02 Accord EX 2.3 Vtech Misfiring P0300,P1399,P0301,P0302,P0304
Super Moderator : And A Texan
Joined: Feb 2007
Posts: 9,652
From: Katy, TX
In earlier models (94-97) this sensor is in the distributor. Not sure about yours.
You will need a shop manual to locate sensor and diagnose. Check automanualsource.com for a reasonable cost OEM emanua.
This is same obd1 code (Code 9) I got on my 94EX that eventually was traced to defective ECM. To diagnose the source of the problem, you measure the resistance of the sensor; first at connector nearest the sensor and if good move to the connction of the wiring harness to the ECM. If sensor resistance checks good at this point, the ECM is faulty. On 94-97 Accord the Vtec engine CYP sensor resistance was 350-700 ohms.
good luck
You will need a shop manual to locate sensor and diagnose. Check automanualsource.com for a reasonable cost OEM emanua.
This is same obd1 code (Code 9) I got on my 94EX that eventually was traced to defective ECM. To diagnose the source of the problem, you measure the resistance of the sensor; first at connector nearest the sensor and if good move to the connction of the wiring harness to the ECM. If sensor resistance checks good at this point, the ECM is faulty. On 94-97 Accord the Vtec engine CYP sensor resistance was 350-700 ohms.
good luck
Super Moderator
Joined: Oct 2010
Posts: 7,099
From: United States
The cylinder position sensor (CYP sensor) is part of the distributor housing, if it turns out to be the CYP sensor, then the distributor housing needs to be replaced. The distributor housing is separately available without purchasing the whole distributor. See picture:
https://www.hondaaccordforum.com/for...cyp-sensor-jpg
Honda part number 30105-PAA-L01 is just the housing without the igniter, coil, and rotor (since you already purchased those). There are aftermarket housing available too.
https://www.hondaaccordforum.com/for...cyp-sensor-jpg
Honda part number 30105-PAA-L01 is just the housing without the igniter, coil, and rotor (since you already purchased those). There are aftermarket housing available too.
Last edited by redbull-1; Jun 17, 2012 at 03:53 PM.
Joined: Jun 2012
Posts: 1
i dont know if u fixed the problem off all those misfires...but i had the same problem and i did all that but the last thing i replaced was the alternator...ever since i did it last week my car hasnt jerked and it runs pretty good...the only thing is that i still have code p0302...but im working on that...try that change the alternator and see wat happens it worked for me
Super Moderator
Joined: Oct 2010
Posts: 7,099
From: United States
i dont know if u fixed the problem off all those misfires...but i had the same problem and i did all that but the last thing i replaced was the alternator...ever since i did it last week my car hasnt jerked and it runs pretty good...the only thing is that i still have code p0302...but im working on that...try that change the alternator and see wat happens it worked for me
I forgot about it until you mentioned it. There's more info. regarding that in this other thread:
https://www.hondaaccordforum.com/for...me-back-37560/
Most of the 4 cylinders had the Denso alternators, a better alternator. The alternator should probably be tested first before replacement, to avoid just throwing a part (money) at it.
Thread
Thread Starter
Forum
Replies
Last Post
