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2001 Honda Accord DX
1998-2002 ENGINE PERFORMANCE PGM-FI System - Accord
DTC P0135: PRIMARY HO2S (SENSOR 1) HEATER CIRCUIT MALFUNCTION, DTC P0141:
SECONDARY HO2S (SENSOR 2) HEATER CIRCUIT MALFUNCTION
NOTE:
Information marked with an asterisk (*) applies to DTC P0141.
1. Reset the ECM/PCM (see HOW TO RESET THE ECM/PCM ).
2. Start the engine.
Is DTC P0135 or P0141 indicated?
YES - Go to step 3.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at
C204 (located under the right side of the dash), C101, C102 (located at the left side of the engine
compartment), the Primary HO2S (Sensor 1), the Secondary HO2S (Sensor 2), and the ECM/PCM.
3. Check the No. 6 ECU (ECM/PCM) CRUISE CONTROL (15A) fuse in the driver's under-dash fuse/relay
box.
Is the fuse OK?
YES - Go to step 4.
NO - Replace the fuse and retest.
4. Turn the ignition switch OFF.
5. Disconnect the HO2S (Primary or Secondary *) (Sensor 1 or Sensor 2 *) 4P connector.
6. At the HO2S side, measure resistance between HO2S 4P connector terminals No. 3 and No. 4.
sábado, 26 de enero de 2013 10:58:49
10:58:43 a.m.
Page 1
© 2011 Mitchell Repair Information Company, LLC.
2001 Honda Accord DX
1998-2002 ENGINE PERFORMANCE PGM-FI System - Accord
Fig. 34: Measuring Resistance Between HO2S 4P Connector Terminals No. 3 & No.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
sábado, 26 de enero de 2013 10:58:43 a.m.
Page 2
© 2011 Mitchell Repair Information Company, LLC.
2001 Honda Accord DX
1998-2002 ENGINE PERFORMANCE PGM-FI System - Accord
Is there 10-40 ohms (F23A4 SULEV engine: 2.0-20.0ohms
YES - Go to step 7.
NO - Replace the Primary HO2S (Sensor 1) or Secondary HO2S (Sensor 2) *.
7. Check for continuity between body ground and HO2S 4P connector terminals No. 3 and No. 4
individually.
Fig. 35: Checking For Continuity Between Body Ground & HO2S 4P Connector Terminals No. 3 &
No. 4
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES - Replace the HO2S (Primary or Secondary *) (Sensor 1 or Sensor 2 *).
NO - Go to step 8.
8. Turn the ignition switch ON (II).
sábado, 26 de enero de 2013 10:58:43 a.m.
Page 3
© 2011 Mitchell Repair Information Company, LLC.
2001 Honda Accord DX
1998-2002 ENGINE PERFORMANCE PGM-FI System - Accord
9. Measure voltage between HO2S 4P connector terminals No. 3 and No. 4.
Fig. 36: Measuring Voltage Between HO2S 4P Connector Terminals No. 3 & No. 4
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there battery voltage?
YES - Go to step 10.
NO - Go to step 13.
10. Turn the ignition switch OFF.
11. Disconnect ECM/PCM connector C (31P) (ECM/PCM connector A, 32P) *.
12. Check for continuity between ECM/PCM connector terminal C1 (A8) * and body ground.
sábado, 26 de enero de 2013 10:58:43 a.m.
Page 4
© 2011 Mitchell Repair Information Company, LLC.
2001 Honda Accord DX
1998-2002 ENGINE PERFORMANCE PGM-FI System - Accord
Fig. 37: Checking Continuity Between ECM/PCM Connector Terminal C1 (A8) & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES - Repair short in the wire between the ECM/PCM (C1, A8 * ) and the HO2S (Primary or
Secondary *) (Sensor 1, Sensor 2 *).
NO - Substitute a known-good ECM/PCM and recheck (see HOW TO SUBSTITUTE THE
ECM/PCM FOR TESTING PURPOSES ). If the symptom/indication goes away, replace the
original ECM/PCM.
13. Measure voltage between HO2S terminal No. 4 and body ground.
sábado, 26 de enero de 2013 10:58:43 a.m.
Page 5
© 2011 Mitchell Repair Information Company, LLC.
2001 Honda Accord DX
1998-2002 ENGINE PERFORMANCE PGM-FI System - Accord
Fig. 38: Measuring Voltage Between HO2S Terminal No. 4 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there battery voltage?
14.
15.
16.
17.
18.
YES - Go to step 14.
NO - Repair open in the wire between the No. 6 ECU (ECM/PCM) CRUISE CONTROL (15A)
fuse and the HO2S.
Turn the ignition switch OFF.
Reconnect the HO2S 4P connector.
Disconnect ECM/PCM connector C (31P) (ECM/PCM connector A, 32P) *.
Turn the ignition switch ON (II).
Measure voltage between ECM/PCM connector terminals B2 and C1 (A8) *.
sábado, 26 de enero de 2013 10:58:43 a.m.
Page 6
© 2011 Mitchell Repair Information Company, LLC.
2001 Honda Accord DX
1998-2002 ENGINE PERFORMANCE PGM-FI System - Accord
Fig. 39: Measuring Voltage Between ECM/PCM Connector Terminals B2 & C1 (A8)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there 0.1 V or less?
YES - Repair open in the wire between the ECM/PCM (C1, A8 * ) and the HO2S (Primary or
Secondary *) (Sensor 1, Sensor 2 *).
NO - Substitute a known-good ECM/PCM and recheck (see HOW TO SUBSTITUTE THE
ECM/PCM FOR TESTING PURPOSES ). If the symptom/indication goes away, replace the
sábado, 26 de enero de 2013 10:58:43 a.m.
Page 7
© 2011 Mitchell Repair Information Company, LLC.
2001 Honda Accord DX
1998-2002 ENGINE PERFORMANCE PGM-FI System - Accord
original ECM/PCM
sábado, 26 de enero de 2013 10:58:44 a.m.
Page 8
© 2011 Mitchell Repair Information Company, LLC.
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