01 The Scary Truth About Why Your Car Vibrates When You Accele… • 02 Unveiling the Power of Exhaust Brakes: Insights from an Exp… • 03 Top 7 Reasons Your Car Loses Power: Troubleshooting Common … • 04 Car Engine Overheating: Causes, Troubleshooting, Solutions,… • 05 What Causes the Check Engine Light to Come On? • 06 This is How to Calculate Your Car's Horsepower from RPM • 07 Why Your Car Shakes After Repairs and What It Really Means • 08 The Hidden Tech Inside Modern Cars Most Drivers Don’t Under… • 09 P0015 B Camshaft Position - Timing Over Retarded (Bank 1) • 10 Why disc and drum brakes are used in the front and rear res… •

DTC codes / P21xx · Fuel and air metering / P2144

P2144Exhaust Gas Recirculation Vent Control Circuit Low

P2144 indicates that the engine computer has detected a low-voltage condition on the exhaust gas recirculation (EGR) vent control circuit, which typically controls a solenoid or valve that vents EGR pressure. The computer expects a certain voltage range on the control wire and sees it persistently below the threshold, signaling a short to ground, an open circuit, or a faulty component.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaFuel and air metering

Symptoms you may notice

  • Illumination of the check engine light, often with no other noticeable symptoms
  • Rough idle or stalling, especially when the engine is cold
  • Poor fuel economy or increased emissions
  • Hesitation or stumble during acceleration
  • A noticeable decrease in engine power
  • In some cases, a sulfur or rotten egg smell from the exhaust

Common causes, most likely first

  1. Faulty EGR vent control solenoid or valve
  2. Damaged or disconnected wiring in the EGR vent control circuit
  3. Corroded or loose electrical connector at the solenoid or PCM
  4. Short to ground in the control circuit wiring
  5. Failed engine computer (PCM) driver for the circuit
  6. Vacuum leaks or blockages in the EGR system affecting vent operation

How to diagnose and fix it

  1. Use an OBD-II scanner to verify the code and check for related codes; clear the code and test-drive to see if it returns
  2. Visually inspect the EGR vent control solenoid, its connector, and the wiring harness for damage, corrosion, or loose pins
  3. Measure resistance of the solenoid with a multimeter and compare to manufacturer specifications
  4. Check for voltage on the control circuit with the key on and engine off; compare to expected values
  5. Test the control circuit for a short to ground using a multimeter and wiring diagram
  6. If the circuit and solenoid test good, suspect the PCM; perform a wiggle test on the harness while monitoring live data
  7. Replace the faulty solenoid, repair wiring, or reprogram/replace the PCM as needed, then clear codes and verify repair

Don't overlook the EGR vent solenoid

  • A stuck-open EGR valve can mimic a vent control circuit fault because the computer sees unexpected pressure changes and may set P2144 as a secondary code.
  • The vent control solenoid is often mistaken for the EGR control solenoid; they are separate components on many systems, and testing the wrong one leads to unnecessary parts replacement.
  • Intermittent wiring faults from chafed harnesses near hot exhaust components are a common cause that only appears when the engine is warm or vibrating.
  • A weak or failing battery or charging system can cause low-voltage codes like P2144 to set falsely, so always check system voltage first.
  • Some vehicles use a single solenoid for both vent and control functions; a failure inside the solenoid can set P2144 without any external wiring issue.

Can I keep driving with P2144?

You can generally continue driving with P2144, but avoid aggressive acceleration and long trips until diagnosed, as the fault may affect emissions and fuel economy. If the check engine light starts flashing or you notice severe drivability issues, stop driving and seek professional help.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage