Technical Definition:

Shift (Solenoid A)

Technical Description:

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OBD-II Trouble Code Type:

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Technical Definition:

Pressure Control (Solenoid A) Electrical

Technical Description:

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Technical Definition:

Pressure Control (Solenoid A) Intermittent

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Technical Definition:

Torque Converter Clutch Circuit Intermittent

Technical Description:

Modern vehicles equipped with automatic transmissions / transaxles use a torque converter between the engine and transmission to increase the engine torque output and drive the rear wheels.

Possible Causes:

Possible Symptoms:

• Intermittent Indicator Lamp (MIL) illuminated (a.k.a. Check Engine Light)
• Minimal decrease in fuel economy, this will not affect engine performance

Torque Converter Clutch Circuit Intermittent

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty torque converter clutch solenoid valve
– Torque converter clutch solenoid valve harness is open or shorted
– Torque converter clutch solenoid valve circuit poor electrical connection
– Low transmission fluid level
– Dirty transmission fluid

Specific Makes:

Technical Definition:

Pressure Control (Solenoid A)

Technical Description:

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Pressure Control Solenoid Malfunction

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Low transmission fluid level
– Dirty transmission fluid
– Faulty line pressure solenoid valve
– Line pressure solenoid valve harness is open or shorted
– Line pressure solenoid valve circuit poor electrical connection

Specific Makes:

– Transmission shift shock

Technical Definition:

Pressure Control (Solenoid A) Performance / Stuck Off

Technical Description:

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Pressure Control Solenoid A Performance or Stuck Off

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Low transmission fluid level
– Dirty transmission fluid
– Faulty line pressure solenoid valve
– Line pressure solenoid valve harness is open or shorted
– Line pressure solenoid valve circuit poor electrical connection

Specific Makes:

– Transmission shift shock

Technical Definition:

Pressure Control (Solenoid A) Stuck On

Technical Description:

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Pressure Control Solenoid A Stuck On

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Low transmission fluid level
– Dirty transmission fluid
– Faulty Pressure Control Solenoid
– Pressure Control Solenoid harness is open or shorted
– Pressure Control Solenoid circuit poor electrical connection

Specific Makes:

– Transmission shift shock

Technical Definition:

Torque Converter Clutch Circuit Electrical

Technical Description:

The diagnostic trouble code is set when the Engine Management Computer (EMC) also known as the Powertrain Control Module (PCM) and also known as the Engine Control Module (ECM) detects a fault with the torque converter clutch (TCC) solenoid electrical circuit, which is contained inside the transmission.

Possible Causes:

• Low or dirty transmission fluid
• Wire/circuit issue shorted to power or ground
• Failed torque converter clutch (TCC) solenoid
• Failed TCC assembly in the torque converter
• Failed PCM/ECM/EMC

Possible Symptoms:

• Malfunction indicator illumination (check engine light or service engine soon light)
• Stalling when coming to a stop after cruising speeds
• Shudder on take off
• Shudder when coming to a stop

Torque Converter Clutch Circuit Electrical

Possible Solutions:

• On Board Diagnostic (OBD-II) scan tool – to pull the code; can be found at many parts stores, online, or many parts stores will pull the code for free
• Multimeter that has a resistance (or OHM) reading
• Self powered test light/probe (a Power Probe III works wonders here). If you don’t have a Power Probe, a simple set of fused jumper wires and a test light will suffice
• Wire diagrams will be very helpful – you can get these in a Haynes manual or if your friendly with the dealer or your local mechanic, they may be able to run off a photocopy

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty torque converter clutch solenoid valve
– Torque converter clutch solenoid valve harness is open or shorted
– Torque converter clutch solenoid valve circuit poor electrical connection
– Low transmission fluid level
– Dirty transmission fluid

Specific Makes:

Technical Definition:

Torque Converter Clutch Circuit Performance / Stuck Off

Technical Description:

Modern vehicles equipped with automatic transmissions / transaxles use a torque converter between the engine and transmission to increase the engine torque output and drive the rear wheels.

Possible Causes:

Possible Symptoms:

• Performance or Stuck Off Indicator Lamp (MIL) illuminated
• Minimal decrease in fuel economy, this will not affect engine performance

Torque Converter Clutch Circuit Performance or Stuck Off

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Low transmission fluid level
– Dirty transmission fluid
– Faulty torque converter clutch solenoid valve
– Torque converter clutch solenoid valve harness or connectors
– Torque converter clutch solenoid valve circuit is open or shorted
– Transmission internal mechanical problem

Specific Makes:

Technical Definition:

Torque Converter Clutch Circuit Stuck On

Technical Description:

Modern vehicles equipped with automatic transmissions / transaxles use a torque converter between the engine and transmission to increase the engine torque output and drive the rear wheels.

Possible Causes:

Possible Symptoms:

• Stuck On Indicator Lamp (MIL) illuminated
• If the torque converter clutch is actually stuck on, the engine may stall at idle. This is a common problem for certain model GM vehicles, while driving at highway speeds and then coming to a stop the engine dies from the torque converter clutch being stuck on. Usually the engine will restart and resume normal operation.

Torque Converter Clutch Circuit Stuck On

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Low transmission fluid level
– Dirty transmission fluid
– Faulty torque converter clutch solenoid valve
– Torque converter clutch solenoid valve harness or connectors
– Torque converter clutch solenoid valve circuit is open or shorted
– Transmission internal mechanical problem

Specific Makes:

Technical Definition:

Torque Converter Clutch Circuit / Open

Technical Description:

Possible Causes:

Possible Symptoms:

Torque Converter Clutch Malfunction

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Low transmission fluid level
– Dirty transmission fluid
– Faulty torque converter clutch solenoid valve
– Torque converter clutch solenoid valve harness is open or shorted
– Torque converter clutch solenoid valve circuit poor electrical connection

Specific Makes:

– Transmission shift shock
– Vehicle may not shift into the highest gear