P029B

Cylinder 1 - Fuel Trim at Min Limit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable engine idling
Power Loss
Increased fuel consumption
Detonation (engine knocking)

Causes

Dirty or faulty fuel injector of cylinder 1
Vacuum leak in the intake tract
Malfunction of the mass air flow sensor (mass air flow sensor)
Intake manifold leaking
Problems with the fuel pump or fuel pressure regulator

How to Fix

Check the fuel injector of cylinder 1 for contamination and performance.
Inspect the intake tract for vacuum leaks
Check the MAF readings and replace if necessary
Check the intake manifold for leaks
Check the fuel pressure in the system

Related codes

P0171 P0172 P0301