What do these codes mean PO325, PO740...with CHECK ENGINE LIGHT

SOURCE: engine lite on

po740 is possible bad torque converter or sometimes the o-ring around the torque convertor is not sealing around the torque this is what honda says about the code

SOURCE: What does error code PO740 for the check engine

P0740 is Torque Converter Lock-up Solinoid Valve.

problem could be solinoid. but at same time it could be dead transmission.
this was taken from google litterally the 1st thing that popped up when i typed "p0740 honda accord"

steve morris

• 1675 Answers
• Posted on Feb 08, 2010

SOURCE: I have a 1997 Grand Voyager and my check engine

p0700=internal trans controller pp0740=torque converter clutch control circuit0700 code means replace your TCM hope this helps

Harvey N Tawatao

• 3854 Answers
• Posted on Feb 22, 2010

SOURCE: PO700 PO740, check engine light on. Run a test on

PO700 is a code telling you there are codes in the TCM of some late model cars where the Transmission control module has lost connection to the PCM the vehicals main computer , And basically it happens when the TCM has a issue within itself or the transmission that sets a code and it sends a request for the PCM to illuminate the SES or CHECK engine light.
PO740 is a chrystler specific code that involves your Tourqe Converter Clutch Circuit (specifically The TCC solenoid) this code if not repaired quickly could cause major transmission problems....slipping out of gear....not shifting from first to second properly and just all around trans problems...eventually leading to no shifting at all...I highly recommend fixing it soon.

SOURCE: check light on 95 maxima code PO305 & PO325

Here you go:
P0305 Cylinder 5 Misfire Detected
P0325 Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)

The 305 is most likely caused by a faulty knock sensor.(325)