Honda Element. Manual - part 666

YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the 
ECM/PCM, then go to step 1. 

NO -Go to step 22. 

22. Monitor the OBD STATUS for DTC P0137 in the DTCs MENU with the HDS. 

Does the screen indicate PASSED?  

YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 21, go 
to the INDICATED DTCS TROUBLESHOOTING. 

NO -If the screen indicates FAILED, check for poor connections or loose terminals at the secondary 
HO2S (Sensor 2) and the ECM/PCM, then go to step 1. If the screen indicates EXECUTING, keep 
driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 19. 

23. Reconnect all connectors.  

24. Update the ECM/PCM if it does not have the latest software (see UPDATING THE ECM/PCM ), or 

substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ).  

25. Start the engine, and let it idle without load (in Park or neutral) until the radiator fan comes on.  

26. Test-drive under these conditions: 



Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C)  



A/T in D position (M/T in 4th gear)  



Engine speed at 1,500-3,000 rpm  



Drive 1 minute or more  

27. Check for Temporary DTCs or DTCs with the HDS. 

Is DTC P0137 indicated?  

YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the 
ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see SUBSTITUTING 
THE ECM/PCM ), then go to step 25. If the ECM/PCM was substituted, go to step 1. 

NO -Go to step 28. 

28. Monitor the OBD STATUS for DTC P0137 in the DTCs MENU with the HDS. 

Does the screen indicate PASSED?  

YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, 
replace the original ECM/PCM (see ECM/PCM REPLACEMENT ). If any other Temporary DTCs or 
DTCs were indicated in step 27, go to the INDICATED DTCS TROUBLESHOOTING. 

NO -If the screen indicates FAILED, check for poor connections or loose terminals at the secondary 
HO2S (Sensor 2) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good 

 

2007 Honda Element EX 

2007-2008 ENGINE PERFORMANCE PGM-FI System - Element

  

ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then go to step 25. If the ECM/PCM was 
substituted, go to step 1. If the screen indicates EXECUTING, keep driving until a result comes on. If the 
screen indicates OUT OF CONDITION, go to step 25. 

DTC P0138: SECONDARY HO2S (SENSOR 2) CIRCUIT HIGH VOLTAGE 

1. Turn the ignition switch ON (II).  

2. Clear the DTC with the HDS.  

3. Start the engine, and let it idle without load (in Park or neutral) until the radiator fan comes on.  

4. Check the HO2S S2 in the DATA LIST with the HDS. 

Does the voltage stay at 1.27 V or more?  

YES -Go to step 5. 

NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at 
the secondary HO2S (Sensor 2) and the ECM/PCM. 

5. Turn the ignition switch OFF.  

6. Disconnect the secondary HO2S (Sensor 2) 4P connector.  

7. Connect secondary HO2S (Sensor 2) 4P connector terminals No. 1 and No. 2 with a jumper wire. 

Fig. 43: Connecting Secondary HO2S (Sensor 2) 4P Connector Terminals No. 1 And No. 2 With 
Jumper Wire 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

8. Turn the ignition switch ON (II).  

9. Check the HO2S S2 in the DATA LIST with the HDS. 

Does the voltage stay at 1.27 V or more?

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot, and 
review the general troubleshooting information (see GENERAL 
TROUBLESHOOTING INFORMATION ).

 

2007 Honda Element EX 

2007-2008 ENGINE PERFORMANCE PGM-FI System - Element

  

YES -Go to step 10. 

NO -Go to step 19. 

10. Turn the ignition switch OFF.  

11. Remove the jumper wire from the secondary HO2S (Sensor 2) 4P connector.  

12. Connect secondary HO2S (Sensor 2) 4P connector terminal No. 2 to body ground with a jumper wire. 

Fig. 44: Connecting Secondary HO2S (Sensor 2) 4P Connector Terminal No. 2 To Body Ground 
With Jumper Wire 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

13. Turn the ignition switch ON (II).  

14. Check the HO2S S2 in the DATA LIST with the HDS. 

Does the voltage stay at 1.27 V or more?  

YES -Go to step 15. 

NO -Repair open in the wire between the ECM/PCM (E4) and the secondary HO2S (Sensor 2), then go to 
step 21. 

15. Turn the ignition switch OFF.  

16. Jump the SCS line with the HDS.  

17. Disconnect ECM/PCM connector E (31P).  

18. Check for continuity between ECM/PCM connector terminal E20 and body ground. 

 

2007 Honda Element EX 

2007-2008 ENGINE PERFORMANCE PGM-FI System - Element

  

Fig. 45: Checking Continuity Between ECM/PCM Connector Terminal E20 And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES -Go to step 29. 

NO -Repair open in the wire between the ECM/PCM (E20) and the secondary HO2S (Sensor 2), then go 
to step 21. 

19. Turn the ignition switch OFF.  

20. Replace the secondary HO2S (Sensor 2) (see A/F SENSOR REPLACEMENT ).  

21. Reconnect all connectors.  

22. Turn the ignition switch ON (II).  

23. Reset the ECM/PCM with the HDS.  

24. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).  

25. Start the engine, and let it idle without load (in Park or neutral) until the radiator fan comes on.  

26. Test-drive under these conditions: 



Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C)  



A/T in D position (M/T in 4th gear)  



Engine speed at 1,500-3,000 rpm  



Drive 1 minute or more  

27. Check for Temporary DTCs or DTCs with the HDS. 

Is DTC P0138 indicated?  

YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the 
ECM/PCM, then go step 1. 

NO -Go to step 28. 

28. Monitor the OBD STATUS for DTC P0138 in the DTCs MENU with the HDS. 

 

2007 Honda Element EX 

2007-2008 ENGINE PERFORMANCE PGM-FI System - Element