What are the common causes of P02A7?

A leaking or clogged cylinder 4 fuel injector. Too high fuel pressure. A faulty or dirty mass air flow sensor. A faulty intake air or coolant temperature sensor. A faulty oxygen sensor reading rich.

Read the long and short term fuel trim on a scan tool. Run a fuel system leak down test on cylinder 4. Check fuel pressure and the pressure regulator. Test the mass air flow, intake air and coolant temperature sensors. Replace injector 4 if it leaks down. Clear the code and retest.

P02A7

Cylinder 4 - Fuel Trim at Min Limit

System: Injector circuits (P code)
Lamp: Check Engine Light
Category: Powertrain - Fuel/Air Metering

What it means

P02A7 means Cylinder 4 - Fuel Trim at Min Limit.

Check these first

A leaking or clogged cylinder 4 fuel injector
Too high fuel pressure
A faulty or dirty mass air flow sensor
A faulty intake air or coolant temperature sensor
A faulty oxygen sensor reading rich

What to do next

Read the long and short term fuel trim on a scan tool
Run a fuel system leak down test on cylinder 4
Check fuel pressure and the pressure regulator
Test the mass air flow, intake air and coolant temperature sensors
Replace injector 4 if it leaks down
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.