# P0174 — System Too Lean (Bank 2)

> ClearTheCode diagnostic code reference (not OEM service data).

Source: https://clearthecode.com/codes/P0174

**System:** Powertrain · Fuel & Air Metering

**Severity:** moderate

## Description

Lean condition on Bank 2. Same likely causes as P0171 but isolated to Bank 2 — check that bank's specific intake plumbing, oxygen sensor, and injectors.

## Diagnostic snapshot

- **Difficulty:** 6/10 — Intermediate diagnostics
- **Est. repair cost:** $120 – $450

## Diagnostic workflow

1. Confirm P0174 with a live scan — note pending vs stored and freeze frame data.
2. Inspect wiring/connectors and related sensors before replacing modules.
3. Clear codes and road-test; re-scan after two drive cycles if the monitor must set.