2003 Chevy Impala ENGINE CODES 741 AND 742 TCI stuck off

Tiny
TRUCKING MAN 55`
  • MEMBER
  • 2003 CHEVROLET IMPALA
Transmission problem
2003 Chevy Impala 6 cyl Front Wheel Drive Automatic

can I repair this condition at home and how?
Do you
have the same problem?
Yes
No
Tuesday, April 14th, 2009 AT 5:30 PM

1 Reply

Tiny
BMRFIXIT
  • EXPERT
Need to have it checked by a tranny shop as you may need to have the tranny apart for the repair
Diagnostic Procedure
Did you perform the diagnostic system check? If so, go to next step..
Did you perform the transmission fluid checking procedure? If so, go to next step. If not, perform the transmission fluid checking procedure. See appropriate AUTOMATIC article in TRANSMISSION SERVICING.
Install a scan tool. Turn ignition on, engine off. Before clearing the DTCs, use the scan tool to record the freeze frame and failure records for reference. Using the CLEAR INFO function will erase the stored freeze frame and failure records from the PCM. Record the freeze frame and failure records. Clear the DTCs. Start the engine. With the scan tool, observe TCC release pressure. Does the scan tool indicate YES for TCC release pressure? If so, go to step 5. If not, go to next step.
Inspect the following components:
The TCC control valve.
The TCC regulator apply valve.
The TCC PWM solenoid valve.
The pressure regulator valve.
Repair or replace any malfunctioning components. See appropriate OVERHAUL article. Did you complete the repair? If so, go to step 7.
Drive the vehicle above 45 MPH with a throttle angle of 5-35 percent. With the scan tool, command the TCC PWM solenoid valve on and monitor the TCC slip speed display. Does the scan tool indicate the slip speed is within -50 RPM to 50 RPM? If so, see DIAGNOSTIC AIDS. If not, go to next step.
Inspect the following components:
The cooling system for plugging.
The cooling lines may be pinched.
The TCC control valve for sticking.
The TCC regulator valve for sticking.
The TCC PWM solenoid valve and "O" ring seal for leaks.
The TCC PWM solenoid valve filter for plugging.
The TCC blowoff valve for damage or not seating.
The turbine shaft seals for leaks.
The torque converter clutch.
Repair or replace the component as necessary. Did you complete the repair? If so, go to next step.
Perform the following procedure to verify the repair:
Select DTC.
Select CLEAR INFO.
Drive the vehicle in D3 or D4 until the TCC is engaged.
Throttle angle must be 4-35 percent.
Time since the last range change must be greater than 6 seconds.
The TCC is commanded on at greater than 50 percent duty cycle.
TCC slip speed must be less than 50 RPM for at least 4 seconds.
Select SPECIFIC DTC.
Enter DTC P0741.
Has the test run and passed? If so, system is okay. If not, go to step 1.
Was this
answer
helpful?
Yes
No
Tuesday, April 14th, 2009 AT 8:34 PM

Please login or register to post a reply.

Recommended Guides