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P2440 how to fix

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You Type: Chevy Trailblazer OBD 2440

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Posted on Mar 30, 2014


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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

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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

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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

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How to fix P2430 code on a 2006 Pontiac Grand Prix

P2430 Secondary Air Injection System Air Flow/Pressure Sensor Circuit,
The AIR diagnostic uses 3 phases to test the AIR system:

DTCs P0411 and P2430 run during Phase 1
DTCs P2430 and P2440 run during Phase 2
DTC P2444 runs during Phase 3
During phase 2, only the AIR pump is activated. The solenoid valve is closed, this is p2430 and p2440. -The AIR system pressure sensor is stuck. good-day !!

Jul 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

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