2014 Honda Civic LX, mileages: 25K, Location: New York

I am new to this, please take it easy with me.

I recently replaced my car battery due to a completely dead battery, and shortly after the battery replacement my civic was due for an annual inspection.(I know, very poor time management on my part.) So emission readiness failed with FOUR incompletes (Catalyst, O2 Sensor, EGR and Evaporative), I was told to drive the car on highway speed for at least 100 miles for the car to pick up these monitors. Three weeks and 400+ miles later, EGR and Evaporative became ready, but Catalyst and O2 sensor remained NOT ready. During these time, I went to three different service stations, including one Honda dealership service center, everyone of them told me the same thing: "Keep driving". Somebody please advise what else I can do to result this issue.

Other information might be useful:
- no Check Engine Lights
- no error codes on ODB2 scanner
- i did tried to perform "drive cycle" whenever possible. (from cold start, idle for 2 min with both front and rear defroster on, turn off defroster, get on highway keep speed between 50-60 mph for as long as possible, coast whenever possible with foot off the accelerator, city driving for 10 minutes, etc.)
- "O2 Senor Heater" is showing "complete"
- checked physical oxygen sensor cables(both upstream and downstream o2 sensors), no noticeable damages

For some reason, i am not able to upload any attachments.
From ODB2 scanner live data:
O2S11(mA): ~0.03 at idle and fluctuate from -1.0 to 0.3 while stepping on the gas pedal
EQ_RAT11 : ~0.989 at idle (consistent around 1.0 when stepping on gas, goes to 1.999 for split seconds when quickly release gas pedal)
02S12(V) : ~0.545 at idle (consistent between 0.55 to 0.60 when steadily stepping on gas pedal, goes down to 0.1 when gas pedal was released)
EQ_RAT: ~0.985 at idle (similar behavior as EQ_RAT11 above)

Please let me know what other information is needed to assist with troubleshooting.

Thank you very much for any inputs.

 

How to Set Readiness Codes

Malfunction Indicator Lamp (MIL) Indication (In relation to Readiness Codes)
The vehicle has certain readiness codes that are part of the on-board diagnostics for the emissions systems. If the vehicle's battery has been disconnected or gone dead, if DTCs have been cleared, or if the ECM/PCM has been reset, these readiness codes are reset to incomplete. In some states, part of the emissions testing is to make sure these codes are set to complete. If all of them are not set to complete, the vehicle may fail the emission test, or the test cannot be finished.

To check if the readiness codes are set to complete, turn the ignition switch to ON (II), but do not start the engine. The MIL comes on for 15－20 seconds. If it then goes off, the readiness codes are set to complete. If it flashes five times, one or more readiness codes are not set to complete. To set readiness codes from incomplete to complete, do the procedure for the appropriate code.

To check the status of a specific DTC system, check the OBD status in the DTC MENU with the HDS. This screen displays the DTC, the current data list of the enable criteria, and the status of the readiness testing.

Catalytic Converter Monitor and Readiness Code
NOTE:

• During the procedure, do not turn the ignition switch to ACC (I) or LOCK (0).
• All readiness codes are cleared when the battery is disconnected, if DTCs have been cleared, or if the ECM/PCM is reset with the HDS.
• Low ambient temperatures or excessive stop-and-go traffic may increase the drive time needed to switch the readiness code from incomplete to complete.
• The readiness code will not switch to complete until all the enable criteria are met.
• If a fault in the secondary HO2S system caused the MIL to come on, the readiness code cannot be set to complete until you correct the fault.

Enable Criteria

• ECT SENSOR 1 at 158 °F (70 °C) or more.
• IAT SENSOR at 20 °F (-7 °C) or more.
• Vehicle speed above 25 mph (40 km/h).

Procedure
1. Connect the HDS to the vehicle's data link connector (DLC), and bring up the READINESS CODEs screen for Catalyst in the DTCs MENU.
2. Start the engine.
3. Test-drive the vehicle under stop-and-go conditions with short periods of steady cruise. After about 5 miles (8 km), the readiness code should switch to complete.
4. If the readiness code is still not set to complete, check for a Pending DTC with the HDS. If there is no DTC, one or more of the enable criteria were probably not met; repeat the procedure.

Air Fuel Ratio (A/F) Sensor Monitor and Readiness Code
NOTE:
During the procedure, do not turn the ignition switch to ACC (I) or LOCK (0).
All readiness codes are cleared when the battery is disconnected, if DTCs have been cleared, or if the ECM/PCM is reset with the HDS.

Enable Criteria
ECT SENSOR 1 at 140 °F (60 °C) or more.

Procedure

1. Start the engine.
2. Test-drive the vehicle under stop-and-go conditions with short periods of steady cruise. During the drive, decelerate (with the throttle fully closed) for 5 seconds. After about 3.5 miles (5.6 km), the readiness code should switch from incomplete to complete.
3. Check the readiness codes screen for the AIR FUEL RATIO (A/F) SENSOR in the DTCs MENU with the HDS.

• If the screen shows complete, readiness is complete.
• If the screen shows not complete, go to the next step.

4. Check for a Pending DTC. If there is no DTC, the enable criteria was probably not met. Select the DATA LIST MENU. Check ECT SENSOR 1 in the ALL DATA LIST with the HDS. If ECT SENSOR 1 is less than 140 °F (60 °C), run the engine until it is more than 140 °F (60 °C), then repeat the procedure.

Air Fuel Ratio (A/F) Sensor Heater Monitor Readiness Code
NOTE: All readiness codes are cleared when the battery is disconnected, if DTCs have been cleared, or if the ECM/PCM is reset with the HDS.

Procedure
1. Start the engine, and let it idle for 1 minute. The readiness code should switch from incomplete to complete.
2. If the readiness code is still not set to complete, check for a Pending DTC. If there is no DTC, repeat the procedure.

 

thanks for the information. I had performed above mentioned procedures and met all enable criteria, but O2 sensor monitor remained "not ready". In fact one of employee at the service station commented that it's very strange that I got Evaporation system ready before oxygen, since that's the one most people are having trouble with.

 

I'm having the same problem with my 2015 Honda Civic. Knock Sensor failed in June this year, and I got it replaced by our mechanic after concluding I would need a five jointed arm to reach it myself. Afterwards, I reset the DTC [P0328]. There are eight Monitors which must complete successfully before the car achieves 'Ready for Emissions Testing' status. The three continuous tests: 'Misfire, Fuel System, and Comprehensive Component' were successfully completed quickly. The tests for 'Catalyst, Oxygen Sensor Heater, and EGR' were completed with about 30 warmups and about 100 miles of driving after resetting the DTCs. The remaining two 'EVAP System and Oxygen Sensors' were not completed. After almost 300 miles and almost 50 warmups, the EVAP System completed successfully.
It is now approaching 500 miles and almost 70 warmups and the 'Oxygen Sensors' test are still reported at 'not completed'. There are and have been no DTC's (Pending, Active, or Permanent) since the new knock sensor was installed. All of the ECM readings related to the two Oxygen Sensors are between the minimum and maximum values indicated in the Diagnostic Report. I have done several 'Drive Cycles', but I haven't been able to identify the 'Enable Criteria' for this, so I'm still clueless as to what to do next. Though I've already paid the car's DMV registration fees, I can't complete the registration renewal until I can get the car successfully smog tested, which is impossible if the car's status is 'Not ready for emissions testing.' Does anyone know the 'Enable Criteria' for this car's Oxygen Sensors?

 

Hey, were you able to solve this problem if so what did you do if you remember, im having this exact same problem

 

Yes, I was able to solve this problem.
This is a bit embarrassing, but the answer was in the owners manual, and I have copied it below. (The italicized comments were added by me to clarify where I thought was needed.

"If you are required to have your vehicle tested before the readiness codes are set, prepare the vehicle for retesting by doing the following:I followed this exactly, finding almost empty freeways here in Los Angeles at 4:00 AM I had already done much like this, but it only took doing it correctly once to get the car to achieve "ready for testing" status.
Good luck!

 

Aaah thanks man thats gives me more confident about it, i just found this yesterday on the manual as well, and i been waiting till i have time to try it, maybe this weekend, my problem is that i live in PA AND RIGHT now all weather is below freezing everyday, which kindda sucks bc it says the temp needs to be 40 f and above, but thank you very much for rectifying and doubling down on my doubt lol. I hope this finds other people who are having the same problem

 

Good luck! I had been SO SURE that I must have accomplished the reqirements with overkill in the hundreds of miles I had driven. I thought I understood what the technical functions were to fullfil the 'ready for testing' condition. After subsequent reflection, I realized I was thinking the car's engine control computer was a lot 'smarter' and more sophisticated than it had any reason to be. As a 2015 model, the hardware and software was probably essentially at a technological 'state of the art' for 2005 or even earlier. It actually is pretty 'dumb'!