Severity: Fix within days. Drive with caution and watch for new symptoms.
The engine is getting too much air or too little fuel on bank 2, the same lean condition as P0171 but on the other side of a V engine.
Clean the mass air flow sensor, check vacuum and PCV hoses, and check fuel pressure. If P0171 is also present, the cause is usually shared by both banks.
Same as P0171: hesitation, rough idle, and a risk of running hot. Get it checked soon.
You can drive short distances carefully; watch for worsening symptoms. Same as P0171: hesitation, rough idle, and a risk of running hot. Get it checked soon.
The most common causes are: Vacuum leak after the air-flow sensor; Dirty mass air flow sensor; Cracked vacuum or PCV hose; Weak fuel pump or clogged fuel filter; Failing oxygen sensor on bank 2; Exhaust leak before the first oxygen sensor. A scan tool and a visual check of the parts above is where a technician starts.
Clean the mass air flow sensor, check vacuum and PCV hoses, and check fuel pressure. If P0171 is also present, the cause is usually shared by both banks.
