P2762 – Torque converter clutch {TCC) pressure control solenoid – range/performance problem

By Randy Worner (Contact Me)
Last Updated 2016-07-24
ASE/ACA World Class Technician

Table of Contents

1. What Does Code P2762 Mean?
2. What are the common causes of code P2762?
3. What are the symptoms of code P2762?
4. How do you troubleshoot code P2762?
5. Codes Related to P2762
6. Get Help with P2762

What Does Code P2762 Mean?

The transmission computer (TCM) controls the Torque Converter Clutch (TCC) system. The TCM may be part of the engine computer (PCM) or it may be a standalone unit. The TCM looks at the accelerator pedal position sensor (APPS) on the driver’s pedal and vehicle speed to determine when and how much pressure should be applied to the torque converter clutch. The TCM accomplishes this by a changing current flow to the TCC pressure control solenoid. This increases oil pressure to the torque converter clutch apply circuit, applying the torque converter clutch.

Code P2762 will set when the current flow applied by the TCM to the TCC pressure control solenoid does not match what is being measured by the TCM.

What are the common causes of code P2762?

• Faulty TCC Pressure Control Solenoid (Very Common)
• Wiring to the TCC Pressure Control Solenoid – open or shorted
• Failed Throttle Position Sensors (TPS) – unlikely
• Failed TCM – unlikely

What are the symptoms of code P2762?

• Malfunction Indicator Light “ON”
• Transmission won’t shift – usually stuck in 2^nd or 3^rd gear
• Torque Converter clutch won’t come on – engine rpms higher than normal at freeway speed

How do you troubleshoot code P2762?

First, take a look and see if there are any technical service bulletins (TSB) for your particular vehicle. There may be an update, or known fix put out by the manufacturer that can save you from wasting time and money.

Next, see if there are any other diagnostic fault codes. Diagnose current faults first, in the order in which they are stored. Misdiagnosis occurs when this code is diagnosed when it is a stored code, especially while other codes are active.

Next, locate the Torque Converter Clutch (TCC) system on your particular vehicle. Usually, it is located on the side of the transmission or under the hood. Clear the diagnostic trouble codes from memory, and see if the P2762 code returns. If it does not, then the code was either intermittent or a history code; it was something that occurred in the past.

If the code does return, check connections at both the TCM and the pressure control solenoid. Disconnect the negative battery cable before unplugging the connectors at the TCM. Once located, visually inspect the connectors and wiring. Look for scraping, burn spots or melted plastic. Pull the connectors apart and carefully inspect the terminals (the metal parts) inside the connectors. See if they look burned or have a green tint indicating corrosion. Get some electrical contact cleaner and a plastic bristle brush to clean the terminals as needed. Afterwards let them air dry, get some dielectric silicone grease and put some where the terminals come into contact. Clear the diagnostic trouble codes from memory, and see if the P2762 code returns. If it does not, then connection issues were most likely your problem.

If the P2762 code returns, you may want to check the resistance of the TCC pressure control solenoid. With the ignition switch in the off position, disconnect the electrical connector at the pressure control solenoid. Locate the 2 pins that go to the pressure control solenoid. Using a digital volt ohmmeter (DVOM) set to ohms, find the resistance of each solenoid. Each solenoid should be approximately between 2 and 25 ohms (check manufacturers specs for your vehicle). If the resistance is either too high or too low, the TCC system (pressure control solenoid) will need to be replaced.

If all tests have passed so far, you may want to check the voltage signals to each TCC solenoid, and/or resistance of the wiring between the TCC solenoids and the TCM. If any of these tests fail, it would indicate wiring repairs are needed between the TCM and the TCC pressure control solenoid.

If all tests have passed to this point, and you continue to get a P2762 code, this would most likely indicate a failed Pressure control solenoid, although a failed TCM could not be ruled out until the pressure control solenoid had been replaced. At this point it is probably wise to consult with a trained automotive diagnostician.

Codes Related to P2762

P2763 – TCC pressure control solenoid control circuit high voltage

P2764 – TCC pressure control solenoid control circuit low voltage

P2762 is typically related to amperage output not matching what’s being seen at the solenoid. These 2 codes focus on voltage measurements, monitoring for changes in voltage, which would indicate changes in circuit resistance. All three codes will typically be electrical issues.

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