Dtc P0300: Random Misfire And Cylinder Misfire; Dtc P0301 - Dtc P0304: No. 1 - 4 Cylinder Misfire - Honda S2000 Service Manual

PGM-FISystem
DTC Troubleshooting (cont'd)
DTC P0300: Random Misfire and Any Combination of the Following:
DTC P0301: No. 1 Cylinder Misfire
DTG P0302: No. 2 Cylinder Misfire
DTG P0303: No. 3 Cylinder Misfire
DTC P0304: No. 4 Cylinder Misfire
NOTE:
. l f t h e m i s f i r i n g i s f r e q u e n t e n o u g h t o t r i g g e r d e t e c t i o n o f i n c r e a s e d e m i s s i o n s d u r i n g t w o c o n s e c u t i v e d r i v i n g c y c l e s ,
the MIL will come on, and DTC P0300 {and some combination of P0301 through P0304) will be stored.
. lf the misiiring is frequent enough to damage the catalyst, the MIL will blink wheneve r the misfiring occurs. and DTC
PO3OO (and some combination of P0301 through P0304)will be stored. When the misfiring stops, the MIL will remain
o n .
1. Troubleshoot the following DTCS first if any of them were stored along with the random misfire DTC(S):
P0107, PO108, P1128, P1'129: l\4anifold Absolute Pressure (MAP) Sensor (see page
'l 'l -52)
P 0 1 3 1 , P 0 1 3 2 : P r i m a r y H e a t e d O x y g e n S e n s o r ( p r i m a r y H O 2 S ) { s e e p a g e 1 1 - 6 5 )
P017'1,P0172t Fuel Metering (see page 11-65)
P0335. P0336: Crankshaft Position (CKP) Sensor{see page I1-81)
P0505: ldle Control System (see page 11-100)
P1259:VTEC System (see page 6-6)
p1361, P1362, P']366, P1367: Camshaft Position (CMP) Sensor (Top Dead Center (TDC) Sensor) A,/B (see page 1 1-
9 1 )
P15'19: ldle Air Control (lAC) Valve (see page 1 1-102)
2. Test-drive the vehicle to verify the symptom.
3. Findthesymptom in the chart below, anddothe related procedures in the orderlisted until you find the cause.
Svmptom
Procedure{s)
Also check for:
Random misfire only at
low RPM and load
Check fuel pressure (see page 11-105).
. LOW COmpreSSlOn.
. Low qualitv fuel.
Random misfire only
during acceleration
C h e c k f u e l p r e s s u r e { s e e p a g e 1 1 - 1 0 5 ) .
Malfunction in the
VTEC system (see
Daqe 6-6).
R a n d o m m i s f i r e a t h i g h
RPM and load, or under
random conditions
C h e c k f u e l p r e s s u r e ( s e e p a g e 1 1 - 1 0 5 ) . Correct valve
clearance (see page
6-6).
1 1 - 6 4
tt