Question about 2004 Jeep Grand Cherokee

1 Answer

My jeep gand cherokee went into limp mode 150km after having a custom made freeflow exhuast system fitted. My regular mechanic who has a diagnostic box with limited capacity picked up fault code "p1652 Combust". The gearbox was also reconditioned 3500 km ago and the gearbox-engine harness repaired at the same time. My mechanic "cancelled the problem" so the car is going fine, but no actul lwork was done on the car. Can I take it that the problem is solved (by itself) or should I have the car taken back to either the guys who did the exhaust or the guys who did the gearbox and harness?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Jeep Master
  • 17,970 Answers

According with the parts ans jobs there, sound like a electrical problem or harnesses connections problem; Jeep DTC P1652 is refer at J1850 Communication Bus short to ground.

The J1850 Connector is the connector that you plug the OBDII Scan tool into. It is located under the dash facing the driver's seat (generally). Sometimes this occurs under "unauthorized reset" condition.

HERE you have additional details. In order to solve it, you will need visit your local Jeep dealer.

I know that isnt good news, but hope this helps.

Posted on Feb 16, 2012

  • Roger Adams Feb 17, 2012

    I do not understand what you mean by: "...Jeep DTC P1652 is refer at J1850 Communication Bus short to ground...." please explain in simple language.

  • ZJ Limited
    ZJ Limited Feb 17, 2012

    You have a "communication problem" with the connector (named J850), this is the reason because PCM (Powetrain Control Module, called computer) showed code P1652. This cpnnecto could be damaged.

    In the previous link, check the diagram and pin number 2 and 10, they are related at J1850. If you dont understand this, I sugges strongley check, test and make this job with some specialist in your local area or your Jeep dealer.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Mechanics advised that gearbox needs replace after diagnostic Of codes . Dash light still on after codes being read , have had ecu replaced 2yrs ago ? What do you think it could be , thanks phil

didnt specify vehicle --generic answer--until repair is made the vehicle will show engine light and have codes --if gearbox is problem for limp mode /until repairs are made or gearbox replaced you will be in limp mode --and as to sensor find out what one it was --start problem may show back up if sensor was problem --and GET a 3rd opinion you have 2 mechanics with different opinions on your problem and i guess they are reading your trouble codes differently

Sep 20, 2016 | Cars & Trucks

1 Answer

What does OBD code P1909 mean on a Saab 1.9 tid

P1909 - Trans Temp Sensor Circuit Open or Shorted to Pwr or Gnd
Read more:

Jun 12, 2014 | 2010 Saab 9-5

1 Answer

Sudden loss of power Jeep Grand Cherokee

One of the accelerator position sensors may be bad putting it into limp home mode . Have it scanned for codes and post them here .

Oct 03, 2017 | 2007 Jeep Grand Cherokee

1 Answer

How to get out of limp mode

when vehicle is shut off then restarted it will come out of limp mode. if problem is still there it will go back into limp mode. check for codes

Apr 21, 2013 | 2000 Jeep Grand Cherokee

1 Answer

Limp mode reset

Limp mode will reset by itself once the problem that caused the system to trigger the mode is repaired. You must have the Powertrain control module scanned there will be fault codes in memory. Once the codes are read then diagnostics are performed for each code and repairs made based on the findings.

Jun 25, 2012 | 2000 Jeep Grand Cherokee

1 Answer

Hi there, I have an 03/53 plate WJ Jeep Grand Cherokee 2.7CRD auto. It has the engine light on and was jumping in and out of limp mode. Now it seems to be constantly in limp mode and no diagnostic...

code p 0340 refers to cam shaft position sensor(CMP) sensor A bank 1--circuit malfunction====causes --wiring-- CMP sensor-- ECM
code p 0700 refers to transmission control system/ MIL--malfunction===causes --wiring---TCM
parts are available on line from e-bay , wreckers , junk yards manufacturer spares departments and would be delivered within 30 days so why are you waiting 7 months to get parts

May 07, 2017 | 2003 Jeep Grand Cherokee

1 Answer

I have a P0702 transmision trouble

Transmission Control System Electrical=P0702 code,
Have you talked to a jeep dealer yet,
Ask if there are any TSB's on this problem.
Technical Service Bulletins from Jeep when they find and solve different complaints.
What ever is doing this is a soft code,A soft code is one that will clear it's self with the cycle of the key to off then on and code goes away,But have them check history codes to see if it is sounds like it is going into limp mode,this feature is when the computer sees a transmission falt it wont up shift,so you don't harm the tranny,but will let you limp to a shop to get repaired.have you ever noticed the speedometer going to 0 then this happens?
that would be the output sensor.

Nov 15, 2009 | 1993 Jeep Grand Cherokee

2 Answers

Changing my 1989 from 4 wheel drive to 2 wheel drive and Anti-Locking Braking System

An ABS system will have wheel sensors installed. Remove one of your wheels and look for a wiring harness that runs to your steering knuckle(the part that you brake rotor and strut is attached to. Also, either you front half shaft or brake rotor will have what looks like gear teeth on them. These are the magnets the sensor reads. If your Jeep has either of these it has an ABS system. Secondly the chassis on the Cherokees should be the same irregardless of trim level (limited vs regular). These trim levels affect the interior trim and power extras only not the mechanical parts.

Oct 05, 2008 | 1989 Jeep Cherokee

Not finding what you are looking for?
2004 Jeep Grand Cherokee Logo

Related Topics:

237 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts


Level 3 Expert

76846 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

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

Answer questions

Manuals & User Guides