P174F on Skoda
Fuel Trim Cylinder Balance Bank 2
P174F on Skoda vehicles indicates fuel trim cylinder balance bank 2. Au7o has documented this code across 1 Skoda model — most commonly on Octavia. This is a manufacturer-specific fuel-system code (used by some makes, notably BMW) indicating a fuel trim cylinder balance problem on Bank 2 — the bank of cylinders that does not contain cylinder 1. The engine computer compares how much fuel correction each cylinder needs and sets this code when one or more cylinders on Bank 2 run noticeably richer or leaner than the others, creating an air/fuel imbalance. It generally points to something disturbing fueling or air on individual cylinders rather than the whole bank. Symptoms can include rough idle, slight misfire feel, and reduced smoothness. Typical repair costs on Skoda range from $800 to $4,000, depending on the specific model and root cause.
Common Causes of P174F
- •Dirty, clogged, or leaking fuel injector on a Bank 2 cylinder
- •Intake or vacuum leak affecting individual cylinders
- •Weak or fouled spark plug / ignition coil causing imbalance
- •Low or uneven fuel pressure
- •Faulty oxygen/air-fuel sensor on Bank 2
- •Carbon buildup on intake valves (direct-injection engines)
- •Compression or valve issue on a Bank 2 cylinder
P174F on Skoda by Model
Skoda Octavia(1 issue)
- DSG (DQ200/DQ250) Mechatronic Unit Failure2008-2018
Mk2 and Mk3 Octavias with the 7-speed dry-clutch DQ200 (small engines) or 6-speed wet-clutch DQ250 (larger engines) DSG transmissions suffer mechatronic unit failure. DQ200 is the more failure-prone unit — the mechatronic unit's circuit board has known electronic and bridge-seal issues. Symptoms include juddering, refusal to shift, kangaroo-style jerking at low speeds, and intermittent neutral. Same defect affects all VW Group DSG vehicles. Multiple class actions in EU and Australia.
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View P174F across all makes →Frequently Asked Questions
What does P174F mean on Skoda?▼
P174F stands for "Fuel Trim Cylinder Balance Bank 2." This is a manufacturer-specific fuel-system code (used by some makes, notably BMW) indicating a fuel trim cylinder balance problem on Bank 2 — the bank of cylinders that does not contain cylinder 1. The engine computer compares how much fuel correction each cylinder needs and sets this code when one or more cylinders on Bank 2 run noticeably richer or leaner than the others, creating an air/fuel imbalance. It generally points to something disturbing fueling or air on individual cylinders rather than the whole bank. Symptoms can include rough idle, slight misfire feel, and reduced smoothness. On Skoda specifically, this code is documented across 1 model.
What causes P174F on Skoda vehicles?▼
Common causes on Skoda: Dirty, clogged, or leaking fuel injector on a Bank 2 cylinder, Intake or vacuum leak affecting individual cylinders, Weak or fouled spark plug / ignition coil causing imbalance, Low or uneven fuel pressure, Faulty oxygen/air-fuel sensor on Bank 2. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P174F on a Skoda?▼
Repair costs on Skoda range from $800 to $4,000, depending on the specific model and root cause.
Which Skoda models have P174F documented?▼
Au7o has documented P174F on 1 Skoda model: Octavia.