P2D18

Exhaust Flow Control Valve C Position Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Increased fuel consumption
Reduced engine power
Unstable engine operation at idle
Check Engine light comes on
Increased emissions of harmful substances

Causes

Exhaust gas flow control valve C malfunction
Open or short circuit in valve circuit
Problems with the engine control unit (ECU)
Valve dirty or stuck
Wiring harness damage

How to Fix

Check the condition of the exhaust gas flow control valve C
Check continuity of circuit and connectors
Check signal parameters using an OBD-II scanner
Replace a faulty valve or repair a circuit
Clean or replace dirty valve

Related codes

P2D17 P2D19 P2D1A