Exhaust Gas Recirculation Vent Control Circuit Low
The Recirculation Vent Control Circuit is reading a low voltage signal, indicating the EGR vent solenoid or its control circuit has an electrical fault. This prevents proper exhaust gas recirculation flow management, affecting emissions control and engine performance.
What You Might Notice
- Check engine light (CEL) illuminated
- Decreased engine power or reduced acceleration
- Rough or unstable idle
- Poor fuel economy
- Engine misfire-like symptoms or hesitation
Most Common Causes
- 1
Dirty or clogged EGR valve
Carbon buildup in the EGR valve restricts proper operation and can prevent the vent control solenoid from functioning correctly. This is one of the most common causes of this code.
- 2
EGR vent solenoid electrical fault
The solenoid may have failed, lost power, or have a weak electrical connection causing low voltage readings at the control circuit.
- 3
Wiring or connector issues
Corroded connections, loose wiring, or damaged harness between the PCM and EGR vent solenoid can cause low voltage signals.
- 4
PCM control circuit malfunction
The engine control module may have an internal fault in the circuit that controls the EGR vent solenoid, though this is less common than external component failures.
How to Diagnose It
- 1
Check Dirty or clogged EGR valve — Carbon buildup in the EGR valve restricts proper operation and can prevent the vent control solenoid from functioning correctly. This is one of the most common causes of this code.
- 2
Check EGR vent solenoid electrical fault — The solenoid may have failed, lost power, or have a weak electrical connection causing low voltage readings at the control circuit.
- 3
Check Wiring or connector issues — Corroded connections, loose wiring, or damaged harness between the PCM and EGR vent solenoid can cause low voltage signals.
- 4
Check PCM control circuit malfunction — The engine control module may have an internal fault in the circuit that controls the EGR vent solenoid, though this is less common than external component failures.
How to Fix It
- 1
Inspect and clean EGR valve and passages
Remove and inspect the EGR valve for carbon buildup. Clean or replace the valve and associated passages using appropriate carburetor cleaner or EGR cleaner. This restores proper valve operation.
- 2
Test and replace EGR vent solenoid
Use a multimeter to test the solenoid for proper resistance and continuity. If faulty, replace the solenoid with an OEM or quality equivalent part and retest.
- 3
Check and repair wiring and connectors
Inspect all wiring and connectors between the PCM and EGR vent solenoid for corrosion, damage, or loose connections. Clean corroded terminals and repair or replace damaged wiring as needed.
- 4
Diagnose PCM control circuit
If other components test normal, use advanced diagnostic equipment to check PCM output signals and internal circuitry. This may require professional-grade scanner and potentially PCM reprogramming or replacement.
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