P23D3

Cylinder 1 Fuel Heater Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Difficulty starting the engine in cold weather
Unstable engine operation
Increased fuel consumption
Check Engine Light Illuminates

Causes

Cylinder 1 fuel heater malfunction
Open or short circuit in wiring
Poor contact in connectors
Engine control module malfunction

How to Fix

Check the integrity of the fuel heater
Inspect wiring and connectors for damage
Check control circuit voltage
Replace fuel heater if necessary
Flash or replace the control module if necessary

Related codes

P23D0 P23D1 P23D2