Hi, hoping someone here can provide guidance diagnosing a check engine light (CEL) issue on a stock NSX with OBD1. Here's what I've observed and done so far.
When I saw the CEL lit up, I pulled aside the road to check the engine bay and exhaust areas and nothing seemed abnormal. I then turned off the car, waited for a few minutes, and started it up again. The CEL was off so I drove around and all seemed ok.
During the same day, I jumped the blue service connector port under the glove box to retrieve the codes. The CEL showed 4 long blinks, then 3 short blinks, and then 1 quick blink (and it repeats the same sequence). Here's a recorded video of the CEL blinks: https://streamable.com/y7fnti
I cleared the stored CEL codes by pulling out the clock fuse, waited for about 1 minute to reset, and reinserted the fuse back in. I started up the NSX and the CEL was off. So I went out for a drive for a few miles and no CEL, so I thought the issue resolved itself.
The next day I drove around and the CEL came back on again. I turned off the car wait a few minutes and started it back up again and the CEL was off. Drove around some more and the CEL lights up again. I noticed the CEL tends to light up when tachometer reaches around 5,000 rpm.
I pulled the CEL code again and it's the exact same blinking sequence as before. The NSX appears to drive fine (no idle/no engine hesitation issues) when the CEL is on or off. I'm trying to figure out what the issue is based on the CEL codes.
I reviewed the 'www.nsxprime.com/wiki/Trouble_Codes' page, and I think it's CEL code #43 and/or #1 ? Or is it only code #43 ? Can someone with expertise help confirm if I'm interpreting the CEL codes correctly?
What steps should I follow to diagnose and pinpoint what's causing this check engine light issue?
When I saw the CEL lit up, I pulled aside the road to check the engine bay and exhaust areas and nothing seemed abnormal. I then turned off the car, waited for a few minutes, and started it up again. The CEL was off so I drove around and all seemed ok.
During the same day, I jumped the blue service connector port under the glove box to retrieve the codes. The CEL showed 4 long blinks, then 3 short blinks, and then 1 quick blink (and it repeats the same sequence). Here's a recorded video of the CEL blinks: https://streamable.com/y7fnti
I cleared the stored CEL codes by pulling out the clock fuse, waited for about 1 minute to reset, and reinserted the fuse back in. I started up the NSX and the CEL was off. So I went out for a drive for a few miles and no CEL, so I thought the issue resolved itself.
The next day I drove around and the CEL came back on again. I turned off the car wait a few minutes and started it back up again and the CEL was off. Drove around some more and the CEL lights up again. I noticed the CEL tends to light up when tachometer reaches around 5,000 rpm.
I pulled the CEL code again and it's the exact same blinking sequence as before. The NSX appears to drive fine (no idle/no engine hesitation issues) when the CEL is on or off. I'm trying to figure out what the issue is based on the CEL codes.
I reviewed the 'www.nsxprime.com/wiki/Trouble_Codes' page, and I think it's CEL code #43 and/or #1 ? Or is it only code #43 ? Can someone with expertise help confirm if I'm interpreting the CEL codes correctly?
What steps should I follow to diagnose and pinpoint what's causing this check engine light issue?