The check engine light on my stock '96 NSX is reporting nine long blinks followed by two short blinks. I can't find a code 92 in any of the troubleshooting manuals. I've repeated the procedure multiple times and each time I get a 92. There are no pauses between the blinks, so I don't think it's reporting multiple codes.

Does anyone have any idea what this code means?
Thanks in advance.

 

DTC 92 is for an evaporative emission control system incorrect flow.
A few items to check are: EVAP purge control valve solenoid, EVAP purge contol valve solenoid circuit, EVAP purge flow switch, EVAP purge flow switch circuit, throttle body purge port, tubings, and ECU.

 

Excellent! Thanks for the info.

 

Would you happen to know the strategy the ECU used in determing "incorrect flow"?

Did it close/open something and look for an increase/decrease in another sensor(s)?

For instance, Code 90; From what I understand, the ECU closes one of the EVAP valves that allows flow out of the fuel tank and looks for an increase in fuel tank pressure (this was to detect pin holes in the tubing).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EE_Chris &raquo;</TD></TR><TR><TD CLASS="quote">Would you happen to know the strategy the ECU used in determing "incorrect flow"?

Did it close/open something and look for an increase/decrease in another sensor(s)?

For instance, Code 90; From what I understand, the ECU closes one of the EVAP valves that allows flow out of the fuel tank and looks for an increase in fuel tank pressure (this was to detect pin holes in the tubing).</TD></TR></TABLE>
The ECU closes the vent shut valve and opens the purge control solenoid to apply vacuum to the system. Then it uses the bypass solenoid valve to isolate either the tank side or the canister side of the system. Then it moniters the fuel tank presure sensor to look for leaks. It's supposed to be able to detect holes smaller than .040 inch.