P1840
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Manufacturer Specific Definitions for P1840
| Make | Fault Location |
|---|---|
| Buick | Internal Mode Switch 'S' Circuit Low Voltage |
| Cadillac | Internal Mode Switch 'S' Circuit Low Voltage |
| Chevrolet | Internal Mode Switch 'S' Circuit Low Voltage |
| Citroen | Transmission Transfer Case Shift Motor Short Circuit To Battery |
| Daewoo | Eds 3 Drv Crct Batt Short |
| Ford | Transmission Transfer Case Shift Motor Short Circuit To Battery |
| Gm | Internal Mode Switch 'S' Circuit Low Voltage |
| Kenworth | P1840 - Upstream NOx sensor AT1IGC1 low rate fault |
| Lincoln | Transmission Transfer Case Shift Motor Short Circuit To Battery |
| Mercury | Transmission Transfer Case Shift Motor Short Circuit To Battery |
| Peterbilt | P1840 - Upstream NOx sensor AT1IGC1 low rate fault |
| Peugeot | Transmission Transfer Case Shift Motor Short Circuit To Battery |
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