TK11069

This is the error:

P1433 Secondary Air Injection (AIR) Pump Relay -J299 Open circuit implausible signal

Car drives fine.

I read it could be a faulty AIR Pump Relay, AIR Pump Relay harness is open or shorted, or AIR Pump Relay circuit poor electrical connection.

Is the relay or air pump easily accessible and where is it?

kevincarreras

i got the same error code today. Did you figure out what it is?

TK11069

Nope. I cleared it to see if it would come back and it has not. I'm wondering if I got water somewhere when I cleaned the engine top and underside. Just passed state inspection Friday.

kevincarreras

cool, I am going to clear the code today and hope that it won't ever return again. thanks!

TK11069

Well, it came back. I guess I have to take it in since no one here seems to have ever found a solution to this.

kevincarreras

i know what caused the error code on mine. It was due to a loose exhaust vacuum on the rear passenger side. Took me 2 mins to reconnect it to the exhaust valve.

TK11069

How did you know that was it?

kevincarreras

i have read a few discussions about this and it seems to be a pretty common issue on 991.1.

The exhaust vacuum line was obviously disconnected when I checked. so what I did was I jacked the car up in the air and reconnected the line to the valve (2 mins job), then cleared the code. It has been error free for the last 1k miles.

If it's not a loose vacuum line then your solenoid is probably the culprit which would cost a bit more time and money to fix.

TK11069

Yep, that was it! Passenger side was completely disconnected. :-)

kevincarreras

awesome. You just saved yourself a few hundred bucks. =)