P0172 Diagnostic Trouble Code Discussion for October 2019
Fuel System Rich (Bank 1)
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| Help Request | Posted | |
| 2002 Chevrolet Silverado 1500 LS 5.3L MIL Lamp on VIN: 1GCED19T52 P0172: Fuel Trim System Rich (Bank 1). 5.3 non flex fuel. Setting rich codes both banks are identical. Trims at idle are short -30 long -12. On throttle will drop then start to climb back up to the same. 02s will switch normally. Fuel pressure is good in spec at 60. Regulator is new and not... |
October 26, 2019 |
