 
				
	| 1994 Jeep Grand Cherokee SE 4.0L Hesitation, Poor Fuel Economy, MIL Lamp on Jeep has had mil light coming on for few months. After warm up only. OTC scanner shows low vacuum, lean-rich switches ok first few minutes of start up, even with engine warm. MIL light will come on at idle as well as driving after few minutes of running. Tried... 
                        
                            FIX posted 5/29/2004
                               
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 | Message Closed w/FIX 
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| VIN | 1J4GZ68S5R | 
| Engine | 4.0 L / 6 cyl / GAS | 
| Trans | 4-speed Automatic | 
| Delivery | FI / MFI | 
| Emissions | Federal | 
| Symptoms | Hesitation, Poor Fuel Economy, MIL Lamp On | 
| Occurs | Hot, Idle, Intermittently | 
Trouble Codes
| 21 | 02 sensor runs rich | 
Message Closed w/FIX
            
             Vehicle Data
 Vehicle Data
                1994 Jeep Grand Cherokee SE
| VIN | 1J4GZ68S5R | 
| Engine | 4.0 L / 6 cyl / GAS | 
| Trans | 4-speed Automatic | 
| Delivery | FI / MFI | 
| Emissions | Federal | 
| Symptoms | Hesitation, Poor Fuel Economy, MIL Lamp On | 
| Occurs | Hot, Idle, Intermittently | 
Trouble Codes
| 21 | 02 sensor runs rich | 
 9 Replies Received
9 Replies Received
 9 Replies Received
          9 Replies Received
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