Question about 1999 Jeep Cherokee

1 Answer

Check engine light

My dads 99 cherokee had a check engine light on he had it checked and the guy told him its was an o2 sensor, sold him the part and he brought it home for me to install, i put it in and the light is still on. will it go out on its own or do i need to have the code erased?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 294 Answers

Get in car
Push brake and hold
Turn IGN ON/OFF/ON/OFF/ON
Wait for flashing lights sequence
Write then down (3 blink, pause, 2 blink pause, 7 blink, LONG pause = 327.. then another one comes, and another... these are what is keeping light on

Could be LOW Oil
Low Water
Low Washer fluid
Low Pwr Steering Fluid
Worn Brakes
Low Trans Fluid
Low Diff Fluid
Air Bag Deployment Ckt
LIGHT out ;-)
other.....

Look for Jeep Err codes on scroogle.org ;-)

Posted on Jan 18, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Signs of a bad valve cover gasket


My first question would be, what was the original trouble code that directed the mechanic to replace the sensors ? You seldom need more than one O2 sensor at a time. Its possible the exhaust manifold is leaking and that might cause a problem that would turn on the warning light. Or it could be something else.
A valve cover gasket will leak oil if it fails. No check engine light.

May 15, 2013 | 2000 Jeep Grand Cherokee Limited

1 Answer

I just got an oil change less than 3 weeks ago and today my engine starts knocking and my oil light is on, could that be a bad O2 sensor?


No Bad o2 But Check oil Level. How old Was The oil That Came Out? Fresh oil Will Clean Out Sludge Deposits If The oil Was'nt Changed In A Timely Manor It could Have caused leaks. also Check Drain Plug Gasket for leaks And Make Sure Oil Filter Is Correct And Tight.

Apr 15, 2013 | 1997 Buick LeSabre

1 Answer

Hey guys im pulling a p0138. i have a 99 jeep cherokee limited i checked the 15 amp fuses and replaced the upstream and downstream o2 sensors and it still keeps popping up. The check engine light is still...


Harness or connectors (The sensor circuit is open or shorted). Rear heated oxygen sensor (Bank 1) may be faulty. The rear heated oxygen sensor (or sensor 2), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Check your connections and make sure the right sensor is in the right location.

Dec 30, 2010 | 1999 Jeep Cherokee

1 Answer

Both under constant throttle and acceleration I have had hesitation on three separate occasions over 3 week period the rest of the time it runs fine.


Check the front O2 sensor. I had a 99 Jeep that would stutter and seem to lose power while accelerating. No check engine light came on but took it to a shop and had them put it on a computer. Come to find out that the O2 sensor was giving the engine misreads and was telling the engine to take in more fuel. Causing one of the cylinders to misfire.

Oct 06, 2010 | 1999 Jeep Cherokee

1 Answer

Will not idle


More likely something else is going on. If you had an O2 sensor issue, I would expect a check engine light...read those codes and you will knwo where to go next...

When an O2 sensor fails, the system goes into a limp home mode, and esentially runs poorly, again look for error codes.

Sep 19, 2009 | 1999 Jeep Grand Cherokee

1 Answer

O2 sensor


Suggest you disconnect the Battery for 15 minutes., Negative Post. Reconnect and take a run out of about 25 miles of mixed Highway, to enable the ECM to REBOOT.
Regards,DT

Sep 05, 2009 | 1997 Jeep Grand Cherokee

2 Answers

Engine light is on, car wont stay on


check the fuses , you can have a o2 sensor fuse open, also check the wiring because o2s are close to the cats or manifoldss some time they burn and get shorted.., other thing you can do is unplug the o2s and drive it like that and see if it shuts off , if it doesn't so the problem is around that sensor...hope this help..

Aug 03, 2009 | 1999 Dodge Intrepid

3 Answers

1997 Jeep Cherokee was an excellent runner until 2 weeks ago. Now it suddenly runs hot and dies. While driving intermittently sputters and miss fires. Check Engine light on. Replaced a few things. Should...


Well the water pump sounds bad....it is a cheap fix at $34.00 and will fix the overheating problem. The O2 sensors start at $63.00...but if you have a "check engine light" on, get it read at the parts store for free and see if the code is for the O2 sensor.

Jul 24, 2009 | 1996 Jeep Cherokee Country

1 Answer

02 sensor problem


Did your "check engine light" come on? If it did, then a mechanic would put a scope on your car's computer to read the malfunction code. The print out would indicate if the check engine light appeared because of a faulty O2 sensor. If you have a faulty O2 sensor it will need to be replaced since this it is the source of information for your car's computer with respect to fuel mixture.

Sep 07, 2008 | 2002 Pontiac Grand Prix

Not finding what you are looking for?
1999 Jeep Cherokee Logo

178 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

60792 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...