2004 Honda Civic LX Coupe P0134, upstream oxygen sensor no activity
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I have a 2004 Honda Civic Coupe LX with 130K miles on it. My exhaust manifold was cracked so replaced with a Dorman (674-608) and both oxygen sensors. After a few days my car struggling/hesitating while accelerating. The codes were P0135 and P0134. It seemed like my upstream oxygen sensor NTK 24425 was only an oxygen sensor, but not an air-fuel oxygen sensor. So I got an upstream Denso 234-9005 air fuel ratio oxygen sensor and the hesitation is gone and the car runs smooth. However, the P0134 (bank 1 sensor 1, no activity) check engine light is still on. I cleared the engine light numerous times and still no luck. I replaced the ECM fuse under the hood and replaced the Air fuel relay fuse under the dash, but still no luck (all the fuses I replaced were working fine). After clearing the check engine light and starting the car the light comes on within 2 minutes. I read here (on RepairPal) that there may be a PCM software update? Anyone do this? Please help. Thank you.
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Yes, I just got a scanner. When I clear the code it detects activity, but obviously when the code is there nothing. Anything you suggest I do differently? I have an Ancel AD410 budget scanner.
Update: I installed the Honda oxygen sensor (part #: 36531-plm-306) and the check engine light never came on. I have now driven over 500 miles and no check engine light. Seems my issue is now solved.
Yes, I just got a scanner. When I clear the code it detects activity, but obviously when the code is there nothing. Anything you suggest I do differently? I have an Ancel AD410 budget scanner.
Update: I installed the Honda oxygen sensor (part #: 36531-plm-306) and the check engine light never came on. I have now driven over 500 miles and no check engine light. Seems my issue is now solved.