HOW TO: Determine what errors a check engine light represent

Discussion in 'How To' started by Bennett, Dec 10, 2004.

  1. fouros

    fouros Full Access Member

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    you got it marlon
     
  2. tjkj2002

    tjkj2002 Full Access Member

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    No it will not,if it is a hard fault that is not fixed it will not be erased by disconnecting the battery,though the light may be off.The code will still be in the PCM even if it isn't a hard fault code,it will be stored as a historical code and will play havoc on someone trying to diag your vehicle for a major problem.

    I am not sure,it ranges from 10-100 key-on/key-off cycles for a corrected fault to turn off the light by itself.
     
  3. 04Liberty

    04Liberty Full Access Member

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    I just plugged the Superchips from my Ram into my wife's Libby. If you only use the code reader/reset feature, you won't mess anything up. Just don't try to reprogram the Liberty with the Hemi program...
     
  4. eebee

    eebee New Member

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    07 Liberty

    Does anyone know how to check the codes on the '07? I've tried the methods described here but nothing comes up. Maybe I'm doing something wrong?
     
  5. hyde

    hyde Moderator KJ Supporting Member

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    Fixed the table above...

    CODE ---> WHAT IT MEANS
    30 ---> Sensor heater relay problem
    36 ---> Sensor heater relay problem
    106 ---> MAP sensor voltage out of range detected at startup
    107 ---> MAP sensor voltage too low
    108 ---> MAP sensor voltage too high
    112 ---> Intake air temperature sensor voltage low
    113 ---> Intake air (charge) temperature sensor voltage high
    116 ---> Coolant temparature sensor reading doesn't make sense
    117 ---> Engine coolant temperature sensor voltage low
    118 ---> Engine coolant temperature sensor voltage high
    121 ---> Throttle position sensor and MAP sensor disagree with each other
    122 ---> Throttle position sensor voltage low
    123 ---> Throttle position sensor voltage high
    125 ---> Taking too long to reach proper operating temparature and switch to energy-efficient mode
    129 ---> Bad barometric pressure sensor (thanks, John King)
    130 ---> Sensor heater relay problem
    131 ---> Oxygen sensor seems to be shorted out or broken
    147 ---> Oxygen sensor heater element not working properly (this device helps to reduce emissions more quickly)
    151 ---> Oxygen sensor voltage problem - short circuit to ground?
    152 ---> Oxygen sensor voltage problem - short circuit to active 12V?
    153 ---> Oxygen sensor response too slow
    154 ---> Oxygen sensor does not show either a rich or lean condition - may need replacement
    155 ---> Oxygen sensor heater element not working properly (this device helps to reduce emissions more quickly)
    157 ---> Oxygen sensor voltage problem - short circuit to ground?
    158 ---> Oxygen sensor voltage problem - short circuit to active 12V?
    159 ---> Oxygen sensor response too slow
    160 ---> Oxygen sensor does not show either a rich or lean condition - may need replacement
    161 ---> Oxygen sensor heater element not working properly (this device helps to reduce emissions more quickly)
    171 ---> The oxygen sensor is saying that the system air/fuel mix is far too lean (too much fuel is being added as a correction).
    172 ---> The oxygen sensor is saying that the system air/fuel mix is far too rich (too much air is being added as a correction).
    174 ---> The oxygen sensor is saying that the system air/fuel mix is far too lean (too much fuel is being added as a correction).
    175 ---> The oxygen sensor is saying that the system air/fuel mix is far too rich (too much air is being added as a correction).
    176 ---> Flex fuel sensor can't be seen
    178 ---> Flex fuel sensor problem
    179 ---> Flex fuel sensor problem
    182 ---> Compressed natural gas temperature sensor problem
    183 ---> Compressed natural gas temperature sensor problem
    201 ---> Injector #1 control circuit problem (open or shorted)
    202 ---> Injector #2 control circuit problem (open or shorted)
    203 ---> Injector #3 control circuit problem (open or shorted)
    204 ---> Injector #4 control circuit problem (open or shorted)
    205 ---> Injector #5 control circuit problem (open or shorted)
    206 ---> Injector #6 control circuit problem (open or shorted)
    207 ---> Injector #7 control circuit problem (open or shorted)
    208 ---> Injector #8 control circuit problem (open or shorted)
    209 ---> Injector #9 control circuit problem (open or shorted)
    210 ---> Injector #10 control circuit problem (open or shorted)
    300 ---> Misfire detected in multiple cylinders.
    301 ---> Misfire detected in cylinder #1.
    302 ---> Misfire detected in cylinder #2.
    303 ---> Misfire detected in cylinder #3.
    304 ---> Misfire detected in cylinder #4.
    305 ---> Misfire detected in cylinder #5.
    306 ---> Misfire detected in cylinder #6.
    307 ---> Misfire detected in cylinder #7
    308 ---> Misfire detected in cylinder #8.
    309 ---> Misfire detected in cylinder #9.
    310 ---> Misfire detected in cylinder #10.
    320 ---> Crankshaft position sensor reference signal cannot be found while the engine is cranking.
    325 ---> Knock sensor (#1) signal is wrong.
    330 ---> Knock sensor (#2) signal is wrong.
    340 ---> No camshaft signal being received by the computer
    350 ---> A coil is drawing too much current.
    351 ---> Coil #1 is not reaching peak current at the right time
    352 ---> Coil #2 is not reaching peak current at the right time
    353 ---> Coil #3 is not reaching peak current at the right time
    354 ---> Coil #4 is not reaching peak current at the right time
    355 ---> Coil #5 is not reaching peak current at the right time
    356 ---> Coil #6 is not reaching peak current at the right time
    357 ---> Coil #7 is not reaching peak current at the right time
    358 ---> Coil #8 is not reaching peak current at the right time
    401 ---> A required change in air/fuel mixture was not detected during diagnostic test.
    403 ---> An problem was detected in the EGR solenoid control circuit.
    404 ---> The EGR sensor's reported position makes no sense
    405 ---> EGR position sensor voltage wrong.
    406 ---> EGR position sensor voltage wrong.
    412 ---> The secondary air solenoid control circuit seems bad (this is used for the aspirator).
    420 ---> The catalyst seems inefficient (#1).
    432 ---> The catalyst seems inefficient (#2).
    441 ---> Evaporative purge flow system not working properly
    442 ---> A leak has been detected in the evaporative system! JeepKJ Note:Check your gas cap
    443 ---> Evaporative purge flow system solenoid not working properly
    455 ---> A large leak has been detected in the evaporative system!
    456 ---> A small leak has been detected in the evaporative system!
    460 ---> The fuel level sender is not reporting any change over a long distance. Something seems wrong.
     
  6. hyde

    hyde Moderator KJ Supporting Member

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    461 ---> The fuel level sender is not reporting any change over a long time. Something seems wrong.
    462 ---> Fuel level sender voltage wrong.
    463 ---> Fuel level sender voltage wrong.
    500 ---> Haven't heard from the speed sensor lately.
    505 ---> The idle speed air control motor doesn't seem to be working correctly.
    522 ---> Oil pressure sensor problems
    523 ---> Oil pressure sensor problems
    551 ---> The power steering switch may not be working. (Neons: high pressure is showing up at high speed)
    600 ---> Oh-oh! The coprocessors aren't talking to each other within the computer!
    601 ---> Internal computer error!
    604 ---> Internal computer error! (RAM check)
    605 ---> Internal computer error! (ROM)
    615 ---> Starter relay circuit problem
    622 ---> Generator field control problem
    645 ---> A/C clutch relay circuit problem.
    700 ---> The automatic transmission computer or Aisin computer has a problem - ask it what's going on. I don't know.
    703 ---> Brake switch circuit information seems wrong.
    711 ---> Based on the transmission temperature and its operations, it looks like the transmission temperature sensor's gone bad.
    712 ---> Transmission fluid temperature sensor voltage wrong.
    713 ---> Transmission fluid temperature sensor voltage wrong.
    720 ---> The Output Shaft Speed Sensor doesn't match the reported vehicle speed.
    740 ---> The engine's running faster than it should for these speeds, so I think thetorque convertor clutch lock-up system is bad
    743 ---> Torque converter clutch (part throttle unlock) solenoid circuit problem - shift solenoid C electrical fault
    748 ---> Governor Pressure Solenoid circuit problem (Transmission relay circuit problem in Jeep RE transmissions)
    751 ---> Overdrive override switch has been pressed for over five minutes. Just thought you should know.
    753 ---> Overdrive solenoid control circuit problem (transmission relay circuit in Jeep RE transmissions.)
    756 ---> Shift solenoid B (2-3) fault
    783 ---> The overdrive solenoid can't go from 3rd gear to the overdrive gear.
    801 ---> Transmission reverse gear lockout solenoid circuit problem!
    833 ---> Problem with the clutch-released switch circuit?
    1192 ---> Inlet air temperature sensor voltage is wrong
    1193 ---> Inlet air temperature sensor voltage is wrong
    1194 ---> Oxygen sensor heater performance is faulty
    1195 ---> Oxygen sensor is slow
    1196 ---> The oxygen sensor switched too slowly (bank 2).
    1197 ---> The oxygen sensor switched too slowly (bank 1).
    1198 ---> Radiator coolant temperature sensor voltage is wrong.
    1199 ---> Radiator coolant temperature sensor voltage is wrong.
    1281 ---> The engine is staying cold too long - check your thermostat.
    1282 ---> The fuel pump relay circuit seems to be having a problem.
    1288 ---> The intake manifold short runner tuning valve circuit seems to be having a problem.
    1289 ---> There's a problem in the manifold tuning valve solenoid control circuit.
    1290 ---> Compressed natural gas system pressure is too high
    1291 ---> The heated air intake sensor does not seem to be working.
    1292 ---> Natural gas pressure sensor issue
    1293 ---> Natural gas pressure sensor issue
    1294 ---> Can't get to target engine speed, check for vacuum leaks and idle speed motor issues.
    1295 ---> The throttle position sensor doesn't seem to be getting enough electricity.
    1296 ---> The MAP sensor doesn't seem to be getting enough electricity.
    1297 ---> The MAP sensor doesn't change its reading when the engine is running!
    1298 ---> During wide-open throttle, the engine runs lean.
    1299 ---> MAP Sensor and Throttle Position Sensor signals don't match, check for a vacuum leak.
    1388 ---> Auto shutdown relay circuit problems?
    1389 ---> No Z1 or Z2 voltage seen by the computer when the auto shutdown relay is used.
    1390 ---> Cam and crank signals don't match - did the timing belt skip a tooth?
    1391 ---> Sometimes, I can't see the crank or cam sensor signal.
    1398 ---> I can see the Crank Sensor's signal when I prepare for Misfire Diagnostics. Try replacing it.
    1399 ---> Problem in the Wait to Start Lamp circuit - (diesels only?)
    1403 ---> EGR position sensor not getting (enough) voltage.
    1476 ---> Too little secondary air injection during aspirator test.
    1477 ---> Too much secondary air injection during aspirator test.
    1478 ---> Battery temperature sensor voltage wrong.
    1479 ---> Transmission fan relay circuit problems?
    1480 ---> PCV solenoid circuit problems?
    1481 ---> Transmission RPM pulse generator signal for misfire detection seems wrong.
    1482 ---> Catalyst temperature sensor circuit shorted low.
    1483 ---> Catalyst temperature sensor circuit shorted high.
    1484 ---> The catalyst seems to be overheating!
    1485 ---> Air injection solenoid circuit problems.
    1486 ---> Pinched or blocked hose in the evaporative hose system.
    1487 ---> Control circuit of the #2 high-speed radiator fan control relay is having problems.
    1488 ---> Auxiliary 5-volt sensor feed is too low.
    1489 ---> High speed radiator fan control circuit problem.
    1490 ---> Low speed radiator fan control circuit problem.
    1491 ---> Radiator fan control circuit problem (may be solid state relays as well as other circuits).
    1492 ---> Ambient or battery temperature sensor voltage wrong
    1493 ---> Ambient or battery temperature sensor voltage wrong
    1494 ---> Leak Detection Pump (LDP) pressure switch problem - electrical or the pump itself.
    1495 ---> Leak Detection Pump (LDP) pressure switch problem - the solenoid circuit.
    1496 ---> Sensor feed is below an acceptable limit. (under 4v for 4 seconds - should be 5v).
    1498 ---> High speed radiator fan control circuit problem. (#3 control relay)
    1594 ---> Voltage too high in charging system.
    1595 ---> Speed control vacuum or vent solenoid control circuits shorted or lost.
    1596 ---> Speed control switch always high
    1597 ---> Speed control switch always low
    1598 ---> A/C pressure sensor voltage high
    1599 ---> A/C pressure sensor voltage low
    1681 ---> No messages received from the cluster control module (dashboard computer).
    1682 ---> Charging system doesn't seem to be working well. Check alternator, etc.
    1683 ---> Speed control servo power control circuit problem.
    1684 ---> The battery has been disconnected within the last 50 starts.
    1685 ---> Invalid key received from the Smart Key Immobilizer Module.
    1686 ---> No messages received from the Smart Key Immobilizer Module.
    1687 ---> No messages received from the Mechanical Instrument Cluster module.
    1 693 ---> The companion engine control module has shown a fault.
    1694 ---> No messages received from the powertrain control module-Aisin transmission.
    1695 ---> No messages received from the body control module.
    1696 ---> Unsuccessful attempt to write to an EEPROM location!
    1697 ---> Unsuccessful attempt to update Service Reminder Indicator (SRI or EMR) mileage!
    1698 ---> No messages received from the electronic transmission control module or the Aisin transmission controller.
    1719 ---> Transmission 2-3 gear lockout solenoid control circuit problem.
    1740 ---> Either the tcc solenoid or overdrive solenoid systems doesn't seem to be making much sense.
    1756 ---> Transmission control pressure not equal to target. (Mid pressure problem)
    1757 ---> Transmission control pressure not equal to target. (Zero pressure problem)
    1762 ---> The Governor Pressure Sensor input was too high or too low for 3 consecutive park/neutral calibrations.
    1763 ---> The Governor Pressure Sensor input is too high
    1764 ---> The Governor Pressure Sensor input is too low.
    1765 ---> Open or short in the Transmission Relay control circuit.
    1899 ---> The Park/Neutral switch seems to be stuck!
     
  7. Daveincllc

    Daveincllc New Member

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    02 sensor

    No its a plug in front of the cat. and you unscrew it and plug the new on in
     
  8. scarlet

    scarlet New Member

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    Codes

    Maybe I checked mine wrong. At first it came up with an 8 then it went to 06-08. Then I tried it again and I got 174.5 ???????
     
  9. davin24

    davin24 New Member

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    I also got a 6.0..... does that mean anything?
     
  10. Drucifer

    Drucifer Full Access Member

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    Is the above online somewhere? P0038
     
  11. Corwyyn

    Corwyyn Full Access Member

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    P0038
    02 Sensor Heater Control Circuit High (Bank 1 Sensor 2)

    Shorted condition detected in the oxygen sensor heater element control feedback sense circuit.

    Found it in a list on a site for WJs (but I believe the codes are the same for all Jeep models).
     
  12. Atrus

    Atrus Full Access Member

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    Found the same site on my search. TJKJ can correct me if I am wrong, but these trouble codes aren't even mfg specific, I think they are OBD-II standard.

    I think it's a bad O2. I'd get the code cleared and see if it comes back. Sometimes the O2 will just bounce out of range to trigger a CEL, but it still is functioning OK.
     
  13. Drucifer

    Drucifer Full Access Member

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    How I do that?
     
  14. Atrus

    Atrus Full Access Member

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    I think Autozone can do it. Most scanners have an option to clear the CEL and the code from history.

    I have an Autotap scantool, so I use that.
     
  15. mikes07kj

    mikes07kj Full Access Member

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    I tried cycling the key on and off holding the trip reset button, the only thing that happened was sets of #'s that came up. 666666 then 777777 thru 999999 and then the miliage came up. Is this normal?
     
  16. Drucifer

    Drucifer Full Access Member

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    What's with this holding? I didn't hold anything.
     
  17. mikes07kj

    mikes07kj Full Access Member

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    I thought I had to push in the trip button and hold it in while cycling the key.
     
  18. mikes07kj

    mikes07kj Full Access Member

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    OK had to re-read first part of post, hold the trip reset button then turn key to ON position and release button. I read this last night and din't try it till tonight, my bad. I try it again later.
     
  19. Smeltn

    Smeltn New Member

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    Check engine light came on today on my '05 Libby... I did the method the OP posted and got code P0456. Going by the list it says Small Leak in Evaporative system.

    Is this common? Is it hard to fix? Is it ok to drive? Can it do damage?

    And of course lastly is, can I get rid of the check engine light and drive with it?
     
  20. tjkj2002

    tjkj2002 Full Access Member

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    Check the gas cap,may have a bad seal.Also look at the EVAP canister,the large black box by the gas tank,for any cracked hoses going to it.

    For the most part most OBDII codes are universal but there are manufacturer and vehicle specific OBDII codes.Vipers are one example of a vehicle that has many OBDII codes that only pertain to it and no other vehicle.