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code p 1187

 
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Old 29 Sep 2008, 12:48 am
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Smile code p 1187

What does this mean? p 1187 is this really bad? I was just about to take my Grandma to the beachany help would be really great.
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Old 01 Oct 2008, 03:34 pm
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Location: Indianapolis
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Default Re: code p 1187

Quote:
Originally Posted by shorty68 View Post
What does this mean? p 1187 is this really bad? I was just about to take my Grandma to the beachany help would be really great.
I think P1187 is over boost? Usually part throttle over boost. Means you made more than X psi (I can't remember the number. 5 psi maybe?) without being at WOT (Wide Open Throttle - foot to the floor) Disconnect your negative battery terminal and it will clear the code. See if it happens again. Have you altered the wastegate? Do you have a boost controller?
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Wait wait wait, if "boost gets your laid" how come all you get is shaft play?
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Old 01 Oct 2008, 04:06 pm
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Default Re: code p 1187

let us know the details of the car ?? and when & how it happened
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Old 01 Oct 2008, 04:17 pm
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Default Re: code p 1187

crap I was wrong. P1187 EOT Sensor Ckt. Low Voltage. Oxygen sensory might be cooked. Check your exhaust near the cat.
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Wait wait wait, if "boost gets your laid" how come all you get is shaft play?
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Old 01 Oct 2008, 05:29 pm
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Default Re: code p 1187

I disconnected and reconnected the negative battery cable. So far, the engine light seems to stay off while driving. Hopefully this solved the problem. Thanks.
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Old 19 Feb 2019, 12:44 pm
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Join Date: Aug 2007
Posts: 73
Default Re: code p 1187

I'm posting this since when I searched for this code, I could not find any information as to what it really means. So P1187 is inlet pressure / map correlation. When the car's ignition is first turned on the PCM compares the map sensor reading with the tip sensor reading. Their calculated pressure values should be close to each other. If the pressure is off by more than a certain amount then this code is set in the PCM. If you have a scan tool you can read this value, normally it's around 1.00 with the key on and engine not running and is the ratio of the map/tip sensor data and Is called P-Ratio MAP/Baro.
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