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1990 Ford Ranger STX 4.0L Excessive Emissions, MIL Lamp on
This vehicle came to after 3 other shop worked on it , everybody put in o2 sensors & intermittently sets rich exhaust code 42 , dropped ecm & installed Break out Box, checked for poor o2 ground & all processor grounds with engine running all at 50 millivolts o...
FIX posted 1/20/2001
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| VIN | 1FTCR11X6L |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / efi |
| Symptoms | Excessive Emissions, MIL Lamp On |
| Occurs | Intermittently |
Trouble Codes
| 41 | system lean bank 1 KOEO |
| 42 | system rich bank 1 KOER |
Message Closed w/FIX
Vehicle Data
1990 Ford Ranger STX
| VIN | 1FTCR11X6L |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / efi |
| Symptoms | Excessive Emissions, MIL Lamp On |
| Occurs | Intermittently |
Trouble Codes
| 41 | system lean bank 1 KOEO |
| 42 | system rich bank 1 KOER |
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