| Code |
Description |
| 11 |
No crank reference signal detected during engine cranking.
Intermittent loss of either camshaft or crankshaft position sensor.
CKP sensor target windows have too much variation.
|
| 12 |
Direct battery input to PCM was disconnected within the last 50 Key-on cycles.
|
| 13 |
No difference recognized between the engine MAP reading and the barometric (atmosphere) pressure reading from start-up.
|
| 14 |
MAP sensor input above or below acceptable voltage.
5 volt output to MAP sensor open.
|
| 15 |
No vehicle speed sensor signal detected during road load conditions.
|
| 17 |
Engine did not reach operating temperature within acceptable limits.
Engine does not reach 20º F. within 5 minutes with a vehicle speed signal.
|
| 21 |
Upstream oxygen sensor response slower than minimum required switching frequency.
Upstream oxygen sensor heating element circuit malfunction.
Downstream oxygen sensor heating element circuit malfunction.
Downstream oxygen sensor input voltage maintained above the normal operating range.
Oxygen sensor voltage too low, tested after cold start. (Upstream or Downstream)
Left oxygen sensor input voltage maintained above the normal operating temperature.
|
| 22 |
Engine coolant temperature sensor above or below acceptable voltage.
|
| 23 |
Intake air temperature sensor input above or below acceptable voltage.
|
| 24 |
Throttle position sensor input above or below acceptable voltage.
TPS signal does not correlate to MAP sensor.
|
| 25 |
A shorted or open condition detected in one or more of the idle air control motor circuits.
Actual idle speed does not equal target idle speed.
|
| 27 |
Injector 3, and/or 4, and/or 5, and/or 6 output driver does not respond properly to the control signal.
|
| 31 |
An open or shorted condition detected in the A/C clutch relay circuit.
Insufficient or excessive vapor flow detected during evaporative emission system operation.
|
| 33 |
An open or shorted condition detected in the duty cycle purge solenoid circuit.
|
| 34 |
An open or shorted condition detected in the Speed Control vacuum or vent solenoid circuits.
Speed control switch input below the minimum acceptable voltage.
|
| 37 |
Auto transmission only!
Relationship between engine speed and vehicle speed indicates no torque converter clutch engagement.
An open or shorted condition detected in the torque converter part throttle unlock solenoid control circuit.
Incorrect input state detected for the Park/Neutral switch.
|
| 41 |
An open or shorted condition in the generator field control circuit.
|
| 42 |
An open or shorted condition detected in the auto shutdown relay circuit.
An open condition detected in the ASD relay output circuit.
An open or shorted condition detected in the fuel pump relay control circuit.
An open circuit between PCM and fuel gauge sending unit.
Circuit shorted to voltage between PCM and fuel gauge sending unit.
No movement of fuel level sender detected.
|
| 43 |
Peak primary circuit current not achieved with maximum dwell time.
Misfire detected in one or more cylinders 1 through 6.
|
| 44 |
Battery temperature sensor in voltage above or below acceptable range.
|
| 46 |
Battery voltage sense input above target charging voltage during engine operation.
|
| 47 |
Battery voltage sense input below target charging during engine operation. Also, no significant change detected in battery voltage during active test of generator output circuit.
|
| 51 |
A lean air/fuel mixture has been indicated by an abnormally rich correction factor.
|
| 52 |
A rich air/fuel mixture has been indicated by an abnormally rich correction factor.
|
| 53 |
PCM internal fault condition detected.
|
| 54 |
No camshaft signal detected during engine cranking.
|
| 55 |
Completion of fault code display on Check Engine lamp.
|
| 63 |
Unsuccessful attempt to write to an EEPROM location by the PCM.
|
| 64 or 72 |
Catalyst efficiency below required level.
|
| 65 |
Power steering high pressure seen at high speed. (2.5L only)
|
| 72 or 64 |
Catalyst efficiency below required level.
|
| 77 |
Malfunction detected with poser feed to speed control servo solenoids.
|
March 18th, 2009 at 1:46 pm
Is there a way to locate someone locally to try this?
March 24th, 2009 at 10:32 pm
The jeep dealership would be your best bet.
December 19th, 2009 at 8:31 am
I find many (all) websites that will list the “Error Codes”, but unfortunately none that offer a comprehensive list of possible solutions or at least things to check for each code. I can’t tell you how frustrating it is to google the error code that you recieve only to find 100+ sites that repeat the list of codes, but don’t offer any possible solutions.
March 27th, 2010 at 1:21 pm
Todd: Unfortunately most of us jeep guys simply don’t have that sort of knowledge to fill out a list of solutions like that. I would suggest taking the error code you found and posting on jeepforum.com for some help. Chances are someone there will be able to help you out with a specific error code problem.
October 17th, 2010 at 6:15 pm
I own a 97 jeep tj. and i did the on off on off on key check. the number 55 came up on the odometer. what does this code mean in laymans terms??
Thank yo very much for your help.
Dan
October 23rd, 2010 at 6:00 am
@ Dan – 55 means the end of the test cycle – done, complete, over. It’s the one code you really want to see if no other codes precede it. Then again, it can be frustrating when you have a problem and hope that the OBDII will enlighten you as to what it may be.
My experience has been that when you just cannot get a DTC to show up on the OBDII, there’s a good chance that it’s something not rigged up to the PCM with a sensor of some sort. This makes narrowing it down mysterious, but gives you some idea of what it may not be. This could save you time and money buying expensive new sensors or other parts that you don’t need yet. Bear in mind that sometimes you will notice a problem before the PCM does and alerts you with a lamp.
October 10th, 2011 at 2:54 pm
How do I get the check engine light to go off after I fixed the problem?
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