1998 HONDA INTEGRA engine

PGM-FI System
Primary,Heated Oxygen Sensor (HO2S) (Sensor 1) (cont'dl
The scan tool indicates Diagnostic Trouble Code (DTC) P0133: A slow response problem in the Primary
Heated Oxygen Sensor (HO25) (Sensor 1) circuit.
Description
By controlling the airlfuel ratio with a Primary HO2S (Sensor 'l) and a Secondary HO2S (Sensor 2), the deterioration of the
primary HO2S {Sensor 1) can be evaluated by its teedback period. When the feedback period of the HO2S exceeds a cer-
lain value during stable driving conditions, the sensor will be judged as deteriorated.
When deterioration has been detected during two consecutive trips, the MIL comes on and DTC P0133 will be stored
NOTE: ll DTC P013't, P0132 and/or P0'135 are stored at the same time as DTC P0133, troubleshoot those DTCS first, then
troubleshoot DTC P0133.
Possible Cause
. Primary HO2S (sensor 1) Deterioration
o Primary HO2S Heater (sensor 1) Deterioration
. Exhaust system leakage
Troubl€shooting Flowchart
')
litll r
- Tho MIL has boon raDortcd on.- DTC P0133 is storcd.
Problem verificttion:1. Do the ECM Reset Procedure.2. Start the engine. Hold thoengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on.3. Connect the SCS service con-
4. Test'drive Lrnder f o llowingconditions.* 55 mph (89 km/h) steadyspeed- NT in E position, M/T in5th gear- Until readiness code com€son
lnt.flnittcnt ftilu... ay3tam ia OKat thb tiinr. Ch.ck fo. poor con-necliona o. looaa wita! al Cll3
lPrim.ry HO2S lscn.or lll lndECM.
ls DTC P0133 indicated?
Roplacs the Primary HO2S lscn-3or 1),

Secondary Heated Oxygen Sensor (HO2S) {sensor 2l
The scan tool indicates Diagnostic Trouble Code (DTC) P0137: A low voltage problem in the SecondaryHeated Oxygen Sensor (H02S) (Sensor 2) circuit.
(cont'd)
The MIL ha3 been reDorted on.DTC P0137 is storod.
Problem veritication:1. Do the ECM Reset Procedure.2. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on,3. Check the Secondary H02S(Sensor 2) output voltage at3,000 rpm with the scan 1ool.
Inte.mittent failure, system is OKat lhb time. Ch6ck Ior ooor con-nections or loose wires at C451lSeconddry HO2S {Sensor 2)l andECM.
Does the voltage stay at 0.3 Vor less?
Check for a short in th€ HO2S:1. Turn the ignition switch OFF.2. Discon nect the SecondaryHO2S (Sensor 2) connector.3. Start the engine.4. Check the Secondary H02S(Sensor 2) output whh the scantool.
Does the voltage stay at 0.3 Vor less?
Check tor a short in the wire{SHO2S line):r. I urn rne rgnt on swttch uFF,2. Disconnect the ECM connec,tor D 116P).3. Check for continuity betweenNo. '1 terminal on the Secon-dary HO2S {Sensor 2) connector and body ground.
Ropair short in tho wira bctweenECM (D14) and Secondrry HO2S{Senso.2).
ls there continuity?
Substitute a known-good ECMand recheck. It symptom/indice-taon goes away, replace the origi-nel ECM.
SECONDARYHO2S (Sensor 2l CONNECTOR C451
sHo2sIBLU/REDI f- --
T-l 1 2ltr11(Or ls rl
L
Wire side oI fernale terminals
11-71

PGM-FI System
Secondary Heated Oxygen Sensor (HO2S) (Sensor 2l (cont'd)
The scan tool indicates Diagnostic Trouble Code (DTC) P0138: A high voltage probiem in the Secondary
Heated Oxygen Sensor {HO2Si (Sensor 2) circuit.
YES
The MIL has been reported on.DTC P0138 is stored.
Problem verification:1. Do the ECM Reset Procedure2. Startthe engine. Holdtheengineat 3,000 rpm with no load (in
Park or neutral) untilthe radia'
torfancomeson.3. Check the secondary HO2S(Sensor 2) outPUt vo ltage at
3,000 rpm withthe scan tool.
lntermittent lailur€, svsted i3 OK
at this time. Chock tor Poor con'
nections or loo3e wires at C451
lSecondary HO2s lsensor 2ll and
ECM,
Does the voltage stay at 0.6 V
ls there 0.6 V or more?
Check for an open in the wite
{s()2S line):1. Turn the ignition switch OFF.2. Connect ECM connector ter-minals D13 and Dl4 with ajumper wire.3. Turn the ignition switch ON (ll).
4. Check the Secondary HO25(Sensor 2) output voltage withthe scan tool,
Repair opsn in the wire b€tweonECM {D14 or O13} and SecondaryHO2S {Sensor2).ls there 0,6 V or more?
Substitute a known-good ECMend r6check. It symptom/indica-tion goes away, rcplace the origi-nal ECM.
tI
t$
ffi
tljl'l
t,
lfi
il
fl'I
Check for an open in the HO2S:1. TLrrn the ignition switch OFF.2. Disconnect the SecondaryH02S (Sensor 2) connector.
3. Connect the Secondary HO2S(Sensor 2) 4P connector ter_
minals No. 1 and No.2 with ajumper wire.4. Turn the ignition switch ON (ll).
5. Check the Secondary HO25(Sensor 2) output vo lta ge
with the scan tool.
SECONDAFY HO2S {Sensor 2l CONNECTOR C451
sHo2sIBLU/REDIsHo2s GNOIONN/BLUI
Wire side of female terminals
ECM CONNECTOR D I16P}
sHo2sGND{ORN/BLUI
sHo2sIBLU/RED)
Wire side of female terminals
JUMPER WIRE
i 11-72L

The scan tool indicates Diagnostic Trouble Code (DTC) P0139: A slow response problem in the SeconoarvHeated Oxygen Sensor (H02S) (Sensor 2) circuit.
The MIL has boen reDorted on.DTC P0139 b sto.od.
P.oblem ve tication:1. Do the ECM Reset Procedure.2. Start the engine. Hotd theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on,3. Check the Secondary HO2S{Sensor 2) output ar 3,000 rpmth the scan tool.
Intarmittert lailurg, systsm i! OKat thi! time. Chsck for Door con-nections o. loose wi.es at C451Secondary HO2S lsonsor 2) .ndECM.
Does the voltage stay within0.3 - 0.6 V tortwo minutos?

PGM-FI System
Heated Oxygen Sensor (HO2S) Heater
The scan tool indicates Diagnostic Trouble code (DTC) P0135: A problem in the Primary Heated oxygen
Sensor lHO2S) (Sensor 'l) Heater circuit
The scan tool indicates Diagnostic Trouble Code (DTC)P0141: A problem in the Secondary Heated Oxygen
Sensor {HO25) {Sensor 2) Heater circuit
Fo13sl
lFol4il
PRIMARY Ho2S (sen3or 1) CONNECToR C113,
SECONDARY HO2S (sensor 2l CONNECTOR Cil51'
Terminal side of male terminals
PRIMARY HO2S (SonSor 1l CONNECTOR Cl13,
SECONDARY HO2S lsan3or 2) CONNECTOR C451r
o2sHTC(BLK/WHT,
GRN/REO'}
IGP{YEL/BLK}lGlr(BLK/YEL)
(To page 11-75)*: P0141
- The MIL has been rePorted on- DTC P0135 and/or P0141 ate
stored.
Probl€m verilication:1. Do the ECM Reset Procedure
2. Start the engine.
lnt€rmitlent failure. 3vslem is OK
at this time. Check for Poo. con'
noction3 o. loose wire ai Cl13(Primary HO2S (S.nsor 1ll. gl51
lSocondary H02S lSensor 2))'
and ECM.
Check for an open or short in tho
HO2S:1. Turn the ignition switch OFF.2. Disconnect the Primary HO2S(Sensor 1) Secondary HO2S
{Sensor 2)'connector,3. At the HO2S side measureresistance between the 4P con-nector No. 3 and No. 4 terminals on the HO2S side.
ls there 10 - 40 0?
Check Ior continuity betweenbody ground and the HO2S 4P
connector lerminals No. 3 andNo.4 individually.
ls there continuity?
Ch€ck for an open or short in thewir63 (lGP, lG1*, O2SHTC lines):1. Turn the ignition switch ON (ll).
2. Measure voltage between No.3 terminal and No. 4 terminalon the harness side of the 4P
ls there batlery vohage?
{1o page 1l-75)Wire side of female terminals

Troubleshooting Flowchart
HIGH
- The MIL ha3 been rcoortod on.- OTC P0171 andlor PO'l72.re3tored.
ls the Iuel pressure OK?
ls the fuel pressure too highChock th€ luel p.essure regulator,and tu€l return pipe.Ch€ck the Primary HO2S:1. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator lan comes on.2. Check the Primary HO2S{Sensor 1) output with thescan tool.
Chock the tuel pump, fuel feodpipe, fuol fiher, and tuol prcssureregulator.
Does it stay at less than 0.3 Vor more than 0.6 V?Rapl.ce the Primary HO2S {Sen-3or ll.
Check lor a sticking or l€akingEVAP purge control solenoid
With a vacuum pump, apply vacu,um to the EVAP purge controlsolenoid valve.
Does it hold vacuum?
Chock the valvc cl6a.ance3 andadjust it nocessary. lf th. valvocloarance3 are OK, reDlaco thGtuel ini€cto6.
11-77

PGM.FI
Misfire
System
Detected in One Cylinder (cont'd)
)
Troubleshooting Flowchart
ff
i
)
NOTE:.lf there is no freeze data of misliring,just clear the DTC.'lf there is no freeze data of misfiring,test drives under various conditions
The MIL has b6€n reported on.DTC P0301, P0302, P0303 0rP0304 is indicated.
Check the fuel iniector function:Stan the engine, and listen for aclicking sound at the fuel injectorin the problem cylinder.
Check for an open or shon in theharness between ECM and thefUel injector.
Repair open or short in the wiro.
- Replace tho luel inisctor.- Sub3titute a known-goodECM and rach€ck. It symptom/indicrtion 90e3 away, replacethe original ECM.
Problem ve.ification:1. After checking the freeze data,do the ECM Reset Procedure.2. Exchange the spark plug fromthe problem cylinder with oneof another cylinder.3. Connect the SCS service connector.4. Test-drive the car several timesin the range of the treeze data.
(To page 11-81)

(From page l1-80)
Iniermittenl misfire due lo sparkplug fouling, otc. Iti.ing is OK atthis timo).
Does the misfire occur in theother cylinder whose spark plugwas exchanged?Replace the faultv spark plug.
Check for tuel ini€ctor maltunc-taon:1. Exchange the fuel injectorfrom the problem cylinderwith one from another cylin'der.2. Let the engine idle lortwo min-uteS.3. Test-drive the car sevoraltimesin the range ofthe treeze data.
Int€rmitt€nt mislire due to badcontact in tho tuel iniector con-nector lfiring is OK at thb time).
Does the misfire occur in theother cylinder whose tuel injectorwas exchanged?Replace the laultv tuel iniector.
Check the following items- Cylinde. lerk-down- Compaession- Crankshafl Position (GKPI son-
NOTE: lf there is no freeze data of misfirang, test drives under various condi-trons are necessary.
1 1-81