Honda Accord 2008 Manual page 524

PGM-FI System
DTC Troubleshooting (cont'd)
DTC P0141: Rear Secondary H02S (Bank 1,
Sensor 2) Heater Circuit Malfunction
DTC P0161: Front Secondary H02S (Bank 2,
Sensor 2) Heater Circuit Malfunction
N O T E :
• B e f o r e y o u t r o u b l e s h o o t r e c o r d a l l f r e e z e d a t a a n d
a n y o n - b o a r d s n a p s h o t a n d r e v i e w t h e g e n e r a l
t r o u b l e s h o o t i n g i n f o r m a t i o n ( s e e p a g e 1 1 - 3 ) .
• I n f o r m a t i o n m a r k e d w i t h a n a s t e r i s k (*) a p p l i e s t o t h e
f r o n t b a n k ( B a n k 2 ) .
1. T u r n t h e i g n i t i o n s w i t c h t o O N (II).
2. C l e a r t h e D T C w i t h t h e H D S .
3. S t a r t t h e e n g i n e .
4. C h e c k f o r T e m p o r a r y D T C s o r D T C s w i t h t h e H D S .
Is DTC P0141 and/or P0161* indicated?
Y E S — G o t o s t e p 5.
N O — I n t e r m i t t e n t f a i l u r e , t h e s y s t e m s is O K a t t h i s
t i m e . C h e c k f o r p o o r c o n n e c t i o n s o r l o o s e t e r m i n a l s
a t t h e s e c o n d a r y H 0 2 S ( S e n s o r 2 ) , t h e P G M - F I
s u b r e l a y , a n d t h e E C M / P C M . •
5. T u r n t h e i g n i t i o n s w i t c h t o L O C K (0).
6. C h e c k t h e N o . 14 Fl S U B (15 A ) f u s e i n t h e u n d e r -
h o o d f u s e / r e l a y b o x .
Is the fuse OK?
Y E S — G o t o s t e p 7.
N O — G o t o s t e p 1 9 .
7. R e m o v e t h e P G M - F I s u b r e l a y ( A ) f r o m t h e u n d e r -
h o o d f u s e / r e l a y b o x .
A
8. T e s t t h e P G M - F I s u b r e l a y ( s e e p a g e 2 2 - 3 8 ) .
Is the relay OK?
Y E S — G o t o s t e p 9 .
N O — R e p l a c e t h e P G M - F I s u b r e l a y , t h e n g o t o s t e p
2 5 .
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