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P0440 and P1188

 
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Old 16 Oct 2010, 04:58 am
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Default P0440 and P1188

So I got 2 codes and they are as follows;

P0440 and P1188.

I checked out the sticky and found out what they stood for. Still a bit curious as to what line exactly I'm tracing back in order to solve the issue. I googled it and came back with this page which gave a pretty good detailed explanation, however which line am I tracing exactly in my GT?

EVAP Evaporative Emission Control System

As for P1188, I'm a bit lost here. Sticky stated it was for EOT Sensor CKT High Voltage.

Before the questions come in, I have not done any modifications before or after receiving the engine codes. It's been about a month+ since I changed my spark plugs and wires and that's the last thing I got done to the car. It's been running fine before that and even better since then.

Thanks in advance!

-Freddy
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Old 16 Oct 2010, 07:01 am
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Default Re: P0440 and P1188

From PT Do-It-Yourself.net


P0440 - General EVAP System Failure

Possible causes include:

Visual and Physical Inspection
Evap Purge Solenoid Vacuum Supply Inspection
Evap Purge Solenoid Stuck Closed
NVLD Switch Operation
(Z1) Ground Circuit Open
NVLD Assembly
NVLD Switch Signal Circuit Open
Evaporative Emission Leak Detection
PCM

Take it to a DC dealer. They have the necessary equipment and experience to diagnose most faults. If you are using a DC dealer and they have been unsuccessful in resolving it obtain a second opinion from another DC dealer.

You can DIY the visual and physical inspection of the Evaporative Emission system, but to check the remainder of potential causes, a DRB III scan tool, diagnostic manual and assorted other automotive test equipment is necessary.

Perform a visual and physical inspection of the entire Evaporative Emission system. Check for the following conditions:

Hoses disconnected or left off
Holes or cracks
Loose seal points
Evidence of damaged components
Incorrect routing of hoses and tubes
Fuel Cap left off or bad gasket seal

==============================

I have a 2003 GT (LO) with 54k miles. This fault code (P1188) keeps reoccurring. We just bought this car and I would like to know what it is and what I need to do to fix it. Thanks. ľAlbert, from Kansas.

P1188 TIP Sensor Performance

Non-boost Mode: PCM detects a significant difference between TIP Sensor signal and BARO Pressure signal.

Boost Mode: The TIP Sensor is unable to read correct boost level.

Possible causes include:

Hoses and Tubing
Vacuum Supply to Surge Solenoid
Solenoid Test #1
Solenoid Test #2
Solenoid Test #3
Solenoid Test #4
Turbocharger
Wastegate Actuator

About the only thing you can check as a DIY'er is the hoses and tubing as indicated below.

Check all of the tubes and hoses between the air cleaner and the intake manifold for loose connection, damage or restriction.

Check all of the tubes connected to the intercooler for loose connection, damage or restriction.

Check all of the tubes and hoses connected to the turbocharger, TIP Solenoid, Surge Solenoid and Wastegate Solenoid for loose connection, damage or restriction.

If the hoses and tubing are ok, your dealer will have to isolate the issue to one of the remaining components.
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Old 18 Oct 2010, 03:06 pm
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Default Re: P0440 and P1188

Well first off, thanks to my friend Mole' out in So-Cal

Learning more and more as I go.

Anyway I popped open the hood and found one of the lines was disconnected, plugged it back in and zip tied it so it's properly secured now. Thinking this is what set off P1188?

Dealerships charge an arm and a leg so checking out P0440 will have to wait in the meantime.

Otherwise, everything still runs perfectly fine (as I was told it should).

Sorry for the crappy pics, they're taken from my phone.
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Old 18 Oct 2010, 03:07 pm
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Default Re: P0440 and P1188

This line was disconnected from the turbo up pipe.



Decided to trace it back, it's plugged in here under #1 on the second row.

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Old 18 Oct 2010, 03:47 pm
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Default Re: P0440 and P1188

Your phone takes better pictures than most peoples camera.
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Old 18 Oct 2010, 03:57 pm
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Default Re: P0440 and P1188

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Originally Posted by CREWZIN View Post
Your phone takes better pictures than most peoples camera.
Lol thanks

For forums, I usually take pictures with my 10.1mp digital camera but if I really wanted high-quality I'd pull out the SLR and post RAW images

What are your thoughts regarding my conclusion (about code P1188)?

Hope the other one is taken care of easily.
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Old 18 Oct 2010, 04:07 pm
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Default Re: P0440 and P1188

Since the tests for the code 1188 involve the solenoids and the tube you found went directly to one of them, I'd say it was a pretty good bet that was the problem. Did you take the negative battery cable off for about 5 minutes to clear the computer of all codes? Then if the code doesn't come back, your good to go.
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Old 18 Oct 2010, 04:18 pm
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Default Re: P0440 and P1188

Quote:
Originally Posted by CREWZIN View Post
Since the tests for the code 1188 involve the solenoids and the tube you found went directly to one of them, I'd say it was a pretty good bet that was the problem. Did you take the negative battery cable off for about 5 minutes to clear the computer of all codes? Then if the code doesn't come back, your good to go.
Was going to disconnect it but decided not to because;
1. Getting a scan gauge sent out to me so I can reset codes/etc.

2. I hate disconnecting my battery, I lose my DTA/X-O/settings on my HU.

Oh well, might just go do that now. Can't wait til I get some more done to the GT
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Old 18 Oct 2010, 09:48 pm
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Default Re: P0440 and P1188

Well I disconnected the battery to reset the codes.

Drove around today for a good 2 1/2-3hours and they never returned
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