420A 99 420a emissions "Not Ready"

[timmytownsend88]

Well got my car running again saturday, when I went to get it inspected, I get evap system- not ready, oxygen sensor- not ready and oxygen heater circuit- not ready I have drove the car over 100 miles so far and I went to tag office and got a 10 day pass till it gets inspected. Does anyone know why im geting not ready??? I have no CEL at all.

 

[Kait]

Are your o2 sensors old?

 

[timmytownsend88]

i have replaced my front one about 7 months ago because it kept throwing the CEL on..

 

[Colt4G63 also]

Try following this drive cycle chart. You may need to do this more than once, and I personally prefer to change the five minutes in step three, to ten minutes. Step #6 has a typo though, it should read: "Decelerate without using the brake..."

OBD II Drive Cycle (reset car diagnostic monitors )

If it doesn't work, and you don't get any codes, unplug the ECU for ten minutes, then plug it back in and repeat the steps.

 

[timmytownsend88]

Thanks will give it a try

 

[Daniel b]

Thanks will give it a try

Did that ever end up working?

 

[BLACK'98DSM]

Did that ever end up working?

This thread is old and likely none of the original posters will reply to you. What issue are you having specifically?

 

[Daniel b]

This thread is old and likely none of the original posters will reply to you. What issue are you having specifically?

Same exact thing the first post was having

 

[dustyboner]

try:

Check engine light off, codes cleared; cold start.
-warm up engine 5 minutes (or until closed loop is reached--5 min is usually plenty)
-drive (w/ steady throttle) at a steady speed between 40 and 60 mph for 8 min
-stop and idle 3 min
-drive (w/ steady throttle) at a speed above 20 mph for 2 min
-turn key off, leave off 10 min

or

All Monitor Drive Trace
Pre-Conditioning Requirements:
– MIL must be off
– Cold start (Note: cold start temperature is undefined)
Driving Procedure
1) Warm engine up for five minutes (must reach closed loop)
2) Drive (with steady throttle) at a speed between 40 and 60 mph for 8 minutes.
3) Stop and idle for 3 minutes.
4) Drive (with steady throttle) at a speed above 20 mph for 2 minutes.
5) Turn key off, leave off for ten minutes (to run O2 sensor heater monitor).
Note: Due to the limited preconditions provided with this drive trace, NCVECS recommends using the monitor
specific drive traces for Chrysler vehicles.


Catalyst Monitor Drive Trace
Pre-Conditioning Requirements:
– MIL must be off.
– No DTCs present.
– Fuel level is between 15% and 85% full.
– ECT above 70º F.
– Engine must have run at least 90 seconds
– Engine between 1,350 & 1,900 rpm.
Driving Procedure
1) Idle vehicle for five minutes (to reach closed loop operation).
2) Drive with a steady vehicle speed between 30 and 45 mph for 2 minutes.


EGR System Monitor Drive Trace – Vacuum controlled
Pre-Conditioning Requirements:
– MIL must be off.
Driving Procedure
1) Idle vehicle for five minutes (to reach closed loop operation).
2) Drive with a steady vehicle speed between 40 & 60 mph for 8 minutes.


EGR System Monitor Drive Trace – Electronic
Pre-Conditioning Requirements:
– MIL must be off.
– MAP must be between 0-60 KPa.
– Engine speed between 500-850 rpm.
– ECT is above 180º F (90º C).
– No misfire temporary (pending) or matured fault present.
– A/C clutch, PS Switch and Cooling fans do not change state (turn off).
Driving Procedure
1) Idle vehicle for five (5) minutes (to reach closed loop operation).
2) Drive with a steady vehicle speed between 40 & 60 mph for 2 minutes.
3) Idle vehicle for three (3) minutes.
Note: This monitor evaluates EGR flow based on a change of engine roughness (idle stability).
Conditions causing un-stable idle will prevent this monitor from running.


Evaporative System Monitor Drive Trace
Trace 1: Standard Type
Pre-Conditioning Requirements:
– MIL must be off.
– No Evaporative DTCs present.
– Fuel level is between ½ and full.
(Note: monitor may still run with tank fill between 15% and 85%).
Driving Procedure
1) Idle vehicle for five minutes (to reach closed loop operation).
2) Drive with a steady vehicle speed between 30 and 45 mph for 2 minutes.
Trace 2: Leak Detection Pump
Pre-Conditioning Requirements:
– MIL must be off.
– No Evaporative DTCs present.
– Fuel level is between 30 & 85 % full.
Driving Procedure
1) Cold soak vehicle, start and idle vehicle for 4 minutes.
2) Drive in-town (stop and go) for 5 minutes, using smooth accelerations and decelerations.
3) Stop and idle vehicle for 4 minutes.


O2 Sensor Monitor Drive Trace
Pre-Conditioning Requirements:
– MIL must be off.
Driving Procedure
1) Idle vehicle for five minutes (to reach closed loop operation).
2) Drive with a steady vehicle speed above 25 mph for 2 minutes.
3) Stop and idle for 30 seconds.
4) Smoothly accelerate to a speed between 30 and 40 mph.
5) Repeat steps 3 & 4 five (5) times.


O2 Sensor Heater Monitor Drive Trace
Pre-Conditioning Requirements:
– MIL must be off.
Driving Procedure
1) Idle vehicle for five minutes (to reach closed loop operation).
2) Shut engine off and leave vehicle off for ten minutes.

​

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[Daniel b]

try:

Check engine light off, codes cleared; cold start.
-warm up engine 5 minutes (or until closed loop is reached--5 min is usually plenty)
-drive (w/ steady throttle) at a steady speed between 40 and 60 mph for 8 min
-stop and idle 3 min
-drive (w/ steady throttle) at a speed above 20 mph for 2 min
-turn key off, leave off 10 min

or

All Monitor Drive Trace
Pre-Conditioning Requirements:
– MIL must be off
– Cold start (Note: cold start temperature is undefined)
Driving Procedure
1) Warm engine up for five minutes (must reach closed loop)
2) Drive (with steady throttle) at a speed between 40 and 60 mph for 8 minutes.
3) Stop and idle for 3 minutes.
4) Drive (with steady throttle) at a speed above 20 mph for 2 minutes.
5) Turn key off, leave off for ten minutes (to run O2 sensor heater monitor).
Note: Due to the limited preconditions provided with this drive trace, NCVECS recommends using the monitor
specific drive traces for Chrysler vehicles.


Catalyst Monitor Drive Trace
Pre-Conditioning Requirements:
– MIL must be off.
– No DTCs present.
– Fuel level is between 15% and 85% full.
– ECT above 70º F.
– Engine must have run at least 90 seconds
– Engine between 1,350 & 1,900 rpm.
Driving Procedure
1) Idle vehicle for five minutes (to reach closed loop operation).
2) Drive with a steady vehicle speed between 30 and 45 mph for 2 minutes.


EGR System Monitor Drive Trace – Vacuum controlled
Pre-Conditioning Requirements:
– MIL must be off.
Driving Procedure
1) Idle vehicle for five minutes (to reach closed loop operation).
2) Drive with a steady vehicle speed between 40 & 60 mph for 8 minutes.


EGR System Monitor Drive Trace – Electronic
Pre-Conditioning Requirements:
– MIL must be off.
– MAP must be between 0-60 KPa.
– Engine speed between 500-850 rpm.
– ECT is above 180º F (90º C).
– No misfire temporary (pending) or matured fault present.
– A/C clutch, PS Switch and Cooling fans do not change state (turn off).
Driving Procedure
1) Idle vehicle for five (5) minutes (to reach closed loop operation).
2) Drive with a steady vehicle speed between 40 & 60 mph for 2 minutes.
3) Idle vehicle for three (3) minutes.
Note: This monitor evaluates EGR flow based on a change of engine roughness (idle stability).
Conditions causing un-stable idle will prevent this monitor from running.


Evaporative System Monitor Drive Trace
Trace 1: Standard Type
Pre-Conditioning Requirements:
– MIL must be off.
– No Evaporative DTCs present.
– Fuel level is between ½ and full.
(Note: monitor may still run with tank fill between 15% and 85%).
Driving Procedure
1) Idle vehicle for five minutes (to reach closed loop operation).
2) Drive with a steady vehicle speed between 30 and 45 mph for 2 minutes.
Trace 2: Leak Detection Pump
Pre-Conditioning Requirements:
– MIL must be off.
– No Evaporative DTCs present.
– Fuel level is between 30 & 85 % full.
Driving Procedure
1) Cold soak vehicle, start and idle vehicle for 4 minutes.
2) Drive in-town (stop and go) for 5 minutes, using smooth accelerations and decelerations.
3) Stop and idle vehicle for 4 minutes.


O2 Sensor Monitor Drive Trace
Pre-Conditioning Requirements:
– MIL must be off.
Driving Procedure
1) Idle vehicle for five minutes (to reach closed loop operation).
2) Drive with a steady vehicle speed above 25 mph for 2 minutes.
3) Stop and idle for 30 seconds.
4) Smoothly accelerate to a speed between 30 and 40 mph.
5) Repeat steps 3 & 4 five (5) times.


O2 Sensor Heater Monitor Drive Trace
Pre-Conditioning Requirements:
– MIL must be off.
Driving Procedure
1) Idle vehicle for five minutes (to reach closed loop operation).
2) Shut engine off and leave vehicle off for ten minutes.

​

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Not sure if this might tell you anything but I’m also getting evap leak and I did the drive cycle but still no o2 sensors showed.

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[Mello]

Is "ETC" engine temp coolant? It's showing 117°. When you scanned was your engine at operating temp? Is the coolant temp sensor working? System won't go into closed loop & cycle the O2 at cold temperatures & is programmed to run rich to help until warmed up.

 

[Daniel b]

Is "ETC" engine temp coolant? It's showing 117°. When you scanned was your engine at operating temp? Is the coolant temp sensor working? System won't go into closed open & cycle the O2 at cold temperatures & is programmed to run rich to help until warmed up.

Yeah not sure rhat was just a freeze frame when it started I think because that’s when the cel came on