Need help with trouble code

cobrarwanab

cobrarwanab

Club Member
2008 Chevy Malibu. Code p04720 can't find any information on what this code is. Poor performance, fluctuations in rpm.
 
Are you sure that number is correct? It seems like an extra digit for a P-0 code unless it's manufacturer specific.

P0472 exhaust system pressure low
Nothing for P4720
 
That's what I was thinking. It's my cousins car and she said that was the number her onstar gave her. Does the Malibu have a exhaust back pressure sensor?
 
I'm not too familiar with GM but maybe a failed MAP sensor,EGR stuck or something causing excess pressure. I'd assume that there'd be more DTCs to accompany it tho. Any repair work done recently?
 
mustangmike6996 said:
I'm not too familiar with GM but maybe a failed MAP sensor,EGR stuck or something causing excess pressure. I'd assume that there'd be more DTCs to accompany it tho. Any repair work done recently?
Click to expand...
She lives in Indiana and just baught the car from a used car lot. She took it back in and they said the scan came up "null" so she used her onstar and they gave her the above code. That's pretty much all the info I have lol. She said the problem is somewhat inermit but occurs often. Sometimes won't shift out of 1st gear and when cruise control is used Wil sometimes jump from 2000 rpm to 4000 rpm.
 
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