Acura TSX / Honda Accord CL. Manual - part 590

DTC P0133: A/F SENSOR (SENSOR 1) RESPONSE MALFUNCTION/SLOW RESPONSE IN 
CIRCUIT 

1. Turn the ignition switch ON (II).  

2. Clear the DTC with the HDS.  

3. Start the engine. Hold the engine speed at 3,000 RPM with no load (in Park or neutral) until the radiator 

fan comes on, then let it idle.  

4. Test-drive under the following conditions: 

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Engine coolant temperature more than 158°F (70°C)  

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A/T in D position (M/T in 5th gear)  

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Vehicle speed at 30 MPH (48 km/h) or more, and engine speed between 1,000 and 3,000 RPM  

5. Check the AF FB AVG in the DATA LIST with the HDS. 

Is the value between 0.8-1.2? 

YES: Go to step 6.  

NO: Go to step 4 and recheck.  

6. Monitor the OBD STATUS for DTC P0133 in the DTCs MENU with the HDS. 

Does the screen indicate FAILED? 

YES: Go to step 7.  

NO: If the screen indicates PASSED, intermittent failure, system is OK at this time. If the 
screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates 
Out of CONDITION, go to step 2 and recheck.  

7. Turn the ignition switch OFF.  

8. Replace the A/F sensor (Sensor 1) (see A/F SENSOR REPLACEMENT ).  

9. Turn the ignition switch ON (II).  

10. Reset the ECM/PCM with the HDS.  

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

12. Start the engine. Hold the engine speed at 3,000 RPM with no load (in Park or neutral) until the radiator 

fan comes on, then let it idle.  

13. Test-drive under the following conditions: 

z

Engine coolant temperature more than 158°F (70°C)  

z

A/T in D position (M/T in 5th gear)  

z

Vehicle speed at 30 MPH (48 km/h) or more, and engine speed between 1,000 and 3,000 RPM  

14. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS. 

Are any Temporary DTCs or DTCs indicated? 

YES: If DTC P0133 is indicated, check for poor connections or loose terminals at the A/F 
sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or 
DTCs are indicated, go to the indicated DTC troubleshooting. 

NOTE:

If DTC P0139 is stored at the same time as DTC P0133, troubleshoot DTC P0139 
first, then recheck for DTC P0133.

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE PGM-FI System - TSX

  

 

NO: Go to step 15.  

15. Monitor the OBD STATUS for DTC P0133 in the DTCs MENU with the HDS. 

Does the screen indicates PASSED? 

YES: Troubleshooting is complete.  

NO: If the screen indicates FAILED, check for poor connections or loose terminals at the 
A/F sensor (Sensor 1) 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 12 and recheck.  

DTC P0134: A/F SENSOR (SENSOR 1) HEATER SYSTEM MALFUNCTION 

1. Turn the ignition switch ON (II).  

2. Clear the DTC with the HDS.  

3. Start the engine with no load (in Park or neutral) until the radiator fan comes on, then let it idle.  

4. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS. 

Is DTC P0134 indicated? 

YES: Go to step 5.  

NO: Intermittent failure, system is OK at this time. Check for poor connections or loose 
terminals at the A/F sensor (Sensor 1) and the ECM/PCM.  

5. Turn the ignition switch OFF.  

6. Replace the A/F sensor (Sensor 1) (see A/F SENSOR REPLACEMENT ).  

7. Turn the ignition switch ON (II).  

8. Reset the ECM/PCM with the HDS.  

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

10. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS. 

Are any Temporary DTCs or DTCs indicated? 

YES: If DTC P0134 is indicated, check for poor connections or loose terminals at the A/F 
sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or 
DTCs are indicated, go to the indicated DTC troubleshooting.  

NO: Go to step 12.  

11. Monitor the OBD STATUS for DTC P0134 in the DTCs MENU with the HDS. 

Does the screen indicate PASSED? 

YES: Troubleshooting is complete.  

NO: If the screen indicates FAILED, check for poor connections or loose terminals at the 
A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If the screen indicates NOT 
COMPLETED, go to step 8 and recheck.  

DTC P0135: A/F SENSOR (SENSOR 1) HEATER CIRCUIT MALFUNCTION 

NOTE:

If DTC P0135 is stored at the same time as DTC P0134, troubleshoot DTC P0135 
first, then recheck for DTC P0134.

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE PGM-FI System - TSX

  

 

1. Turn the ignition switch ON (II).  

2. Clear the DTC with the HDS.  

3. Start the engine. Hold the engine speed at 3,000 RPM with no load (in Park or neutral) until the radiator 

fan comes on, then let it idle.  

4. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS. 

Is DTC P0135 indicated? 

YES: Go to step 5.  

NO: Intermittent failure, system is OK at this time. Check for poor connections or loose 
terminals at the A/F sensor (Sensor 1) and the ECM/PCM.  

5. Turn the ignition switch OFF.  

6. Check the following fuses: 

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No. 19 OPTION (40A) fuse in under-hood fuse/relay box.  

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No. 4 A/F SENSOR (15A) fuse in under-dash fuse/relay box.  

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No. 23 IGP (7.5A) fuse in under-dash fuse/relay box. 

Are any of the fuses blown? 

YES: Repair short in the wire between the A/F sensor relay and the fuses, then go to 
step 23 .  

NO: Go to step 7.  

7. Disconnect the A/F sensor (Sensor 1) 4P connector.  

8. Measure resistance between A/F sensor (Sensor 1) 4P connector terminals No. 3 and No. 4. 

Is there 2.1-2.9 ohm at room temperature? 

YES: Go to step 9.  

NO: Go to step 22 .  

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE PGM-FI System - TSX

  

 

Fig. 18: Measuring Resistance Between A/F Sensor (Sensor 1) 4P Connector Terminals No. 3 
& No. 4 

9. Check for continuity between A/F sensor (Sensor 1) 4P connector terminal No. 1 and A/F sensor (Sensor 

1) 4P connector terminals No. 3 and No. 4 individually. 

Is there continuity? 

YES: Go to step 22 .  

NO: Go to step 10.  

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE PGM-FI System - TSX