# P0204 — Generic Powertrain — Fuel & Air Metering — Injector Circuit

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

Source: https://clearthecode.com/codes/P0204

**System:** Powertrain · Fuel & Air Metering — Injector Circuit

**Severity:** moderate

## Description

Fuel injector circuit or injection timing fault. Check the indicated injector, its driver circuit, and fuel pressure.

## Diagnostic snapshot

- **Difficulty:** 6/10 — Intermediate diagnostics
- **Est. repair cost:** $120 – $450
- **Common symptoms:** Check engine light (MIL), Rough idle, Misfire or hesitation under load

## Diagnostic workflow

1. Confirm P0204 with a live scan — note pending vs stored and freeze frame data.
2. Verify reported symptoms: Check engine light (MIL), Rough idle, Misfire or hesitation under load.
3. Inspect wiring/connectors and related sensors before replacing modules.
4. Most likely fixes: Fuel injector / circuit testing (noid light, resistance, swap); Cylinder-specific misfire diagnosis (swap / compression / injector).
5. Clear codes and road-test; re-scan after two drive cycles if the monitor must set.

## Likely fixes

1. **Fuel injector / circuit testing (noid light, resistance, swap)** (moderate)
2. **Cylinder-specific misfire diagnosis (swap / compression / injector)** (moderate)