P23DB

Cylinder 3 Fuel Heater Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Problems starting the engine in cold weather
Unstable idling
Increased fuel consumption
Check Engine Light Illuminates
Reduced engine power

Causes

Cylinder 3 fuel heater malfunction
Open or short circuit in control circuit
Poor contact in the heater connector
Faulty relay or circuit fuse
Problems with the engine control unit (ECU)

How to Fix

Check the integrity of the fuel heater (resistance)
Inspect the wiring harness and connectors for damage.
Check voltage on control circuit
Replace faulty heater if necessary
Test and, if necessary, replace the engine control unit

Related codes

P23DA P23DC P23DD