6th Gen ('00-'05): P0441 2000 Monte Carlo

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Jul 26, 2018 | 08:24 AM

#11

Jason B

Thread Starter

Joined: May 2015

Posts: 95

From: Long Island, New York

Quote:

Originally Posted by chifan

For me it was the P0449. I was just answering the question of whether anyone had experienced any other EVAP issues...

Okay, I'll have to keep that in mind in case I get this code. Thank you!!

Quote:

Originally Posted by Onion39

I had this code and replaced the EVAP canister and the gas cap, but the problem turned out to be the fuel tank pressure sensor. About $50 and a few minutes of installation and CEL reset and I was good to go.

Okay, I'll give that a go.

As far as the smoke test goes, I'll probably get that done this week.
I'll update as I go.

Jul 30, 2018 | 01:23 PM

#12

Jason B

Thread Starter

Joined: May 2015

Posts: 95

From: Long Island, New York

I tried running some tests with a OBD2 scanner and kept refusing to scan. I kept getting "Excess vacuum".
Any ideas?

Jul 30, 2018 | 03:24 PM

#13

Jason B

Thread Starter

Joined: May 2015

Posts: 95

From: Long Island, New York

P0441 is gone. Now it is P0446.
Interesting.

So using an OBD II scanner it shows that at all times, whether the gas cap is on or off, the fuel tank pressure is -30.63 mmHg and 4.8V, at ALL times. Would this mean the FTPS is bad?

Last edited by Jason B; Jul 30, 2018 at 04:10 PM.

Jul 31, 2018 | 04:10 PM

#14

Jason B

Thread Starter

Joined: May 2015

Posts: 95

From: Long Island, New York

UPDATE
The problem is fixed. After replacing the Fuel tank pressure sensor I rechecked the values. With cap on and car in on position not running I can see 0.56 mmHg and 1.45V with my OBD2 scanner. I can now run test on all solenoids and no longer get "Excess Vacuum" notice.

Last edited by Jason B; Aug 1, 2018 at 11:34 AM.