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I have a 2004 chev suburban and I am gettingtwo codes CO240…

Customer Question
Hi. I have a...

Hi. I have a 2004 chev suburban and I am gettingtwo codes CO240 and P2135 the engine light comes on and says reduced engine stability system disabled

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

Vibrates and eventually shuts off while I am driving, already changed throttle body/sensor

Submitted: 2 years ago.Category: Chevy
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Answered in 16 minutes by:
2/13/2016
Chevy Mechanic: Gary, Chevy Technician replied 2 years ago
Gary
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 18,031
Experience: 15 years GM master tech
Verified

I am sorry your having this problem

did changing the sensors in the throttle body help at all ?

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Customer reply replied 2 years ago
no it did not help. it is still doing it
Chevy Mechanic: Gary, Chevy Technician replied 2 years ago

if you clear the code how soon before they reset ?

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Customer reply replied 2 years ago
it resets and the engine light goes back off then 5 minutes later it comes back on
Chevy Mechanic: Gary, Chevy Technician replied 2 years ago

do you have a multi meter on hand ?

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Customer reply replied 2 years ago
no
Chevy Mechanic: Gary, Chevy Technician replied 2 years ago

hands down the biggest issue causing this code is the throttle body connector itself with the wires internally in the connector have bad crimps on them the best action is to replace the connector with a new one

if by chance it still sets this code and the wiring visually is good between the throttle body and the TAC module you need to replace the complete throttle body

those are the 3 things that cause this code

if you have any questions please ask as i do not get credit for my work until you rate us here at Justanswer

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Customer reply replied 2 years ago
all these have been replaced already.. what about the EBCM code it gives?
Customer reply replied 2 years ago
it gives both of those codes
Chevy Mechanic: Gary, Chevy Technician replied 2 years ago

this has a brand new connector on it ?

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Customer reply replied 2 years ago
yep and a throttle body and sensors
Chevy Mechanic: Gary, Chevy Technician replied 2 years ago

ok with that code set to find the problem we need to do some tests with a multi meter

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Customer reply replied 2 years ago
ok
Chevy Mechanic: Gary, Chevy Technician replied 2 years ago

then we can do a few volt tests

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