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2003 Jeep Wrangler Rubicon 4.0L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on, Hard start & stall
This is my personal play toy. I use it for offroad so it is
modified, but no mods that I feel would trace back to this
issue. That is always my first on the check list, to rule
out any problems related to the last modification.
FIX posted 6/18/2012
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Related Documents & Media | VIN | 1J4FA69S23 |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Excessive Emissions, Poor Idle Quality, Hesitation, Cuts Out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on, Hard Start & Stall |
| Occurs | Always, on Decel, on Accel, Idle, Intermittently |
| Misc. | Heavily Modified for Off Road Use. No Major Mods That I Believe Could Relate Back to This Issue. |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/FIX
Vehicle Data
2003 Jeep Wrangler Rubicon
| VIN | 1J4FA69S23 |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Excessive Emissions, Poor Idle Quality, Hesitation, Cuts Out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on, Hard Start & Stall |
| Occurs | Always, on Decel, on Accel, Idle, Intermittently |
| Misc. | Heavily Modified for Off Road Use. No Major Mods That I Believe Could Relate Back to This Issue. |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
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