p0740 Torque Converter Clutch Circuit Malfunction

P0740 Torque converter clutch circuit malfunction is the technical definition of this trouble code

What the P0740 code means

What the P0740 code means is that the powertrain control module (PCM) has detected something unusual within the torque converter clutch circuit. The powertrain control module can vary the application of the torque converter clutch for optimal vehicle performance. If the torque converter clutch application is abnormal (usually multiple times) the powertrain control module will trigger a Check Engine Light.

Symptoms

Symptoms of a P0740 trouble code may include:

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

Common Causes of P0740

• Low, dirty or contaminated transmission fluid If the transmission fluid is very dirty, it is recommend changing the transmission fluid and if possible removing the transmission pan for further diagnosis.
• Excessive debris or metal particles on the transmission pan could be an indication that there is a transmission mechanical failure and that the transmission will need to be rebuilt or replaced.
• Defective pressure control solenoid
• Line pressure solenoid valve harness is open or shorted
• Line pressure solenoid valve circuit poor electrical connection
• Fluid blockages inside the transmission fluid passages
• Mechanical internal transmission failures
• Defective PCM or TCM but this is rare

Searches related to p0740 torque converter clutch circuit malfunction
torque converter clutch (tcc) solenoid

• p0740 dodge
• code p0740 honda accord
• p0740 honda odyssey
• p0740 jeep
• p0740 dodge grand caravan
• p0740 acura tl
• torque converter clutch circuit stuck on

Common Problems That Trigger the P0740 Code

• Defective Torque Converter Lockup Solenoid
• Defective Engine Coolant Temperature Sensor
• Defective Torque Converter Clutch
• Defective Valve Body
• Dirty transmission fluid that restricts the hydraulic passages

Common Misdiagnoses

• Engine Misfire problem
• Internal Transmission problem
• Driveline problem

Polluting Gases Expelled

• HCs (Hydrocarbons): Unburned droplets of raw fuel that smell, affect breathing, and contribute to smog

• CO (Carbon Monoxide): Partially burned fuel that is an odorless and deadly poisonous gas

• NOX (Oxides of Nitrogen): One of the two ingredients that, when exposed to sunlight, cause smog

Additional comments regarding the P0740 code

In order to help prevent trouble codes such as the P0740 code, it is a good idea to replace the transmission fluid in your vehicle along with the filter (if applicable) at the recommended intervals. Doing this will ensure that the internal parts of the transmission stay well lubricated and also prevents debris from causing a restriction within the transmission.