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what symptoms occur with dtc p1374 ?
this vehicle has MELTED 2 cats, no codes, or datstream abnormalites whatsoever. New plugs wires cat and rear o2. car came back, ran fine of course for a week, FINALLY p1374 ( no 3x reference from ign module recieved), this thing is idling fine, but missfire, b... Login to read more. ![]()
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| Engine | 3.4 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
2004 Chevrolet Impala 3.4L
| Engine | 3.4 L |
| Trans | 4-speed Automatic (Electronic) |

5 Replies Received
5 Replies Received