P0172 Diagnostic Trouble Code Discussion for October 2024
Fuel System Rich (Bank 1)
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| Help Request | Posted | |
| 2008 Dodge Grand Caravan SXT 3.8L Excessive Emissions, MIL Lamp on VIN: 2D8HN54P08 P0172: Rich. ... is running rich, and setting code P0172. The total fuel trims are 30% to 40% negative at all running conditions. I have plugged the purge valve with no change. The oxygen up and down stream sensors match. The engine runs worse when a vacuum leak is in... |
October 18, 2024 | |
| 2008 Dodge Grand Caravan SXT 3.8L Excessive Emissions, MIL Lamp on VIN: 2D8HN54P08 P0172: Rich. ... is running rich, and setting code P0172. The total fuel trims are 30% to 40% negative at all running conditions. I have plugged the purge valve with no change. The oxygen up and down stream sensors match. The engine runs worse when a vacuum leak is in... |
October 28, 2024 | |
| 2000 GMC W4500 Forward W4S042 5.7L MIL Lamp on VIN: 4KDC4B1R2Y P0172: System rich bank 1. ... engine light on with code P0172. When I reviewed fuel trim data, I found the fuel trims combined around negative 20% at idle and around negative 35% at cruise. I found the fuel pressure good, the vacuum around 20inHg... |
October 29, 2024 |
