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3 .
4 .
DTC P0135: Primary HO2S (Sensor 1) Heater
Circuit Malfunction
DTC P0141: Secondary HO2S(Sensor
2)
Heater Circuit Malf unction
NOTE: Information marked with an asterisk (* ) applies
to DTC P0141.
1 . R e s e t t h e E C M ( s e e p a g e 1 1 - 4 ) .
2 . S t a n t h e e n g i n e .
ls DTC P0135 ot P0141 indicated?
YES- Go to step 3.
NO Intermittent failure. system is OK at this time.
Check for poor connections or loose terminals at
the primary HO2S (Sensor 1) or secondary HO2S
( S e n s o r 2 ) a n d a t t h e E C M . I
Turn the ignition switch OFF.
Disconnect the H02S (primary or secondary * )
(Sensor 1 or Sensor 2 * ) 4Pconnecror,
5. At the HO2S side, measure resistance between
HO2S 4P connector terminals No. 3 and No. 4.
PRIMARY HO2S lsensor 1l
SECONDARY HO2S {Sensor 2,
4PCONNECTOR
4P CONNECTORT
Terminal side of
wire side of
male terminals
female terminals
ls there about 3.3 A (12
14.3 A )" ?
YES Go to step 6.
N O - R e p l a c e t h e p r i m a r y H O 2 S ( S e n s o r 1 ) o r
secondary HO2S (Sensor 21 x .1
6. At the HO2S side, check continuity be&veen body
ground and HO2S 4P connector terminals No. 3
a n d N o . 4 i n d i v i d u a l l y .
PRIMARY HO2S (Sonsoi'll
SECONDARY HOzS {Sensor2)
4PCONNECTOR
ilP CONNECTORT
YES Replace the HO2S (primary or secondary * )
(Sensor 1 or Sensor 2 * ). t
NO Go to step 7.
Turn the ignition switch ON (ll).
Measure voltage between H02S 4P connector
t e r m i n a l N o . 3 a n d N o . 4 .
PRIMARY HO2S (Sensor 1) SECONDARY HO2S tsensor 2l
4PCONNECTOR
4P CONNECTOR*
7 .
8 .
Wire side of
female terminals
Terminal side of
m a l e t e r m i n a l s
ls there continuity?
Wire side of
female terminals
ls there battety voltage?
YES Go to step L
NO- Go to step 13.
rcr f-fi]
pozsnrc
( B L K / I I I Z I { B L K / W H T I
YEL) f--t--
-
3 l 4 l l
L-{o---l
so2sHTc
{BLK/WHT)
t G l
IBLK/
YEL}
(cont'd)
Terminal side of
male terminals
1 1 - 6 1
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Troubleshooting
