P027F

Cold Start Fuel Injection Quantity A Higher Than Expected

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Poor engine starting when cold
Increased fuel consumption
Unstable engine idling
Black smoke from exhaust pipe when starting

Causes

Malfunction of fuel injectors (circuit A)
Dirty or damaged injectors
Problems with the coolant temperature sensor
Leaks in the fuel system
Malfunction of the engine control unit (ECU)

How to Fix

Check resistance and operation of circuit A injectors
Diagnose the coolant temperature sensor
Perform a leak test of the fuel system
Check the wiring harness to the injectors
If necessary, replace faulty components

Related codes

P0172 P0175 P0201