What Does Engine Code P2815 Mean?

If your car is showing the P2815 engine code, the pressure control solenoid "G" control circuit is malfunctioning.
Written by Andrea Barrett
Reviewed by Melanie Reiff
If your car is showing the P2815 engine code, the powertrain control module (PCM) has detected a problem with the transmission pressure control solenoid "G" control circuit. This code generally indicates a moderate concern for the driver but can progress rapidly and cause permanent internal damage if not corrected in a timely manner.
Diagnostic trouble codes (DTCs) are your vehicle’s way of communicating, and they function to help you identify issues with your car’s engine.
Understanding car OBD codes
allows you to pinpoint the source of car trouble, evaluate the problem, and find the appropriate solution. 
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What does the engine code P2815 mean?

Definition: Pressure control solenoid "G" control circuit malfunction
The P2815 engine code indicates a problem with your car’s pressure control solenoid "G" control circuit, a component of automatic cars that adjusts the pressure of fluid for automatic transmissions to ensure the vehicle operates properly and shifts smoothly

How much will it cost to fix?

Diagnostic tests for the P2815 code generally take one hour of labor at, on average, $75 to $150 per hour. However, rates may vary based on your location, vehicle’s
make and model
, and engine type. 

What can cause the P2815 engine code?

If your car is showing the P2815 engine code, it is likely that there is a problem with your car’s pressure control system. The most common cause of the P2815 engine code is a faulty pressure control solenoid ‘G’.
In order for a vehicle with an automatic transmission to switch gears, the transmission pressure control solenoid valves need to adjust the amount of fluid pressure being applied to each system component.
The powertrain control module (PCM) is responsible for monitoring the solenoid pressure levels and distributing fluid accordingly. However, ​​when the PCM detects that the ‘G’ pressure control solenoid control circuit is high and therefore malfunctioning, it will set off the P2815 engine code. 
Other potential issues that could cause this engine code include: 
  • Pressure control solenoid 'G' harness is open or shorted
  • Poor electrical connection of the pressure control solenoid 'G' circuit
  • Blockage in the transmission valve body
Key Takeaway There are several reasons why the P2815 engine code may appear, but the most common is a faulty pressure control solenoid ‘G’.

Common symptoms of the P2815 engine code

The P2815 engine code may not present any symptoms other than
illumination of the Check Engine Light
or the Service Engine Soon Light. Other possible signs to look for include:
  • Increased gas consumption
  • Overheating transmission
  • Transmission slippage during gear shift
  • Apparent symptoms of
    engine misfiring
  • Transmission gliding

How serious is the P2815 engine code? 

The P2815 engine code usually indicates a moderate problem, though it can progress to a severe problem rapidly if left unchecked. If the ​​transmission collides with the gear, it can result in permanent internal damage to the car and can further exacerbate the issue and increase the seriousness of the problem. In any case, get your vehicle inspected as soon as possible.

Can I fix the P2815 engine code myself?

Although difficult, it may be possible to repair the P2815 engine code at home, assuming it is diagnosed correctly. 
The first step is to check the fluid levels and look for contamination of the fluid. Next, inspect the wiring harness and connectors to determine if there are obvious defects to any of the parts. Look for anything that is broken, bent, or pushed out. 
Check the connectors and connections for safety, corrosion, and damage to the pins. This includes all wiring and connectors to the transmission pressure control solenoids, transmission pump, and PCM.
Depending on the severity and/or source of the issue, you may need to replace or repair certain parts:
  • Engine control module
  • Transmission fluid pump
  • Transmission fluid pump harness
  • Powertrain control module
  • Automatic transmission module
  • Electronic control unit
The advanced steps for fixing the P2815 engine code are vehicle-specific and require the use of appropriate equipment. If performing at home, follow the troubleshooting chart for your vehicle’s make and model.
If you are unsure of the repairs needed to fix the P2815 engine code, bring your car to a professional mechanic for a diagnostic inspection and repairs. 

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