I have a 2004 Honda Accord EX V6 w/ automatic transmission. I find when I am in regular drive and increase rpms up to a range of around 5500 it shifts but only after shuttering and delaying. I have shifted through the gears independently and some of the codes pointed to the VTEC system but I have checked the VTECH oil pressure switch and it is functioning fine. The shutter is quite noticeable and does not feel like slipping discs. Without an expensive barage of diagnostics, I would at least like to know the direction of what the possibilities are as to what is wrong. Has anyone ever experienced this before and what are some of the possibilities I might encounter. Thank you very much for your information as none of the shops will even test drive the car without me hiring them again thanks in advance.

No modifications at all to the car. BAYA spec transmission, no recalls listed using the VIN number.

Josh

 

What codes are you getting, please post the actual codes.

 

Codes:
P0762
P0430
P2646

 

Codes:
P0762 - Transmission Shift Solenoid C stuck on
P0430 - Bank 2 catalytic converter inefficiency.
P2646 - Vtec oil pressure switch - low voltage

I'd start with the P2646, then P0762.

For both codes, check your oil level and transmission fluid levels.

 

As PAhonda mention, check the fluid levels.

Also check condition of the fluids.

1. First attached image is VTEC oil pressure switch location.

2. Second attached image is Shift Control Solenoid Valve C location. Valve C has the brown electrical connector.

1. Disconnect shift solenoid valve C connector.
2. Measure shift solenoid valve C resistance at the terminals. Standard: 12 – 25 ohms.
3. If resistance is within standard, connect terminal no. 1 (where black wire was) to body ground (-), and battery power (+) to terminal no. 2 (where Grn wire was).

3. Third image is location of Bank 2 converter at front.