Silver88Turbo

Hello there,
My girlfriend has an '02 accord 4cyl with about 79,000 miles on it. Recently the transmission started acting funny. In D (or 1 for that matter) the car 'surges' from a stop. If you release your foot from the brake, the car will start to roll foward like it should, then it stops. Then starts again and stops. If you give it gas, the trans hesitates before it grabs. I am an Auto Tech student at SIU so I took the car to class and hooked up the PGM scan tool to check for A/T DTCs. Here is what I retrieved:

P1753- lockup sol A failure
P1705- gear position short
P1706- gear position open
P0753- Shift Sol A failure
P0758- shift sol B failure
P0720- C shaftspeed sensor failure
P0715- M shaftspeed sensor failure
P1768- linear sol A failure
P0763- shift sol A failure
P1773- linear sol B failure
P1738- 2nd pressure switch failure
P1739- 3rd pressure switch failure
P0740- TC clutch system failure
P0730- incorrect gear ratio
P0780- shift malfunction
P1750- clutch pressure failure
P1751- 2-3 shift malfunction

Now from what I know about auto transmissions, there is no way that all those things are not working. It shifts 2-3 and 3-4 just fine and the TCC is still activating. This leads me to believe there is a intermittent bad ground or power supply and perhaps the trans is in a failsafe mode.

I also went to retrieve engine DTCs despite the fact that the CEL is not on. Well, I pulled up over 40 codes!! Also, a lot of the codes contadicted each other such as: "TP sensore voltage too high", "TP sensor voltage too low". The engine has never skipped a beat and has ran flawlessly.

Starting with the basics I cleaned off both battery terminals, cleared the DTCs and they all came back. Due to limited time, I only checked a few grounds so far, one of them being PCM ground 101, right under the IAT sensor. After doing this I reset the codes again but this time they all came back WITH the check engine light.

I am kind of lost here. I will check all PCM grounds and power but I wanted to know if anyone has experienced anything like this or if anyone could give me advise. Any ideas?

Thanks,
Zach

ffHeart

Did you check all the fuses?

This bit of information may help explain why you're having so many codes:

Troubleshooting Multiple Indicator Lights:
The ABS/TCS and ATTS control units communicate with the ECM/PCM. If a DTC causes a loss of communication between two or more of these control units, the loss can cause multiple indicator lights to come on. For instance, when the ABS/TCS control unit stops getting data from the ECM/PCM, it sets a communication DTC such as TCS DTC 31 [engine retard command (PFINH)
signal]. This DTC doesn't mean there's a circuit or control unit failure. It just means the flow of data between the ABS/TCS control unit and the ECM/PCM has stopped. If you troubleshoot the PGM-FI system or the ABS/TCS first, and clear the DTCs, you'll most likely fix the problem.
As a general rule, troubleshoot DTCs that aren't related to communication first. For example, if DTC P1676 (FPTDR signal line failure) is set, and the ABS/TCS control unit has set a TCS DTC 24 thru 27 (TCS solenoid), troubleshoot the TCS DTC
problem first.
A second example: If the ECM/PCM sets a DTC P1498 (EGR valve position sensor circuit voltage high), and the ABS/TCS control unit sets a TCS DTC 31, you need to troubleshoot the DTC P1498 problem first.

For the following codes this info may help. Although it's meant to be tested with a Honda PGM-FI tester.

On 98–02 Accords with A/T and 99–02 Odysseys, if the PGM-FI main relay sticks after you turn the ignition switch to LOCK (0), the PCM will repeatedly set these A/T DTCs:
P0753 (shift solenoid valve A)
P0758 (shift solenoid valve B)
P1705 (transmission range switch short to ground)
P1768 (A/T clutch pressure control solenoid valve A)

To check for a sticking PGM-FI main relay, do this:
1. Connect your PGM Tester to the 16P data link
connector (DLC).
2. Turn the ignition switch to LOCK (0), and
watch the PGM Tester display screen:
• If you see the NO COMMUNICATION
message as soon as you turn the switch to
LOCK (0), the main relay is OK. Continue
with normal troubleshooting.
• If you don't see the NO COMMUNICATION
message, the PCM is still getting 12 volts,
which is most likely being supplied by a
faulty main relay. Replace the main relay.

Relic1

check your grounds.
clear all codes and see what comes back. they may have been accumulating for a long time.

PrettyLude

what kind of pgm tester are you using? normally the last eight hondas that came in for those tranny codes you are supplying you are pretty much done.

WillM

Problebly obvious, but you checked the fluid level right?