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What is EGR valve pintle position circuit?

What is EGR valve pintle position circuit?

Tech notes. The P1406 code means that the EGR valve is 10% of the expected position by the Powertrain Control Module (PCM), usually caused by carbon built up n the EGR valve. Start by cleaning the EGR valve.

Where is the EGR valve located?

The EGR valve is usually located near or attached to the intake manifold, with a tube running to the exhaust manifold. There should also be a vacuum or electrical connector (or both) running to the valve which will need to be detached.

How do I know if the EGR valve is bad?

EGR valve symptoms can vary, however, the most common symptoms of a faulty EGR valve are explored below:

  1. Your engine has a rough idle.
  2. Your car has poor performance.
  3. You have increased fuel consumption.
  4. Your car frequently stalls when idling.
  5. You can smell fuel.
  6. Your engine management light stays on.

What is a pintle position sensor?

A voltage signal representing the EGR valve pintle position is sent to the PCM from the EGR valve. This feedback signal can also be monitored on a scan tool and is the actual position of the EGR pintle. The Actual EGR Position should always be near the commanded or Desired EGR Position.

Will a bad EGR valve cause a misfire?

A bad EGR valve may cause random engine misfires if it is causing a vacuum leak in the engine. This can cause a vacuum leak in the intake manifold that can cause an intermittent engine misfire.

Is it better to clean or replace EGR valve?

If your car is running fine at idle and you don’t have a check engine light, there’s no need to replace or clean an EGR valve. Some shops recommend periodic cleaning. If the valve is stuck open due to carbon, rather than the money to clean it, you’re better off having the shop install a new EGR valve.

What are symptoms of EGR failure?

What are the symptoms of a failing EGR valve?

  • Your engine has a rough idle.
  • Your car has poor performance.
  • You have increased fuel consumption.
  • Your car frequently stalls when idling.
  • You can smell fuel.
  • Your engine management light stays on.
  • Your car produces more emissions.
  • You hear knocking noises coming from the engine.

What does the EGR valve position sensor do?

The EGR Position sensor detects the movement and position of the EGR valve pintle. The EGR Pressure sensor detects exhaust gas flow through the EGR passage.

What does the p1406 code mean on a Chevrolet?

The P1406 code means that the EGR valve is 10% of the expected position by the Powertrain Control Module (PCM), usually caused by carbon built up n the EGR valve. Start by cleaning the EGR valve. What is the cost to diagnose the P1406 CHEVROLET code Labor: 1.0

Why is the EGR valve on my p1406 Chevy stuck?

P1406 CHEVROLET Meaning The Powertrain Control Module (PCM) determines that the EGR valve is stuck open if the actual Exhaust Gas Recirculation (EGR) position and the learned closed EGR position vary by more than a predetermined value. The PCM tests for a stuck valve when the desired EGR position is at 0%.

How much does it cost to repair a p1406 Chevrolet?

Start by cleaning the EGR valve. The cost to diagnose the P1406 CHEVROLET code is 1.0 hour of labor. The auto repair’s diagnosis time and labor rates vary by location, vehicle’s make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.