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Check engine light after brake job.

Tiny
MATTSCARBRO
  • MEMBER
  • 2007 JEEP GRAND CHEROKEE
  • 90,000 MILES
I just changed the front rotors & pads as well as the rear pads on my wife's jeep. During the first drive, a check engine light came on. It was my first time working on it but it was pretty straight forward unless I missed something. Any ideas as to what could cause this?
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Monday, June 11th, 2012 AT 1:46 AM

7 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
The first thing you need to do is take it to a auto parts store like auto zone and have them scan the computer for codes. Post the exact code numbers not code descriptions. Thats are starting point.
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Monday, June 11th, 2012 AT 1:52 AM
Tiny
MATTSCARBRO
  • MEMBER
  • 4 POSTS
Po730 is the code its throwing. Autozone didn't even have a description for it.
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Monday, June 11th, 2012 AT 2:22 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
That code is for incorrect gear ratio. Do you have abs?
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Monday, June 11th, 2012 AT 2:42 AM
Tiny
MATTSCARBRO
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  • 4 POSTS
Yes it does.
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Monday, June 11th, 2012 AT 3:00 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
I would check all your abs wheel speed harnesses for being damaged from the brake job that makes the most sense. Let me know what you find.
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Monday, June 11th, 2012 AT 3:10 AM
Tiny
MATTSCARBRO
  • MEMBER
  • 4 POSTS
Well autozone cleared the CEL and my wife drove the car all day today and it hasn't come back on. It could be a freak incident but if it comes on again I'll let you know.
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Tuesday, June 12th, 2012 AT 1:15 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Anything is possible keep me posted on the light and code status.
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Tuesday, June 12th, 2012 AT 1:26 AM

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