
1996 Jeep Cherokee Classic 4.0L Excessive Emissions
Intermittently the upstream O2 sensor shows a full rich condition and the post cat sensor follows suit, Checked the following with scanner and fuel pressure gauge attached, Map sensor OK, Fuel pressure OK, Coolant temp OK, No obvious vacuum leaks or exhaust le...
FIX posted 2/14/2011
![]()
iATN Members:
Login to view full TechHelp request Auto Repair Pros: Join iATN to read this TechHelp request Vehicle Owners: Find a nearby iATN member to repair your vehicle (View Replies)3 Replies Received(Hide Replies)3 Replies Received
|
Message Closed w/FIX
|
VIN | 1J4FJ78SXT |
Engine | 4.0 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | Fuel Injection |
Emissions | OBD-II Compliant |
Symptoms | Excessive Emissions |
Occurs | Intermittently |
Trouble Codes
P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/FIX
Vehicle Data
1996 Jeep Cherokee Classic
VIN | 1J4FJ78SXT |
Engine | 4.0 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | Fuel Injection |
Emissions | OBD-II Compliant |
Symptoms | Excessive Emissions |
Occurs | Intermittently |
Trouble Codes
P0420 | Catalyst Efficiency Below Threshold (Bank 1) |