Cadillac

Cadillac repair questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

Have p0089 on 2008 STS 3.6. Just hesitating a bit here and…

Have p0089 on 2008...

Have p0089 on 2008 STS 3.6. Just hesitating a bit here and there. Changed fuel filter. No change. Is this automatically fuel pump?

Mechanic's Assistant: Is the fuel filter an external one, or is it inside the tank?

External

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

Just replaced filter. High mileage car. Sure dealer will run bill up so exploring options

Show More
Show Less
Ask Your Own Cadillac Question
Answered in 5 minutes by:
6/19/2017
Ron
Ron, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 38,577
Experience: 34 year as an ASE Tech
Verified

Hello. My name is ***** ***** I am happy to assist you today. Give me just a moment to review your post, and I'll be right back with the help you need.

Ask Your Own Cadillac Question

The most common cause for the P0089 to set on your CTS is in most cases a failing high pressure fuel pump. Do you have access to a scan tool that can read the fuel pressure values while the problem is occurring?

Ask Your Own Cadillac Question
Customer reply replied 1 year ago
Probably not an issue but car is STS not CTS. In 2008 STS, is high pressure pump accessible via rear seat or do you have to drop the tank? I can get to someone with scan tool tomorrow. Have 235,000 miles. Runs great but assessing whether worth replacing pump

Sorry the CTS was a typo on my part but the answer remains the same. You will want to check the Fuel Rail Pressure Sensor value on the scanner. The pressure should be approximately 3.5–5.5 MPa (508–798 PSI). Attempt to command the fuel pressure high using the scanner. The high pressure pump on your 3.6 is not in the tank, it mount to the engine . See the link below.

https://dl.dropboxusercontent.com/u/104923897/High%20pressure%20fuel%20pump%20Jun%2019.pdf

Ask Your Own Cadillac Question
Customer reply replied 1 year ago
That makes sense!. Low pressure pump in tank just feeds high pressure on engine? Appreciate your help Ron. If I have questions tomorrow after scan, can I reach back out or do I have to initiate another conversation?

Yes the post remains open as long as you need me even after you rate the service simply post back if need be. Please take a moment to rate my service so I can get credit for my time, the question remains open for follow up even after doing so, all you need to do is return to this question if need be.

Thank you again.

Ron
Ron, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 38,577
Experience: 34 year as an ASE Tech
Verified
Ron and 87 other Cadillac Specialists are ready to help you
Ask your own question now
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a cadillac mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Ron Your Own Question
Ron
Ron
Ron, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 38,577
38,577 Satisfied Customers
Experience: 34 year as an ASE Tech

Ron is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Jerry Newton

Jerry Newton

Cadillac Technician

1,730 satisfied customers

ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.

Dave Nova

Dave Nova

Cadillac Technician

1,522 satisfied customers

ASE Master Certification. GM World Class Certification

Gm Tech (Cam)

Gm Tech (Cam)

Cadillac Mechanic

1,075 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

John

John

ASE Certified Technician

941 satisfied customers

ASE CERTIFICATIONS A1-A8 & L1 / 40 YEARS AUTOMOTIVE EXPERIENCE

Chris (aka- Moose)

Chris (aka- Moose)

Cadillac Technician

795 satisfied customers

16 years of experience

George H.

George H.

ASE Certified Technician

781 satisfied customers

ASE Master Tech 15+ Years

Don - Mo Lurch

Don - Mo Lurch

Cadillac Technician

704 satisfied customers

GM, Cadillac Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

< Previous | Next >

Related Cadillac Questions
I have an 08 sts 3.6 that has gone into engine power
I have an 08 sts 3.6 that has gone into engine power reduced. And the obd2 reader says p0089 is the code that initiates the engine light and once I cleared that and started the car it immediately came… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Looking for the location of the high pressure fuel pump,
Looking for the location of the high pressure fuel pump, 2008 cadillac sts … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,432 satisfied customers
I have a 2008 Cadilac STS with a 3.6 with 104,000 miles. I
I have a 2008 Cadilac STS with a 3.6 with 104,000 miles. I am getting consistent codes of P0300 P0302 P0304 P0306. (all bank 2). I also occasionally get P0019 and P0089 but not all the time. I also ha… read more
Gary
Gary
Senior Technician
Vocational, Technical or Trade School
97 satisfied customers
TECH, CADILLAC CAME IN WITH DAMAGED ENGINE NOT RUNNING. LACK
i AM A TECH, CADILLAC CAME IN WITH DAMAGED ENGINE NOT RUNNING. LACK OF OIL SERVICE DAMAGED THE ENGINE. REPLACED WITH A REBUILT ENGINE. i ALSO REPLACED ALL INJECTORS. AFTER COMPLETION OF ENGINE INSTALL… read more
Jaybird61
Jaybird61
Master Automotive Mechanic
2,281 satisfied customers
My 2005 Cadillac STS V6 3.6 liter engine flutters and cuts
My 2005 Cadillac STS V6 3.6 liter engine flutters and cuts off sometimes when I stop and proceed to pull off again, or when I back up and park . … read more
Mechanic01
Mechanic01
3,169 satisfied customers
A 2005 caddy STS 3.6 engine. I've been making a rattling
A 2005 caddy STS 3.6 engine. I've been making a rattling noise underneath. One man said that he thought it was inside a catalytic converter rattling. We parked the car for a couple of days then when I… read more
DoctorD
DoctorD
Shop Owner
Vocational, Technical or Trade Scho
652 satisfied customers
Codes p0087.p0089 and p0090..car info center states reduced
codes p0087.p0089 and p0090..car info center states reduced engine power and went into limp mode,and cel on now...car wont go over 10 mph..trying to see if this is possibly covered under special cover… read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
How do I change my driver side motor mount on my 2005 sts
How do I change my driver side motor mount on my 2005 sts 3.6 thank you … read more
Chris (aka- Moose)
Chris (aka- Moose)
Cadillac Technician
Vocational, Technical or Trade School
795 satisfied customers
Check engine is on code p0087, yes but it came back on
no just want to have an idea what it is before taking it to a shop… read more
Ryan Schott
Ryan Schott
76 satisfied customers
I have a 2008 Cadillac dts and I noticed on a few occasions
I have a 2008 Cadillac dts and I noticed on a few occasions earlier the car hesitated during the while driving. After I parked the vehicle, a hour later I went to crank it and it chiled a cew.times an… read more
Ron
Ron
ASE Certified Technician
38,577 satisfied customers
Cadillac Seville STS: Im having problems with the HC being
I'm having problems with the HC being high on my 1999 STS, will replacing the O2 sensors solve the problem?… read more
Bill
Bill
Foreman/Team Leader
Vocational, Technical or Trade Scho
593 satisfied customers
Cadillac CTS: 2008 Cadillac CTS 3.6 V6Had a cylinder 3 and
2008 Cadillac CTS 3.6 V6 Had a cylinder 3 and 4 misfire Random misfire and a code P0017 Replaced all plugs and all 4 cam sensors and crankshaft position sensor Reset everything, drove the car and the … read more
Bill
Bill
Foreman/Team Leader
Vocational, Technical or Trade Scho
593 satisfied customers
Cadillac STS: I went to have my oil changed on my 2007 STS
I went to have my oil changed on my 2007 STS and was told the water pump s going bad. They said you could tell because of a rust colored place on the water punp. They said this is an indicator to repl… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
i am thinking of buying a 2008 STS with a 4.6L Northstar Variable
i am thinking of buying a 2008 STS with a 4.6L Northstar Variable Vavle Timing V8SFI one dealer put it this way... it has a less desirable engine. Is this true and what is the problem? this car has 77… read more
Jerry Newton
Jerry Newton
Cadillac Technician
Vocational, Technical or Trade Scho
1,730 satisfied customers
99 STS: hard starting..it runs fine.I am not sure if the full filter
I have a hard starting problem.Once my 99 STS starts it runs fine.I am not sure if the full filter has been replaced. If I change the full filter will this problem be corrected and where is the fuel f… read more
Mark
Mark
Line Technician
Associate Degree
339 satisfied customers
2008 Cadillac SRX: 000 miles ) serviced..oil level..oil changed
I just had my 2008 Cadillac SRX (26,000 miles) serviced by a GM dealer. I was shocked when he told me the oil level was very low (down several quarts). We have always had our oil changed evry 3-5 k mi… read more
David H
David H
Vocational, Technical or Trade Scho
2,413 satisfied customers
2000 cadillac STS: motors..Replaced relay fuses (3) main, a/c and S/P.
2000 cadillac STS fan motors are not working. Replaced relay fuses (3) main, a/c and S/P. what next?… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
GM: Dealership..my oil overfilled by about 2 quarts..V8..V6
The GM Dealership that changed my oil overfilled by about 2 quarts. I just discovered this at first I wasn't sure why I was getting such a high reading on the dipstick then I pulled out the the bill a… read more
Cahelp4u
Cahelp4u
GM Service Training
2,560 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x