Question about 2000 Jeep Grand Cherokee

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2000 jeep grand cherokee trouble codes

Ecu internal malfunction code 11

Posted by Anonymous on

  • Charley S Nov 19, 2018

    ECU Code 11:
    Here's a possible reason:
    1. ECU Lost Battery Power
    According to MFG, the Code 11 indicates that the ECU has lost power. This could be caused by something simple like the battery being disconnected and the ECU has not seen a signal from the engine to indicate that the engine has turned over or an attempt to start it.

    NOTE: The code 11 would NOT be present if the engine has started since the battery was disconnected or since the ECU lost power.
    2. Another possibility FOR THE cODE 11 is there is no signal from the ignition sensor. This sensor has been called the ‘distributor pick-up’ sensor or ‘Hall Effect Pickup’ (aka HEP)
    3. Because the HEP receives power and sends a signal to the ECU, if there is no signal from the HEP, code 11 can be thrown.
    4. If the wiring and connections between the HEP (located underneath the distributer cap) and the logic module are faulty, code 11 can be thrown.

    Check for continuity (a good circuit) at the connectors.

    What is a HEP:
    The HEP is a magnetic sensor which charges when the shutter plate is not present in the gap, and produces a voltage. When the shutter plate enters the gap as the distributor turns, the signal is disrupted and the ECU grounds the primary coil circuit, which fires the plugs.

    If there is no continuity in the Hall Effect sensor as the distributor shutter passes through the gap, then either the HEP is bad or the connections at the end of the wires have broken.

    It ‘may’ be possible to repair them if that’s the case. You’ll have to solder the wire to the right pin of the connector to repair it. Otherwise the HEP will have to be replaced. When you reconnect the HEP connectors to the harness, be sure to use dielectric grease on the connector to prevent corrosion and shorts.



1 Answer

STEVE yes that one

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  • Jeep Master
  • 35,558 Answers

It probably has a broken solder joint inside. its very common on a lot of jeeps of that vintage. there are a few you tube vids describing and fixing the problem

Posted on Nov 19, 2018


5 Related Answers


Jeremiah Meyer

  • 204 Answers

SOURCE: check engien lihgt with code p1762

CEL Code P1762 is Governor Pressure Sensor Offset Improper Voltage. Make sure all your wires going to the sensor are ok, then if they are I would look into a new Sensor. Hope this gives you some direction. Thanks for Using FixYa!



Posted on Nov 30, 2008


Richard Scordino

  • 6982 Answers

SOURCE: 2000 jeep grand cherokee limited starts in 3rd gear

oil pressure problem should be checked independently of other problems...Use a good accurate mechanical gauge to check. If pressure is good (no less than 15psi at idle hot (I prefer to see at least 20) check dash grounding, block ground and if OK, change sending unit. Dash and body ground can influence operation of shift and body control modules so indirectly your problem may or may not be related, depending upon what you find while testing. And it could turn out to be a defective module! They are expensive and just plugging new ones in may work, but then again, it might not. I might be totally incorrect on this...that's the value of actually being there instead of doing this by "remote control".
If you read the numerous posts pertaining to all vehicles, you will see that you are not alone with electrical problems...As long as the engineers who design this stuff, keep using "modules" to replace ordinary simple and reliable systems, we will continue to have these problems. Do some testing and I'm sure you will find a solution! (I'm still waiting for someone to make a program for a PC that will give a complete readout of every system in a vehicle, including exact faults instead of general system "suggestions")
Good luck

Posted on Apr 07, 2009


Greg Bernett

  • 2989 Answers

SOURCE: 1998 Jeep Grand Cherokee Laredo 4.oL I got a code po113

Trouble Code: P0113 (4.0L L6 VIN S Auto)
IAT Sensor Circuit High Input Print this code dataprint_icon_codes.gif Number of Trips to Set Code: 1
OBD II Monitor Type: CCM Details
Indicators: MIL Details

Trouble Code Conditions:
Check with ignition on or engine running; battery voltage more than 10v; The PCM detected the IAT Sensor input was over 4.90v (exc. Dakota, Durango, Ram) or 4.98v (Dakota, Durango, Ram) for 3 seconds.

Possible Causes:
  • IAT Sensor signal circuit shorted to VREF (5v)
  • IAT Sensor signal circuit is open, or the ground circuit is open
  • IAT Sensor is damaged or it has failed (an internal open circuit)
  • PCM has failed


Posted on Dec 01, 2009


  • 2926 Answers

SOURCE: 2005 jeep grand cherokee trouble code p2096 change

These conditions MUST be ruled out entirely.
Check for any of the following conditions/mechanical problems.
AIR INDUCTION SYSTEM - must be free from leaks
ENGINE VACUUM - must be at least 13 inches in neutral
ENGINE VALVE TIMING - must be within specifications
ENGINE COMPRESSION - must be within specifications
ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks
ENGINE PCV SYSTEM - must flow freely
TORQUE CONVERTER STALL SPEED - must be within specifications
POWER BRAKE BOOSTER - no internal vacuum leaks
FUEL - must be free of contamination
FUEL INJECTOR - plugged or restricted injector; control wire not connected to correct injector.

Unfortunatly, a scan tool will be required to monitor o2 sensor voltages while the engine is running in closed loop. This code you are displaying is NOT an easy solution to trace down. I expect you had an exhaust leak and is why the cats were replaced? Anyway, if so, the PCM can reset the light after a few GOOD trip readings occur that will satisfy the PCM's no fault signal, otherwise the JEEP dealer is going to be your only solution and a pressure test should be performed.

Posted on Mar 31, 2010


  • 2926 Answers

SOURCE: 2004 jeep grand cherokee overland

P0301 is #1 cylinder misfire detected and is most likely related to a worn spark plug that is need of replacement. All plugs should be replaced if replacing one. Not sure how many miles you have on this vehicle, or if plugs were ever installed, but this is the basic step to take in diagnosis.

Posted on Jun 02, 2010

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