2007 bentley gtc
hi i am getting a check engine light
its a p2438 air injection system air flow pressure
what is the problem please someone help thanks

 

Hmmm, it could be the typical $3500 fix of the $300 defective hose just above the transmission. Thus it requires an engine out service. This is very common and Bentley knows of the defect. While they're in there, odds are you might need some suspension bushings and whatnot too so perhaps plan on around $5000 to get things sorted.

 

I don't disagree with Steven's observations, but am curious if you have any symptoms over and above the CEL. Is the engine idling smoothly?

Assuming you have a left-hand drive, try opening the driver's door with the engine running and listen for the sound of a pump running in the left front wheel well. Try stepping on the brake and then release it and see if the pump keeps running. Let us know.

 

Hello All,


I do not believe that the code is pertaining to the vacuum leaks or vacuum pump as the two previous post suggest, it is a secondary air injection code for bank 2.


.
P codes.


P2430
Secondary Air Injection System Air Flow/Pressure Sensor Circuit
P2431
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance
P2432
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Low
P2433
Secondary Air Injection System Air Flow/Pressure Sensor Circuit High
P2434
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Intermittent/Erratic
P2435
Secondary Air Injection System Air Flow/Pressure Sensor Circuit
P2436
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance
P2437
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Low
P2438
Secondary Air Injection System Air Flow/Pressure Sensor Circuit High
P2439
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Intermittent/Erratic
P2440
Secondary Air Injection System Switching Valve Stuck Open
P2441
Secondary Air Injection System Switching Valve Stuck Closed
P2442
Secondary Air Injection System Switching Valve Stuck Open
P2443
Secondary Air Injection System Switching Valve Stuck Closed
P2444
Secondary Air Injection System Pump Stuck On
P2445
Secondary Air Injection System Pump Stuck Off
P2446
Secondary Air Injection System Pump Stuck On
P2447
Secondary Air Injection System Pump Stuck Off.

 

Hmmm, is this the cold engine startup error? You know, during the first 60 seconds. If so, that's an easy $60 DIY fix. Let me know guys and I can take pics. My error code log is incomplete as was moving, yet part # is 07C906051.

 

Found my log, YES it is the part above. Lemme take some pics. BRB.


Ok, the procedure is as follows.


Open hood


Remove the plastic small black cover by pulling it towards the front of the car. This gives you working room.


Remove the two stock black ALLEN bolts (one top, one bottom). FYI: Stupid me dropped one during reinstallation so I used Phillips when reinstalling. It is a bit tight to get access to the lower bolt yet very doable and not really that hard.


Swap defective old for new part.


Reinstall screws HOPING to not have one drop onto the black hole of the car's lower aero (I used Blu-Tack as you can see on the bolt head).

Reinstall small black plastic grill bit

Clear error code.


You're done.

BTW this circuit is only used during startup so no damage or symptom during normal operation is what I've been told.

Drive it like you stole it.

 

I realise this is an old thread - but just wanted to say I had this very issue recently, ordered the £30 part, replaced the old worn part with the new ( so worn the screws had rusted into the thread ) reset the light and it has worked a treat.

Thank you for all the invaluable information on this forum !

 

I just got the P2433 code and MIL on. My RossTech says Bank 1 sensor is bad. I see the picture of the bank 2 sensor here. Does anyone know the location of the bank 1 sensor.? Hopefully it’s easy to reach...

 

Remove the facia... lots of t25 torx bolts.

Then remove right air intake. Push in toward the engine, twist it up and out.

There is the bank 1 secondary air pressure sensor.

 

I have this problem, are they related?

 

My bank 1 sensor problem with the check engine light on was the oxygen sensor.
I got the OEM part from Flying Spares, there's also a generic, and it was a bit tricky for the capable technician
to put in, but he did it. It's referenced on another thread in this forum.

 

I have a leak as my brake booster motor in the left wheel arch runs but i dont know if its causing the secondary air injection fault

 

Good day,
The secondary air pump is a 90 second positive air injection to expedite the heating of the catalysts. The system is activated when starting an ambiant temperature engine, [first start after not running for a while]. The vacuum booster is as the name states and is activated to assist various vacuum solenoids and the brake booster.

 

thank you for that but why is it got a fault. The car starts then idles at 500 rpm sounds horrible. The vacuum booster runs all the time when taking my foot off the pedal.

 

The vacuum pump running too often is diagnosed by preforming a smoke test. An online search "smoke test Bentley Continental" will reveal multiple YouTube videos. Probably a cracked line on the firewall behind the engine.

The secondary air pump issue is different and difficult to trouble solve from a far. This isn't related to the vacuum pump running alot...sorry to say.

I would concentrate on the vacuum pressure pressure issue first. This is a known prevailing issue. Eventually the vehicle will perform poorly if unchecked.