P0172 Code Fix? Here’s the Exact Fix (Step-by-Step) Symptoms: Rough idle Black exhaust smoke Decreased fuel efficiency Tools Needed: DiagtPro X400 Scanner Multimeter Vacuum gauge Step 1: Test Fuel Trim

P0172 Code Fix? Here’s the Exact Fix (Step-by-Step) Symptoms: Rough idle and stumbling engine Black exhaust smoke indicating excessive fuel consumption Reduced fuel efficiency and performance Illuminated Check Engine Light

P0172 Code Fix? Here’s the Exact Fix (Step-by-Step) Symptoms: Rough idle Black exhaust smoke Decreased fuel efficiency Engine light on (code P0172: System Too Rich – Bank 1) Tools Needed:

P0172 Code Fix? Here’s the Exact Fix (Step-by-Step) Symptoms: Rough idle and decreased fuel efficiency Black exhaust smoke from the tailpipe Check Engine Light (CEL) illuminated on the dashboard Tools

P0172 Code Fix? Here’s the Exact Fix (Step-by-Step) Symptoms: Rough idle and decreased fuel efficiency Black exhaust smoke or soot from the tailpipe Check Engine Light (CEL) illuminated on the

P0172 Code Fix? Here’s the Exact Fix (Step-by-Step) Symptoms: Rough idle Black exhaust smoke Decreased fuel efficiency Tools Needed: DiagtPro X400 Scanner Multimeter Vacuum gauge Step 1: Test Fuel Trims

P0172 Code Fix? Here’s the Exact Fix (Step-by-Step) Symptoms: Rough idle Black exhaust smoke Decreased fuel efficiency Tools Needed: DiagtPro X400 Scanner Multimeter Vacuum gauge Step 1: Test Fuel Trim

P0172 Code Fix? Here’s the Exact Fix (Step-by-Step) Symptoms: Rough idle and decreased fuel efficiency Black exhaust smoke or soot Illuminated check engine light with P0172 code Tools Needed: DiagtPro

P0172 Code Fix? Here’s the Exact Fix (Step-by-Step) Symptoms: Rough idle and decreased fuel efficiency Black exhaust smoke or soot Engine light on with P0172 code (Bank 1 too rich)

P0172 Code Fix? Here’s the Exact Fix (Step-by-Step) Symptoms: Rough idle and decreased fuel efficiency Black exhaust smoke due to excessive fuel consumption Illuminated "Check Engine" light with code P0172