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My check engine lite is on & my car did not pass emmissions.

Customer Question
My check engine lite...

My check engine lite is on & my car did not pass emmissions. The garage says that I need to replace 2 knock sensors underneath the intake manifold. My dealership says my car may just need a software update or it could just be wiring to the sensors. Who to believe?

Mechanic's Assistant: Does the light stay on, or does it blink?

The light comes on after I drive about 60 miles. Then it will go off for a couple of days. Then come on again

Mechanic's Assistant: What is the model of your '60 Jeep?

2007 Jeep Gr Cherokee

Mechanic's Assistant: Are you fixing your Cherokee yourself? What have you tried so far?

I am not fixing myself---but I have 2 different opinions

Submitted: 10 months ago.Category: Jeep
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Answered in 2 minutes by:
9/22/2017
Jeep Mechanic: David Craig, Auto Mechanic replied 10 months ago
David Craig
David Craig, Auto Mechanic
Category: Jeep
Satisfied Customers: 5,991
Experience: Owner/Mechanic at 3D Automotive
Verified

Hi Im David, thanks for visiting the site. what are the fault codes number that are coming up?

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Customer reply replied 10 months ago
My car is in a garage with the peice of paper -I am calling them for the codes
Jeep Mechanic: David Craig, Auto Mechanic replied 10 months ago

ok, thank you.

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Customer reply replied 10 months ago
P0325
Customer reply replied 10 months ago
Code is P0325
Jeep Mechanic: David Craig, Auto Mechanic replied 10 months ago

ok, definitely the knock sensor, standby please

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Jeep Mechanic: David Craig, Auto Mechanic replied 10 months ago

what size engine please

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Customer reply replied 10 months ago
3.7L
Jeep Mechanic: David Craig, Auto Mechanic replied 10 months ago

thank you

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Jeep Mechanic: David Craig, Auto Mechanic replied 10 months ago

first of all its only knock sensor #1 that's failing, but unless they do the attached diagnostics there is no way they can say whether its the wiring or the sensor. it can even be the computer. so i would take these diagnostics to the shop and tell them to do their job correctly.

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Customer reply replied 10 months ago
The garage that I have it at wants $612 to replace the knock sensors ---the dealership says it may not be the knock sensors --that the car could need a software update or a wire is chewed....etc
Customer reply replied 10 months ago
what should I do?
Jeep Mechanic: David Craig, Auto Mechanic replied 10 months ago

standby please.

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Jeep Mechanic: David Craig, Auto Mechanic replied 10 months ago

I have to get to my shop. I will be back on in about an hour.

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Customer reply replied 10 months ago
Thank you -going to garage now to talk to them
Jeep Mechanic: David Craig, Auto Mechanic replied 10 months ago

ok

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