch 'C' circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0872 Pontiac?

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 P0872 Pontiac 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.

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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 P0872 Pontiac Code

1. What are the common symptoms of OBDII code P0872 in a Pontiac related to the Transmission Fluid Pressure Sensor/Switch 'C' Circuit Low?

- Common symptoms include harsh shifting, transmission slipping, decreased fuel efficiency, and the transmission going into limp mode.

2. What are the possible causes of OBDII code P0872 in a Pontiac?

- The code P0872 in a Pontiac can be caused by a faulty transmission fluid pressure sensor/switch, low transmission fluid levels, a clogged transmission filter, or damaged wiring/connectors.

3. How can I diagnose the Transmission Fluid Pressure Sensor/Switch 'C' Circuit Low issue in my Pontiac?

- To diagnose the issue, use an OBDII scanner to read the code, inspect the transmission fluid level and condition, check the wiring and connectors for any damage, and test the transmission fluid pressure sensor/switch for proper function.

4. Can I continue driving my Pontiac with OBDII code P0872 present?

- It is not recommended to continue driving your Pontiac with OBDII code P0872 present, as it can lead to further damage to the transmission and drivability issues.

5. How can I repair OBDII code P0872 related to the Transmission Fluid Pressure Sensor/Switch 'C' Circuit Low in my Pontiac?

- Repair options include replacing the faulty transmission fluid pressure sensor/switch, addressing low transmission fluid levels, changing the transmission fluid and filter, and repairing any damaged wiring or connectors.

6. What is the typical cost of repairing OBDII code P0872 in a Pontiac?

- The cost of repairing OBDII code P0872 in a Pontiac can vary depending on the exact cause of the issue, but it generally ranges from $200 to $500 for parts and labor.

7. Can a DIY enthusiast fix OBDII code P0872 in a Pontiac?

- While some DIY enthusiasts may be able to address simpler causes of OBDII code P0872, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair to avoid further damage.

8. How long does it take to repair OBDII code P0872 in a Pontiac?

- The repair time for OBDII code P0872 in a Pontiac can vary depending on the cause of the issue and the repair required, but it typically takes a few hours to a full day to complete.

9. Will resetting the OBDII code P0872 in my Pontiac make it go away permanently?

- Resetting the OBDII code P0872 may temporarily turn off the check engine light, but the issue causing the code will persist unless properly diagnosed and repaired.

10. Are there any preventive maintenance tips to avoid OBDII code P0872 in my Pontiac?

- Regularly checking and maintaining proper transmission fluid levels, replacing the transmission fluid and filter as recommended, and addressing any transmission issues promptly can help prevent OBDII code P0872 in your Pontiac.