What Does the Engine Code P2809 Mean?

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A P2809 code indicates that the Pressure Control Solenoid G is not functioning properly. This is the electronic valve that helps to properly distribute the fluid in your transmission. When Solenoid G is not operating correctly, it affects the way your automatic transmission shifts gears.
An OBD-II code reader will give you one or more engine codes that can help you diagnose a problem. While knowing the code is important, many times you’ll also want to consult an expert, particularly when troubleshooting transmission issues.
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What does the engine code P2809 mean?

Definition: Pressure Control Solenoid 'G' Stuck On
A P2809 code means that your car’s computer has found a problem with one of the solenoids in your transmission, specifically Pressure Control Solenoid G. This solenoid is in charge of helping your vehicle to shift gears properly. The error may indicate that the solenoid has gone bad, but other related problems might cause a P2809 code.

How much will it cost to fix?

Diagnosing exactly what is causing a P2809 engine code will likely take about an hour (repair shops charge $75-150/hour). Then, the mechanic will need to fix the problem.
Assuming your Pressure Control Solenoid G is bad, it may cost between $400-500 to replace it (this includes parts and labor). However, if there is a wiring issue, this may take longer to resolve and thus cost more.

What can cause the P2809 engine code?

These are the most common causes of the P2809 code:
  • The Pressure Control Solenoid G is bad
  • There is a problem with the wiring connected to the solenoid
  • The transmission fluid is too low (and if there is a leak, the problem needs to be addressed)
  • There is a problem with your Transmission Control Module (TCM)

Common symptoms of the P2809 engine code

Drivers may notice one or more of the following issues:
  • Problems shifting gears
  • Decreased fuel efficiency

How serious is the P2809 code?

A P2809 code needs to be diagnosed and addressed as soon as possible. Transmission problems interfere with the way your car’s engine shifts gears. Do not ignore a P2809 code—if you do, you may severely damage your transmission

Can I fix the P2809 engine code myself?

Check your transmission fluid

If the P2809 code is being caused by low transmission fluid, you might be able to clear the code by adding fluid. Consult your vehicle’s manual for how to do this. However, if you continue to find the transmission fluid is low, this indicates a leak, which needs to be addressed.

Bad solenoid or wiring

Testing Pressure Control Solenoid G to see whether it is faulty means taking apart the transmission and locating the correct solenoid. Because transmissions have several solenoids, this requires time and patience to locate Solenoid G.
In the end, many people decide to have a professional diagnose the precise issue and fix the problem. Your mechanic may wind up replacing the solenoid, or they may discover that the solenoid is working, but that the wiring harness or connectors are bad. 
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