2001 Honda Accord DX DTC P0135: PRIMARY HO2S (SENSOR 1) HEATER CIRCUIT MALFUNCTION, DTC P0141: SECONDARY HO2S (SENSOR 2) HEATER CIRCUIT MALFUNCTION
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1 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 P 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 :58:43 10:58:49 a.m. Page Mitchell Repair Information Company, LLC.
2 Fig. 34: Measuring Resistance Between HO2S 4P Connector Terminals No. 3 & No. sábado, 26 de enero de :58:43 a.m. Page Mitchell Repair Information Company, LLC.
3 Is there ohms (F23A4 SULEV engine: ohms 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 Is there continuity? YES - Replace the HO2S (Primary or Secondary *) (Sensor 1 or Sensor 2 *). NO - Go to step Turn the ignition switch ON (II). sábado, 26 de enero de :58:43 a.m. Page Mitchell Repair Information Company, LLC.
4 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 Is there battery voltage? YES - Go to step 10. NO - Go to step 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 :58:43 a.m. Page Mitchell Repair Information Company, LLC.
5 Fig. 37: Checking Continuity Between ECM/PCM Connector Terminal C1 (A8) & Body Ground 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 :58:43 a.m. Page Mitchell Repair Information Company, LLC.
6 Fig. 38: Measuring Voltage Between HO2S Terminal No. 4 & Body Ground Is there battery voltage? 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. 14. Turn the ignition switch OFF. 15. Reconnect the HO2S 4P connector. 16. Disconnect ECM/PCM connector C (31P) (ECM/PCM connector A, 32P) *. 17. Turn the ignition switch ON (II). 18. Measure voltage between ECM/PCM connector terminals B2 and C1 (A8) *. sábado, 26 de enero de :58:43 a.m. Page Mitchell Repair Information Company, LLC.
7 Fig. 39: Measuring Voltage Between ECM/PCM Connector Terminals B2 & C1 (A8) 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 :58:43 a.m. Page Mitchell Repair Information Company, LLC.
8 original ECM/PCM sábado, 26 de enero de :58:44 a.m. Page Mitchell Repair Information Company, LLC.
2005 Honda Civic DX. Information marked with an asterisk (*) applies to the D17A2 engine.
DTC P0135: PRIMARY HO2S (SENSOR 1) HEATER CIRCUIT MALFUNCTION NOTE: Information marked with an asterisk (*) applies to the D17A2 engine. 1. Reset the ECM/PCM (see HOW TO RESET THE ECM/PCM ). 2. Start the
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