P0174 on a Toyota Camry
P0174 means system Too Lean (Bank 2). On the Camry, a few causes come up far more than others.
What P0174 usually means on a Camry
P0174 is the bank 2 counterpart to P0171 and only appears on V6 Camrys. It means the rear cylinder bank is running lean. When P0174 shows up alone, suspect something specific to that bank — a rear intake gasket, a cracked PCV line, or a lazy bank 2 air-fuel sensor. When it pairs with P0171, the cause is usually shared, like a dirty MAF or weak fuel pressure feeding both banks.
Most common causes on the Camry
- Bank 2 vacuum leak
A cracked rear PCV hose or leaking rear intake gasket leans only the firewall-side bank.
- Dirty MAF sensor (with P0171)
If both banks read lean, a contaminated MAF is the common denominator.
- Failing bank 2 AF sensor
The rear Denso sensor is original on many V6s and slows with age.
- Low fuel pressure
A weak pump pushes both banks lean under load, so check pressure if trims climb everywhere.
What P0174 costs to fix on a Camry
If P0174 stands alone, budget for chasing a rear-bank vacuum leak, which is fiddly because the hoses tuck behind the intake. A shared cause with P0171, like a MAF or fuel pump, is usually cheaper to pin down. Smoke-testing the intake is the fastest way in.
Year, engine and mileage change the answer. Start a case and Redline weighs these causes against what your car shows, then names the check that would settle it.
Other codes on the Toyota Camry
Related symptoms
Toyota Camry problems & recalls by year
Based on widely reported patterns for this model; individual causes vary by year, engine and history. Generic P0174 behavior is covered on the main P0174 page. Confirm with a scan tool before buying parts.
P0174 on your Camry?
Every problem becomes a Case. Tell Redline what your Camry is doing: it shows what the evidence supports, what’s still missing, and what to check next, before you approve a repair.
“Inner pad ~1 mm. Outer pad 3 mm.”
Next: check the slide pins move freely before buying parts.