Fix P2716: Mechanic’s solutions that WORKED

The P2716: Pressure Control Solenoid ‘D’ Electrical indicates an issue with the electrical circuit of the ‘D’ pressure control solenoid in the transmission. This solenoid plays a crucial role in controlling the hydraulic pressure in the transmission, which is essential for smooth gear shifting. When the electrical aspect of this solenoid malfunctions, it can lead to transmission shifting problems.

P2716 quick overview

Meaning	P2716: Pressure Control Solenoid ‘D’ Electrical
Is it serious?	This code can be serious as it may affect the transmission’s shifting behavior, potentially leading to more significant transmission issues if not addressed.
Possible causes	– Faulty pressure control solenoid – Issues with the Powertrain Control Module (PCM) or Transmission Control Module (TCM) – Wiring or electrical problems in the transmission circuit – Internal transmission issues – Inadequate or incorrect transmission fluid
How to diagnose?	Inspect the Solenoid: Check the pressure control solenoid ‘D’ for proper resistance and operation. Check PCM/TCM: Verify if the PCM or TCM requires reprogramming or replacement. Examine Electrical Connections: Look for any wiring issues, including shorts or open circuits. Confirm Fluid Quality: Ensure the correct transmission fluid is used and at the proper level. Review Ground Connections: Check and clean all relevant ground connections, especially at the back of the intake manifold. Consider Internal Transmission Check: If other diagnostics are inconclusive, evaluate for possible internal transmission problems.

How to fix P2716 – learn from mechanics

I looked into P2716 service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.

Case #1: Volkswagen

Vehicle Information: 2002 Volkswagen Passat GLS 1.8L

Issue + Repair History:

• Car likely in “Limp” mode, starting out in 2nd or 3rd gear and only shifting once.
• Shift select indicator not showing the current gear.
• Manual shift mode inoperative.
• Initial diagnosis showed codes PO762 (Solenoid valve 3 short to positive) and P2716.

Other OBD2 Codes + Test Results:

• P2716
• P0762

Suggestions to Fix Issue:

• Clear codes and see if they return quickly.
• Inspect solenoids on the transmission for failure.
• Check wiring diagrams for common areas of fault like shared power/ground.
• Inspect all sensors on the transmission and wiring harnesses.
• If solenoids or wiring loom to actuators are damaged, repair or replace them.
• Consider water damage to the transmission computer, especially if the car has a sunroof.

Final Fix:

• Found water in the transmission ECU box due to leaky sunroof drains and cabin filter housing seal.
• Dried out the ECU and plug, cleaned sunroof drains, and resealed cabin filter housing, resolving the issue.

Case #2: Toyota

Vehicle Information: 2005 Toyota Corolla LE 1.8L

Issue + Repair History:

• Hard gear changes when hot; smooth operation when cold.
• Error code P2716 with no related codes.
• Valve body removed and inspected – found clean.
• Bench tested solenoid “D”; passed ohms and 12-volt test.
• Wiring also checked and found to be good.

Other OBD2 Codes + Test Results:

• P2716 – Clutch Pressure Control Valve C Stuck Off

Suggestions to Fix Issue:

• Check for warranty coverage due to known PCM issues.
• Look up TSB for replacement of PCM related to harsh shift and code P2716.
• Ensure correct PCM is used and VIN is programmed.
• Check ground wires for proper connection and cleanliness.
• Test voltage and amperage at PCM/TCM to solenoid.
• Inspect solenoids and wiring harness.

Final Fix:

• The issue was resolved by replacing the PCM. The vehicle was sent to a dealer for this service, as a Techstream Lite was required for reprogramming the new ECM/PCM.

Case #3: Lexus

Vehicle Information: 2007 Lexus ES350 3.5L

Issue + Repair History:

• Code set for transmission solenoid with no apparent symptoms.
• TSB suggested checking resistance and potentially replacing TCM with updated part # 89530-33041.
• Dealer experience mostly involved replacing the entire transmission instead of just the TCM.

Other OBD2 Codes + Test Results:

• P2716 – Pressure Control Solenoid D

Suggestions to Fix Issue:

• Follow the TSB to test the resistance of the TCM.
• If resistance is correct, consider replacing the TCM with the updated part.
• Consult with the dealer about the necessity of reprogramming the TCM after replacement.

Final Fix:

• The TCM was replaced and programmed as per the TSB, resolving the issue without needing a full transmission replacement.

Case #4: Pontiac

Vehicle Information: 2005 Pontiac Vibe 1.8L

Issue + Repair History:

• MIL lamp on and hard shifting experienced.
• The pressure control solenoid tested within spec (5.1 – 5.5 ohms).
• The issue occurred intermittently during drives of varying distances.
• Diagnostic sheet suggested replacing the computer, but technician sought further input.

Other OBD2 Codes + Test Results:

• P2716 – Transmission line pressure solenoid open/shorted

Suggestions to Fix Issue:

• Check resistances at PCM connector when disconnected and measure the amperage draw when activated.
• Consider replacing the PCM, as it is a known fix for the code P2716.
• Review TSBs for the 2005 Corolla/Matrix as they apply to the Vibe with Toyota transmission.
• Consider reflashing the PCM to resolve potential software glitches.

Final Fix:

• The PCM was replaced and updated by a GM dealer, resolving the issue and satisfying the customer.

Case #5: Toyota

Vehicle Information: 2007 Toyota Camry XLE 3.5L

Issue + Repair History:

• Check engine light on but no noticeable driving problems.
• Scanned and found code P2716 (pressure control solenoid ‘D’ electrical).
• Customer initially opted for solenoid replacement over recommended ECU reflash.
• After about 1500 miles, customer experienced a single instance of delayed gear engagement in drive or reverse.

Other OBD2 Codes + Test Results:

• P2716 – Pressure control solenoid ‘D’ electrical

Suggestions to Fix Issue:

• A reflash of the TCM could potentially fix shifting issues, as it adjusts shift times and adapts to transmission wear.
• Verify the current calibration ID in the transmission with the one in the TSB.
• Service the transmission with the correct fluid and ensure proper level adjustment.
• Consider a remanufactured transmission unit from Toyota, specifically for the V6, known for having issues.

Final Fix:

• Cleared the codes and test drove the vehicle; the problem did not reoccur.
• The customer drove the car for nearly a month without the problem returning.
• No specific fix was identified, but the issue did not persist.

Advice	Description of Diagnostic Step
Check the PCM/TCM	Verify if the Powertrain Control Module (PCM) or Transmission Control Module (TCM) requires replacement or reprogramming.
Inspect Ground Connections	Check and clean ground connections, particularly those on the back of the intake manifold.
Perform Electrical Testing	Conduct electrical testing at the PCM/TCM to solenoid, including voltage and amperage checks.
Replace Transmission Solenoid	If diagnostics indicate, replace the problematic solenoid, typically solenoid ‘D’.
Ensure Correct Fluid Use	Verify the use of the correct transmission fluid type and ensure proper fluid level.
Verify Wiring Integrity	Check the wiring harness for shorts, opens, or damages leading to the solenoid.
Consider Internal Transmission Issues	Be aware that internal transmission problems can manifest similar symptoms, requiring more extensive repair or replacement.