Question about Pontiac Grand Prix

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Engine code P2440 is reading and check engine light is on. I have replaced the valve, however engine light came back on after being reset and code again reads P2440. Any suggestions of what might be causing this?

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6 Suggested Answers

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Posted on Jan 02, 2017

468 Chevelle
  • 81 Answers

SOURCE: Service engine code indicates EGR valve.

You could have a restriction in the egr ports. remove the valve. Plug the holes, start engine. 1 hole will be blowing out exhaust, the other will have large vacuum.

Posted on Mar 28, 2009

  • 3854 Answers

SOURCE: Check engine light

A multi misfire may mean that one or more of the following has happened:
Faulty spark plug or wires, Faulty coil (pack), Faulty oxygen sensor(s), Faulty fuel injector(s), Stuck/blocked EGR valve / passages, Faulty camshaft position sensor, Defective computer.

The engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wire, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the the problems were faulty fuel injectors. 

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Good luck and hope this information helps, keep me posted, be glad to help you get the truck running 100% again. Not sure if your running a K&N air filter, and if you are there may be a flim of oil on the MAF sensor that is making you run lean. You may want to spray down the MAF sensor with a can of MAF cleaner. 

Posted on Jul 02, 2009

  • 103 Answers

SOURCE: 2004 colorado code p0172

check your gas cap. If you fill your gas while the vehicle is running, it will also cause your light to come on. Go to OReilys or Autozone and they will shut it off for free and tell you the problem

Posted on Jul 25, 2009

  • 19 Answers

SOURCE: toyota seinna po440, po441, po446

you have to understand that there is a leak in the system other than the gas cap for the evaporative system. The system needs to be professionally closed, and smoke introduced into to find the leak, and a through component check, eg.. purge valve vapor canister vent solenoid all functioning correctly

Posted on Sep 01, 2009

  • 518 Answers

SOURCE: check engine light on code reads p2096 what

Fuel trim too lean. Usually means vacuum leak. Look for crushed,broken or melted off vacuum hoses near intake manifold. Or an obvious hissing noise at a normal idle. If so replace or repair clear codes your done. If not obvious take carb cleaner spray with nozzle attached car running & go over all vacuum hoses,intake manifold,egr valve see if idle raises if so you found leak. Repair. Could also be bad oxygen sensor switching bad o2 sensor but rarely.

Posted on Jun 06, 2010

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1 Answer

Engine code P2440 is in my 2006 Pontiac grand pix. I have replaced the valve, however engine light came back on and again code P2440 is reading. Any suggestions of how to fix this?

1. Using a scanner, turn the Key On Engine Off (KOEO).

2. Check for a baro reading from the AIR pressure sensor of about 100 kPa (or 14.7 PSI)

3. Start the engine, turn on the air pump and the AIR control solenoid valve. This will measure the pressure from the air moving through the system into the exhaust. Expect to see 8-10 kPa higher than the KOEO kPa reading (or 1.16 to 1.45 PSI higher than KOEO PSI reading).

4. With the engine running, turn on the air pump, but shut off the AIR control solenoid valve. (This is basically a dead head test of the air pump). Expect to see 15 to 22 kPa above the KOEO baro reading (or 2.18 to 3.20 PSI above the KOEO PSI reading).

Apr 14, 2014 | 2006 Pontiac Grand Prix

1 Answer

Check engine light on with code p2440

That code is related to the Secondary Air Injection System (SAIS) switching valve being stuck open. This valve is located on the passenger side of the engine mid position.

Feb 01, 2014 | 2008 Chevrolet TrailBlazer LT

1 Answer

My 2006 Toyota Tundra's check engine light came on, the engine code gave me p2440. The truck had to power on the highway, reseting the computer fixed the problem temporarily, what should I do?

run the fault codes to find why the engine went into limp mode . to reset the light is not the answer as it may be over heating or low oil pressure all of which is bad news for the engine.

Oct 08, 2013 | Toyota Cars & Trucks

1 Answer

Check engine light code p2440

Put the OBD P2440 into Google for the answer

Jul 09, 2013 | Cars & Trucks

2 Answers

Grand Prix pontiac error code p0411 and p2440

P2440 refers to the Secondary Air Injection system. It means that the switching valve is stuck open. We already replaced the secondary air flow pump, now it's telling us that's its the secondary air flow sensor and the valve is stuck open. the code is coming up P2440

Oct 15, 2011 | 2006 Pontiac Grand Prix

1 Answer

What does engine code p2440 indicate?

P2440 Secondary Air Injection System Switching Valve Stuck Open Bank1

Problem is usually the air switching valve that operates the air line coming from air intake to air pump, clean it or replace it.

Here a bulletin.

Aug 11, 2010 | 2007 Chevrolet Cobalt Coupe

1 Answer

Engine service light

The DPFE (Diferential Pressure Sensor)sensor is usually mounted on the engine and is connected to the pipe that runs from the exhaust manifold to the EGR valve with two rubber hoses. When the sensor goes bad, the Check Engine light comes on and typically sets any or all of teh following fault codes: P0171 & P0174 (lean codes), and/or P0401 (insufficient EGR flow). Nine out of ten times, the fault is not a bad EGR valve or a vacuum leak, but a bad DPFE sensor. A replacement costs about $112 at Ford, or about $48 at an aftermarket auto parts store.I hope this helps.

Sep 30, 2008 | 2001 Ford Mustang

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