P026D

Fuel Injection Quantity A Higher Than Expected

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Increased fuel consumption
Unstable engine operation
Power Loss
Black smoke from the exhaust pipe

Causes

Fuel injector malfunction
Fuel leak
Contamination or damage to the mass air flow sensor (MAF)
Problems with the absolute pressure (MAP) sensor
Malfunction of the fuel pump or pressure regulator

How to Fix

Check fuel injectors for leaks and performance
Inspect the fuel system for leaks
Check the MAF and MAP readings
Test the fuel pressure in the system
Clean or replace faulty sensors or components

Related codes

P0172 P0175 P0300