1997 HONDA CIVIC engine code

PGM-FI System
Throttle Position (TP) Sensor (cont'd)
- The MIL hss been.eported on.- DIC P1121 i. stored.
Problem vedficatiod:1. Turn the ignition switch ON (ll).
2. Check the throttle position
with the scan tool.
ls TP *% or higher indicatedwhen the throftle is tullyopenod?
Intermittent tailure, ryttem i! OKrtthistimo.
I Pl 121 | The sca n tool indicates Diag nostic Trouble Code (DTC) Pl 121: Throttle Position (TP) lower than expected.
*: 11.8 {D16Y5 enginei12.9 {016Y7 engine)12.2 (D16Y8 engine)13.7 (816A2 engine)
I P1122 I The scan tool indicates Diagnostic Trouble Code (DTC) P1122: Throttle Position (TP) higherthan expected.
*: 16.5 {Dl6Y5, Dl6Y8 engine}16.9 (D16Y7 engine)16.5 (81642 engine)
- The MIL ha3 be6n repoJted on.- DTC Pl122 i. llorod.
P.oblom v6dfication:1. Turn the ignition switch ON (ll).
2. Check the throttle position
with the scan tool.
ls TP'70 or l€ss indicated whenthe throttle is fully closed?Intormitt6ot frilu.o, aFtom b OKat thb timo.
1 1-138

Primary Heated Oxygen Sensor {Primary HO2SI (Sensor 1)
t('96 - 98 Models except Dl6Y5 engine with M/Tl
The Heated Oxygen Sensor (HO2S) detects the oxygen content in the exhaust gas and signals the ECM/PCM. In operation,
the ECM/PCM receives the sjgnals from the sensor and varies the duration during which fuel is injected To stabilize the
sensor,s output, the sensor has an internal heater. The Primary HO2S (Sensor 1) is installed in the exhaust manifold.
HO2S:
VOLTAGE {VI
The scan tool indicates Diagnostic Trouble Code (DTC) P0131; A low voltage
Oxygen Sensor (H02S) (Sensor 1) circuit.
R|cH-AIR- - LEANFUELRANO
problem in the Primary Heated
SENSOR
ztRcoNlA
The MIL has be€n teported on.DTC P0131 is siorcd.
Problom verificalion:1. Do the ECM/PCM Reset Pro'
cedure.2. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on,3. Test-drive with the A/T in Eposition (M/T in 4th gear)
4. Check the Primary HO2S(Sensor 1) output voltage with
the scan tool during accelera-
tion using wide open throttle.
lntcrmift€nt failura, 3Y3tem is OKat this tims. Check for Poor con-nections or loo3e wi.o3 at C123(Primlry HO2S, 3sn3or 1) and
ECM/PCM,
(To page 1I-140)
{cont'd)
1 1-139

Primary Heated Oxygen Sensor (Primary- Fjq?S) (Sensor 1l
('99 - 0b Models exiept D16Y5 engine with M/T)
TheHeatedoxygensensors(Ho2S)detecttheoxygencontentintheexhaustgasandsigna|stheEcM/PcM'|noperation,
the EcM/pcM receives the signars from the sensor and varies the duration during which fuel is injected. To stabilize the
sensor,soutput,thesensornasaninternaIheater.ThePrimaryHo2S(sensorl)isinsta|ledinexhaustmanifo|d(D16Y8.
81642 engine: exhaust PiPe A)
SENSORTERMINALSVOLTAG€ (VI
HEATERTERMINALS
The scan tool indicates Diagnostic Trouble Code (DTC) P0131: A low voltage
Oxygen Sensor (HO2S) (Sensor 1) circuit
RICH+ AIR- - LEANFUELRATIO
problem in the Primary Heated
HEATER
- The MIL has been t€Ported on.- DTC P013'l is stored.
Problem veritication:1. Do the ECM/PCM Reset Pro-
2. Start the engine. Hold the
engine at 3,000 rpm wrth no
load (in Park or neutral) until
the radiator fan comes on
3. Check the PrimarY HO2S
lSensor 1) output voltage wath
the scan tool during accelera
tion using wide open throttle
lntermittont f.ilure, 3ystem i3 OK
at thi3 time. Check tor Poor con'
nections or loose wires el C123
{Primary HO2S, Sensor 1) and
ECM/PCM.
Does the voltage stay at 0 5 v
or less?
Check the fuel pressLlre (see Page11,109).
(To page 11 142)(cont'd)
11-141

Primary Heated Oxygen Sensor (Primary HO2SI (Sensor 1)
('96 - 9b Models except Dl6Y5 engine with M/Tl
PHO29IWHT}
The scan tool indicates Diagnostic Trouble Code (DTC) P0132: A high voltage problem in the Primary Heated
Oxygen Sensor (Primary H02S) (Sensor'l) circuit.
PRIMARY HO2S (Sonso. 'll 4P CONNECToR
tc123t
sG2IGRN/BLKI
Wire side ot female terminals
ECM/PCM CONNECTOR D I16PI
JUMPER WIRE
PHO2S (WHT}SG2 IGRN/BLKI
Wire side of tem6le terminals
Probl€m verification:1. Do the ECM/PCM Reset Pro-
cedure.2. Start the engine. Hold the
engine at 3,000 rpm with no
load (in Park or neutral) until
the radiator fan comes on
3. Test-drive with the A/T in Eposition (M/T in 4th gear)
4. Check the PrimarY HO2S(Sensor 1) oLltPut voltage with
the scan tool during decelera'tion using completely closed
throttle.
Int.rmittont fiilur., system it OK
at thb timo. Chock for Poot con-
nections or loo3a wir63 at Cl23
lPrimarY HO2S, SensoJ 1l .nd
ECM/PCM.
Does the voltage stay at 1.0 V
or more?
Check for an open in the Primary
HO2S:1. Turn the ignition switch OFF.
2. Disconnect the Primary HO2S(Sensor 1) 4P connector'
3. Connect the PrimarY HO25
lSensor l) 4P connector termi-
nals No. 1 and No. 2 with a
4. Turn the ignition switch ON (ll).
5. Check the PrimarY H02S(Sensor 1i outPut voltage with
the scan tool.
lsthere 1.0 V or more?
Check for an open in the wiro
{PHO2S line):1. Turn the ignition switch OFF.
2. Connect EcM/PcM connector
terminals D7 and D11 with ajumper wrre,3. Turn the ignition switch ON lll)4. Check the PrimarY HO2S(Sensor 1) output voltage withthe scan tool,
Replir open in tho wirc b€twccnECM/PCM lo?) and Prim!.Y
HO2S lsonsor 1).ls there 1.0 V or more?
Substitute a known-good ECM/PCM and recheck. lf 3ymptom/indicetion goos awey, roplacethe oliginal ECM/PCM.
11-143

PGM-FI System
Primary Heated Oxygen Sensor (Primary HO2SI (Sensor 1)
('99 - 00 Models except D16Y5 engine with M/T)
The scan tool indicates Diagnostic Trouble Code (DTC) P0132: A high voltage problem in the primary HeatedOxygen Sensor (Primary HO2S) {Sensor I ) circuit.
PRIMARY HO2S ls€n3or 1' 4PCONNECTOR(c123t
PHO2SIWHTI
Wire side of temale terminals
ECM/PCM CONNECTOR C 131PI
sG2(GRN/
BLK)
SG2 IGRN/8LK}
Ware side of female terminals
The MIL has been reported on.OTCP0132 is stored.
Problem vorificalion:1. Do the ECM/PCM Reset Procedure,Start the engine. Hold theengane at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on.Check the Primary HO25{Sensor lioutput voltage withthe scan tool during decelera-taon using completely closedthrottle.
Intermittent tailure, systom k OKat this time. Chock tor poor con-nections or looso wir* at Cl23(Primaly HO2S, Sonsor 1) andECM/PCM.
Check lor an open in the PrimaryH02S:1. Turn the ignition switch OFF.2. Disconnect the Primary HO2SlSensor 1)connector.3. Connect the Primary H02S(Sensor 1)4P connector terminals No. 1 and No. 2 with a
4. Turn the ignition switch ON (ll).5. Check the Primary H02S{Sensor l) output voltage withthe scan tool.
ls there 1.5 V or more?
Check lor an open in th€ wire(PHO25 lin€l:1. Turn the ignition switch OFF.2. Connect ECM/PCM connectorterminals C16 and C18 with ajumper wire.3. Turn the ignition switch ON {lli.4. Check the Primary HO2S(Sensor 1i output voltage withthe scan tool,
Roptir op.n in tho wire betweonECM/PCM lCl6l and Prim.ryHO2S lsensor 11.
ls there 1.5 V or more?
Subsiitute a known-good ECM/PCM and r.check. lf symptom/indication goos away, replecethe original ECM/PCM.
11-144

Primary Heated Oxygen Sensor (Primary HO2S) (Sensor 1l
The scan tool indicates Diagnostic Trouble Code (DTC) P0133: A slow response problem in the Primary Heated
Oxygen Sensor {Primary H02S) (Sensor 1) circuit.
The scan tool indicates Diagnostic Trouble code (DTC) Pl163: A slow response problem in the Primary Heated
Oxygen Sensor (Primary HO2S) (Sensor 1)circuit
Description
By controlling the airlfuel ratio with a Primary Ho2S {Sensor 1) and a secondary HO2S {Sensor 2), the deterioration of the
primary HO2S (Sensor 1) can be evaluated by its feedback period. when the feedback period of the Ho2s exceeds a cer-
tain 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 or P1163* will be stored'
NOTE: tf DTC P0131, P0132 and/or P0135 are stored at the same time as DTC P0133, troubleshoot those DTCS first' then
troubleshoot DTC P0133. lf DTC Pl 162, P1168 and/or P1169 are stored at the same time as DTC P1163, troubleshoot those
DTCS first, then recheck for DTC Pl163.
Possible Cause
o Primary HO2S (Sensor 'l) Deterioration
o Primary HO2S Heater (Sensor 1)Deterioration
. Exhaust system leakage
Troublsshooting Flowchart
tFol3al
I P1163
- The MIL has been reported on- DTC P0133 and/or Pl163* is
stored,
Problem Verilication:1. Do the ECM/PCM Reset Pro
cedure-2. Connect the scan tool
3. Start the engine. Hold the
engine at 3,000 rpm with no
load (in Park or neutral) until
the radiator fan comes on
4. Connect the SCS service con-
nector.5. Test-drive u nder Iollowing
conditions.- 55 mph (88 km/h) steadyspeed- A/f in D position {M/T in
5th gear)
Until readiness code comes
lntermittent failure, 3Y3tem i3 OK
at thi3 time. Ch.ck lol Poor con-
ncctions or loosc wiros at C123
{C145)! lPrimary HO2S, Sensor 1l
and ECM/PCM.
Replace th6 Prim.ry HO2S (Sen'
sor 11.
*: P'l163 (D16Y5 engine with M/T)
11-145

PGM-FI System
Itil-"w Heated Oxygen Sensor (primary HO2S) (sensor 1l(Dl6Y5 engine with M/Tl
The scan tool indicates Diagnostic Trouble Code (DTC) p1162: A malfunction in the primary Heated OxygenSensor (Primary HO2S) (Sensor 1) circutt.
Doscription
The Primary Heated orygen sensor (Primary Ho2s) {sensor 1) operates over a wide airlfuel range. The primary Ho2S(Sensor 1) is installed in the exhaust manifold.
SEI{SORELEMENT
SENSORTERMINALS
ECM CONNECTOR C (31PIPRIMARY HO2S(SENSOR 1)8PCONNECTOR {Clir5)
female terminalsof femaleterminals
NOTE: lf DTC Pl162 is stored at the same time as DTC Pl167, troubteshoot DTC p1162 first, then recheck for DTC p1167.
(To page 11-147)
- lh6 MIL hes b6on reDorted on.- DTCPl162 ir 3tored.
Problom v6rificationi1. Do the ECM Reset Procedure.2. Start the engine.3. Wait at least tlvo minutes.
Test drive tor several miles withthe transmission in 3rd gear. Holdthe engine speed at 1,500 rpm.
ls DTC P1162 indicatod?
Intermittent tailuro, systom is OKat this timo. Check tor poor con-nections or loose wires at C145(Plimr.y HO2S, Senso. t) andECM,
ls DTC P1162 indicated?
Chock for an open in the wire(lP+ lins):1. Turn the ignition switch OFF.2. Disconnect ECM connector C{31P) from the ECM.3. Disconnect the 8P connectorfrom the Primary HO2S {Sen-sor 1).4. Check for continuity betweenthe Primary HO2S (Sensor 1)8P connector terminal No. 7and ECM connector terminalc23.
Repair open in the wire betwaonECM (C231 end Prim.ry HO2Slsen3or l).
Inspect lor poor terminal to termi-nal contact at the Primary HO2Slsensor 'l I connoctor and ECM.It terminal contect is OK, roplacelh6 Primrry HO2S {Sensor 1}.
11-146

PGM-FI System
l:in1.".fy Heated Oxygen Sensor (primary HO2SI (sensor 1l(D16Y5 engine with M/D (cont'd)
The scan toor indicates Diagnosti" -Tl:y|* code (DTC) pl164: A range/performance probrem in the primaryHeated Oxygen Sensor (primary HO2S) (Sensor 1)circuit.
The scan tool indicates Diagnostic Trouble Code (DTC) p1165: AHeated Oxygen Sensor (primary HO2S) (sensor 1) circuit.
range/performance problem the pnmarv
The MIL has beon reponed on.DTC P1164 is stored.
Problem Verilication:1. Do the ECM Beset Procedure.2. Start the engine. Hold theengine at 3,000 rpm with noload (transmission in neutral)untilthe radiatorfan comes on.3. Connect the SCS service con-nector.4. Test-drive in 4th gear. Startingat 1,600 rpm, accelerate usingwide open throttle for at least 5seconds. Then decelerate tor atleast 5 seconds with the throttle completely closed.
Intgrmittent failure, syrtem b OKat this time. Check tor Door con-noctions or loose wires at C1a5(Primary HO2S. Senso.

andECM.
ls DTC Pl164 indicatedT
- The MIL has been reoorted on.- DTC P1165 is stored.
Intermittent l.iluro, system b OKat lhis time. Ch€ck tor poor con-noctions or loose wir6 at Ci45(Prioary HO2S, Sen3or 1l .ndECM.
ls DTC P1165 indicated?
Replace the P.imary HO2S (S6n-sor 11.
Problem Vo.ification:1. Do the ECM Reset Procedlre.2. Start the engine. Hotd theengine at 3,000 rpm with noload (transmission in neutral)until the radiator fan comes
3. Connect the SCS service con,nector.4. Test-drive u nder followingconditions.- 55 mph steady speedTransmission in 5th gearUntil readiness code comes
1 1-150