Fix P2815: STEP-BY-STEP diagnostic GUIDE!

The P2815: Pressure Control Solenoid ‘G’ Control Circuit High code indicates that there is a high voltage issue within the control circuit of pressure control solenoid ‘G’. This can be caused by faulty wiring, a defective solenoid, or problems within the control module that regulates the voltage. High voltage in the control circuit may lead to improper operation of the solenoid, resulting in transmission issues such as erratic shifting.

P2815 – Quick Overview

Code	Information
Meaning	P2815: Pressure Control Solenoid ‘G’ Control Circuit High
Is it serious?	Yes, high voltage in the solenoid’s control circuit can lead to improper regulation of hydraulic pressure, causing erratic shifting and transmission damage.
Possible causes	– High voltage in pressure control solenoid ‘G’ control circuit – Faulty wiring or solenoid – Control module issues
How to diagnose?	– Measure voltage in pressure control solenoid ‘G’ control circuit – Inspect wiring and connectors for damage – Check for shorts or other faults – Replace components as needed

P2815 Meaning

The P2815: Pressure Control Solenoid ‘G’ Control Circuit High code signifies that the voltage level in the circuit controlling pressure control solenoid ‘G’ is higher than the manufacturer-specified range. This elevated voltage can be due to a short circuit, a faulty solenoid, improper grounding, or a malfunction in the transmission control module (TCM). High voltage can impair the solenoid’s ability to properly regulate hydraulic pressure, resulting in harsh gear shifts, transmission slipping, or even damage over time.

Step-by-step diagnostic guide

Action	Description	Tools Needed
Check for Other Codes	Use an OBD-II scanner to check if there are any additional transmission-related fault codes present. These could help provide a fuller picture of the problem.	OBD-II Scanner
Measure Voltage in Solenoid ‘G’ Circuit	Use a multimeter to measure the voltage in the pressure control solenoid ‘G’ control circuit. Compare it to the manufacturer’s specified range to verify if the voltage is too high.	Multimeter, Service Manual
Inspect Wiring and Connectors	Visually inspect the wiring and connectors for damage, such as frayed wires, loose connections, or corrosion. Any damaged parts should be repaired or replaced as they could lead to increased resistance or short circuits.	Flashlight, Safety Gloves
Check for Shorts or Other Faults	Inspect the circuit for any shorts to the power supply. Use a multimeter to identify any sections of the wiring that are shorting and causing high voltage to reach the solenoid.	Multimeter
Test the Solenoid	Test the resistance of the pressure control solenoid ‘G’ using a multimeter. If the solenoid shows unusually low resistance or a short, it may be faulty and require replacement.	Multimeter
Verify Control Module Functionality	Use a diagnostic tool to ensure that the control module is functioning properly and sending appropriate voltage levels. A failing control module could command excessive voltage to the solenoid circuit.	OBD-II Scanner, Diagnostic Software
Replace Faulty Components	Replace any faulty wiring, connectors, or the pressure control solenoid if necessary. Ensure to use OEM or quality replacement parts to maintain system reliability.	Replacement Solenoid, Wiring Tools
Clear the Code and Test Drive	Clear the P2815 code using an OBD-II scanner and take the vehicle for a test drive. Monitor the transmission behavior for proper shifting and ensure no high voltage issues persist.	OBD-II Scanner, Vehicle Owner’s Manual
Recheck for Codes	After the test drive, use the OBD-II scanner to re-scan the vehicle to ensure that the P2815 code has not returned. If the code persists, further diagnostics may be needed to examine the TCM or to check for more hidden wiring issues.	OBD-II Scanner