Check Engine Light (CEL)


#1

1999 Acura Integra 73k miles



On Jul 28th Dealer did an inspection - no issues.



Most fluids are changed (didn’t check the AT fluid today)



Today, I drive from San Jose to Santa Cruz with A/C on and by the time I arrived there, I noticed the CEL is steadily on. I never had this issue on any of my cars. I did drove it back with the CEL on - runs fine for me.



It only pulled one code - the OBD II tried to pull another code, but no luck. It appears if it gives P0700, then it should give another code with it.

P0700: Transmission Control System (MIL request)



What’s happening?


#2

The code is telling you that someone needs to scan the transmission. Maybe it sounds odd, but all the code says is that the transmission control detected a problem. So yes, there are probably more codes, but those are probably stored in a TCM (rather than the PCM). There are many codes that standard OBD readers won’t pick up (like transmission or body codes).

So your best bet is to take it to a local, independent transmission shop and have them scan it.


#3

its
P0740 - Torque converter clutch malfunction

It maybe due to a earth connection - not sure how to check it?