AutoCodes – Generic – P1810

P1810 Code - Transmission Fluid Pressure Valve Position Switch Circuit

Quick Answer

The automatic Transmission Fluid Pressure (TFP) manual valve position switch consists of five pressure switches (two normally-closed and three normally-open) and a Transmission Fluid Temperature (TFT) sensor combined into one unit. Common causes include Faulty Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch, TFP Valve Position Switch harness is open or shorted, TFP Valve Position Switch 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: P1810 indicates Transmission Fluid Pressure Valve Position Switch Circuit.
Common causes: Common causes include Faulty Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch, TFP Valve Position Switch harness is open or shorted, TFP Valve Position Switch 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 40,798

How popular is this code, among other codes? Medium

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 Sep 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1810 Description

The automatic Transmission Fluid Pressure (TFP) manual valve position switch consists of five pressure switches (two normally-closed and three normally-open) and a Transmission Fluid Temperature (TFT) sensor combined into one unit. The combined unit mounts on the valve body.
The Powertrain Control Module (PCM) supplies ignition voltage for each range signal. By grounding one or more of the circuits through various combinations of the pressure switches, the PCM detects which manual valve position you select. The PCM compares the actual voltage combination of the switches to a TFP manual valve position switch combination table stored in memory.
The TFP manual valve position switch cannot distinguish between PARK and NEUTRAL because the monitored valve body pressures are identical. With the engine OFF and the ignition switch in the RUN position, the TFP manual valve position switch indicates PARK or NEUTRAL. Disconnecting the AT inline 20-way connector removes the ground potential for the three range signals to the PCM. In this case, with the engine OFF, and the ignition switch in the RUN position, D2 will be indicated.

OBDII Code P1810 - Transmission Fluid Pressure Valve Position Switch Circuit - AutoCodes.com — P1810 Code - Transmission Fluid Pressure Valve Position Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P1810?

Faulty Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch
TFP Valve Position Switch harness is open or shorted
TFP Valve Position Switch circuit poor electrical connection

How to Fix the DTC P1810?

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 P1810 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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Information for Specific Makes

P1810 Buick — Transmission Fluid Pressure Valve Position Switch Circuit
P1810 Cadillac — Transmission Fluid Pressure Valve Position Switch Circuit
P1810 Chevrolet — Transmission Fluid Pressure Valve Position Switch Circuit
P1810 Ford — Transmission Fluid Pressure Valve Position Switch Circuit
P1810 GMC — Transmission Fluid Pressure Valve Position Switch Circuit
P1810 Infiniti — 4 LO Switch
P1810 Lexus — CAN Data Bus Malfunction
P1810 Nissan — 4 LO Switch
P1810 Pontiac — Transmission Fluid Pressure Valve Position Switch Circuit
P1810 Saturn — Transmission Fluid Pressure Valve Position Switch Circuit
P1810 Toyota — CAN Data Bus Malfunction

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 P1810 Code

1. What are the common symptoms of OBDII code P1810 related to the Transmission Fluid Pressure Valve Position Switch Circuit?

- Common symptoms include harsh shifting, transmission slippage, difficulty shifting gears, and in some cases, the transmission may go into limp mode.

2. What are the possible causes of OBDII code P1810?

- Possible causes include a faulty transmission fluid pressure switch, wiring issues, a defective transmission control module (TCM), low transmission fluid levels, or a failed pressure control solenoid.

3. How can I diagnose the cause of OBDII code P1810?

- Diagnosing this code typically involves checking the transmission fluid level and condition, inspecting the wiring and connectors related to the pressure switch, and using a scan tool to monitor the switch's operation.

4. Can I still drive my vehicle with OBDII code P1810?

- It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the transmission. It is best to address the issue promptly.

5. What are the repair options for OBDII code P1810?

- Repair options may include replacing the faulty pressure switch, repairing any damaged wiring, checking and topping up transmission fluid levels, or replacing the transmission control module if necessary.

6. How much does it typically cost to repair OBDII code P1810?

- The cost of repairs can vary depending on the underlying cause of the code and the specific components that need to be replaced. Costs can range from a couple of hundred dollars for a simple fix to over a thousand dollars for more complex issues.

7. Can I reset OBDII code P1810 without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, the issue will likely reoccur if the root cause is not addressed. It is recommended to fix the problem to prevent further transmission damage.

8. How urgent is it to address OBDII code P1810?

- It is important to address this code promptly to prevent potential damage to the transmission and ensure the safe operation of your vehicle. Ignoring the issue can lead to more costly repairs down the line.

9. Are there any preventive measures to avoid OBDII code P1810 in the future?

- Regularly checking and maintaining proper transmission fluid levels, addressing any leaks promptly, and ensuring the transmission is serviced at recommended intervals can help prevent issues that may trigger this code.

10. Can a DIY enthusiast fix OBDII code P1810 at home?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address simpler causes of this code, such as replacing the pressure switch or checking and topping up transmission fluid. However, more complex issues may require professional diagnosis and repair.