P029A

Cylinder 1 - Fuel Trim at Max Limit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable engine operation
Power reduction
Increased fuel consumption
Misfire in cylinder 1

Causes

Malfunction of the fuel injector of cylinder 1
Vacuum leak in the area of cylinder 1
Dirty or faulty oxygen sensor
Problems with the air intake system
Malfunction of the mass air flow sensor (MAF)

How to Fix

Check the condition of the fuel injector of cylinder 1
Inspect for vacuum leaks
Check the operation of the oxygen sensor
Diagnose the air intake system
Check the readings of the mass air flow sensor (MAF)

Related codes

P0301 P0171 P0172