P0174 is the Bank 2 equivalent of P0171. The engine's air-fuel mixture on Bank 2 has too much air or not enough fuel. The ECU detected that it cannot add enough fuel to maintain the correct 14.7:1 ratio, exceeding its positive fuel trim correction range.
DTC/P0174·Toyota
P0174 on Toyota: Causes, Symptoms and Fix Cost
Quick Answer
Moderate SeveritySafe to drive (short-term)Toyota
P0174 on a Toyota is the Bank 2 equivalent of P0171. The engine's air-fuel mixture on Bank 2 has too much air or not enough fuel. The ECU detected that it cannot add enough fuel to maintain the correct 14.7:1 ratio, exceeding its positive fuel trim correction range.
Repair cost on Toyota€30 - €700
What does P0174 mean on a Toyota?
Toyota Camry
2007-2024P0174 on the Camry only appears on the V6 (2GR-FE) since the 4-cylinder is single-bank. On the V6, Bank 2 intake manifold gaskets can develop vacuum leaks, especially on 2007-2011 models. The Bank 2 injectors are on the firewall side, making access harder.
What causes P0174 on a Toyota?
Beyond the generic causes listed on the main P0174 page, these are the Toyota-specific patterns we see most often:
Toyota CamryBank 2 intake manifold gasket vacuum leak on 2GR-FE V6
Toyota CamryBank 2 injectors harder to access (firewall side) delays diagnosis
How to diagnose P0174 on a Toyota with OBD2
Follow these steps to pinpoint the root cause of P0174:
- Check if P0171 is also present. Both codes together means a whole-engine cause (MAF, fuel pressure, large vacuum leak), not a Bank 2-specific issue
- Check short-term and long-term fuel trims on Bank 2 with a scan tool. LTFT above +15% confirms lean on that bank
- Perform a smoke test or spray method around Bank 2 intake manifold gaskets and vacuum hoses
- Inspect and clean the MAF sensor with dedicated MAF cleaner
- Check fuel pressure at the rail with a gauge against manufacturer specification
- Check for exhaust leaks before the Bank 2 upstream O2 sensor
How much does P0174 cost to fix on a Toyota? (EUR)
Estimated repair costs on a Toyota (Toyota costs align with the average for this code across makes).
Prices estimated as of May 2026. Costs vary by region, vehicle, and shop.
Related codes that often appear with P0174 on Toyota
These codes commonly cluster with P0174 on Toyota vehicles:
FAQ: P0174 on Toyota
What is the difference between P0171 and P0174?
Same problem, different engine banks. P0171 is Bank 1 (cylinder 1 side). P0174 is Bank 2. Four-cylinder engines only trigger P0171. P0174 appears on V6, V8, and boxer engines.
What does it mean if I have both P0171 and P0174?
Both banks lean simultaneously almost always points to a shared cause: dirty MAF sensor, low fuel pressure, failing fuel pump, or large vacuum leak on the intake manifold.
Can I drive with P0174?
Yes, for short distances. Avoid heavy load and high RPM. Lean conditions increase combustion temperatures, which can damage catalytic converters and exhaust valves. Fix within a couple of weeks.
How much does it cost to fix P0174?
From nearly free (cleaning MAF, replacing air filter, tightening a vacuum hose) to 300-500 euros for fuel pump or pressure regulator. Most common fixes are under 100 euros.
Looking for the full P0174 reference (all makes, full diagnosis flow, complete repair cost matrix)?
See the main P0174 guideSkanyx · Toyota
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