ericksonjse Posted December 12, 2007 Report Share Posted December 12, 2007 I am getting code P0155 (HO2S malfunction bank 2, sensor 1) and P0300 (random Misfire) no other codes on current. The car is also running rough and I am hearing a tick (valve?). Other details. I have the normal (so I've heard) using of oil of a 1/2 a quart of oil per tank of gas. Mileage is 105,000 (I have owned it since 97,000 miles) I had a remote starter (comstar) put in last week and the check engine light came on. I asked the installer about it and said it was normal and would go away after 100 turn overs. He had missed connecting the accessories wire, which resulted in the traction control light coming on and when you remote started the car, it didn't blow heat. Took it in today to have it fixed. On the way, the check engine light started to blink and the engine started to run rough, so I went to a gas station to check the oil - his hookup also affected the oil low warning, I was two quarts low!. I added the oil and proceeded to his shop to get the remote started fixed. Now that all went fine, the traction control light went away and everything else works. But I still have the rough running, so I checked the codes and it gave me the P0155 and P0300. Could the problem still be related to the remote starter? or do I have a bad sensor and thats also resulting in the misfire? or are the two codes separate issues. Also - put gas in the car this morning - could this all be just bad gas? or Injectors plugged? If I use an injector cleaner, could that help with this sensor malfunction? Anybody got a clue? Jenelle Link to comment Share on other sites More sharing options...
TDK Posted December 12, 2007 Report Share Posted December 12, 2007 Jenelle97Eldorado, You have done well to read the diagnostic codes first and include them in a literal posting, congratulations! The P0155 code refers to one of two Oxygen sensors. I believe they affect the fuel/air mixture and timing along with a number of other subtle but important adjustments. The remote starter guy could have knocked an O2 sensor wire loose and not realized it. This could also cause the random misfire code as well. I would avoid using any injector cleaner just right now, as they have ruined some fuel pumps. Unless you have changed to some cheap gas, it seems logical to me anyway - to concentrate on the recent remote starter work for a bit longer. Unfortunately, I have not heard about a lot of success regarding after-market remote starter installations, in particular with a highly-computerized car like a Caddy. As an example of non-confidence of installation or equipment, I find it amazing that the low oil warnig light would be affected in any manner. Granted, two quarts low on oil might set off a code, but others might know better on this aspect. Other issues like the traction control problem and no heat were also obvious screw-ups - that may have been related to battery cable or power connection problems. Caddys like good clean electrical power for all the sensors and data transmission. Any mis-routed wires over critiacl equipment can also cause interferance and even failure, (for example; between spark plug wires and the HVAC blower control module). I hate to suggest this, but at some point you may want the remote start disconnected - to at least verify that it is not the problem. Good luck, Add power to leave problems behind. Most braking is just - poor planning. Link to comment Share on other sites More sharing options...
ericksonjse Posted December 12, 2007 Author Report Share Posted December 12, 2007 Jenelle97Eldorado, You have done well to read the diagnostic codes first and include them in a literal posting, congratulations! The P0155 code refers to one of two Oxygen sensors. I believe they affect the fuel/air mixture and timing along with a number of other subtle but important adjustments. The remote starter guy could have knocked an O2 sensor wire loose and not realized it. This could also cause the random misfire code as well. I would avoid using any injector cleaner just right now, as they have ruined some fuel pumps. Unless you have changed to some cheap gas, it seems logical to me anyway - to concentrate on the recent remote starter work for a bit longer. Unfortunately, I have not heard about a lot of success regarding after-market remote starter installations, in particular with a highly-computerized car like a Caddy. As an example of non-confidence of installation or equipment, I find it amazing that the low oil warnig light would be affected in any manner. Granted, two quarts low on oil might set off a code, but others might know better on this aspect. Other issues like the traction control problem and no heat were also obvious screw-ups - that may have been related to battery cable or power connection problems. Caddys like good clean electrical power for all the sensors and data transmission. Any mis-routed wires over critiacl equipment can also cause interferance and even failure, (for example; between spark plug wires and the HVAC blower control module). I hate to suggest this, but at some point you may want the remote start disconnected - to at least verify that it is not the problem. Good luck, I am going to start with checking the sensor and see if its loose etc. It ran fine for about a week after the Remote starter was installed and the day I was going to have it in for the accessories to be wired was when it started acting up (literally on the way there the problem started). I am in Minnesota so its cold and crappy out and could easily see something affecting that sensor - its located in front below the dipstick. Jenelle Link to comment Share on other sites More sharing options...
Logan Posted December 12, 2007 Report Share Posted December 12, 2007 Jenelle97Eldorado, You have done well to read the diagnostic codes first and include them in a literal posting, congratulations! The P0155 code refers to one of two Oxygen sensors. I believe they affect the fuel/air mixture and timing along with a number of other subtle but important adjustments. The remote starter guy could have knocked an O2 sensor wire loose and not realized it. This could also cause the random misfire code as well. I would avoid using any injector cleaner just right now, as they have ruined some fuel pumps. Unless you have changed to some cheap gas, it seems logical to me anyway - to concentrate on the recent remote starter work for a bit longer. Unfortunately, I have not heard about a lot of success regarding after-market remote starter installations, in particular with a highly-computerized car like a Caddy. As an example of non-confidence of installation or equipment, I find it amazing that the low oil warnig light would be affected in any manner. Granted, two quarts low on oil might set off a code, but others might know better on this aspect. Other issues like the traction control problem and no heat were also obvious screw-ups - that may have been related to battery cable or power connection problems. Caddys like good clean electrical power for all the sensors and data transmission. Any mis-routed wires over critiacl equipment can also cause interferance and even failure, (for example; between spark plug wires and the HVAC blower control module). I hate to suggest this, but at some point you may want the remote start disconnected - to at least verify that it is not the problem. Good luck, I am going to start with checking the sensor and see if its loose etc. It ran fine for about a week after the Remote starter was installed and the day I was going to have it in for the accessories to be wired was when it started acting up (literally on the way there the problem started). I am in Minnesota so its cold and crappy out and could easily see something affecting that sensor - its located in front below the dipstick. Jenelle Aftermarket remote start modules and Cadillacs with OBDII do not mix well. "Problem will go away after 100 key cycles"....yeah right. If you have a remote start put in, typically they work for about a year before the electrical gremlins sneak in. Yours came early. Logan Diagnostic LLC www.airbagcrash.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
ericksonjse Posted December 12, 2007 Author Report Share Posted December 12, 2007 Just an update. Can't get a hold of the remote starter installer. Seems to be unreliable - great . Went to a professional car stereo/remote starter installer and this is my payback.. Tomorrow my 7 day money back guarantee is up and I think I will have to return the remote starter if he cannot get it hooked up properly. The P0155 code is now registering in history instead of current, so the only code now is P0300, I am also smelling anti-freeze when the car is warmed up. Link to comment Share on other sites More sharing options...
Ranger Posted December 13, 2007 Report Share Posted December 13, 2007 A flashing SES light is a "severe misfire" warning. Check your owners manual. The light will go out after 3 ignition cycles if the fault has not been detected again, then will be cleared from history after 50 ignition cycles if it does not reoccur and you do not clear it manually. Where is the coolant smell coming from? If it is coming from the exhaust, then it is likely a bad head gasket and would cause a misfire. If not, then it is an external cooling system leak that needs to be located and fixed. Link to comment Share on other sites More sharing options...
ericksonjse Posted December 13, 2007 Author Report Share Posted December 13, 2007 A flashing SES light is a "severe misfire" warning. Check your owners manual. The light will go out after 3 ignition cycles if the fault has not been detected again, then will be cleared from history after 50 ignition cycles if it does not reoccur and you do not clear it manually. Where is the coolant smell coming from? If it is coming from the exhaust, then it is likely a bad head gasket and would cause a misfire. If not, then it is an external cooling system leak that needs to be located and fixed. The coolant smell is from the engine compartment. I noticed also when driving yesterday - I heard a whistling noise - not super high pitch, maybe a Vacuume hose leak? Trying to get a hold of the installer, left him a message last night that he needs to take another look at what he did during install and that if I didn't hear from him by today, that I was returning the remote starter. $400 piece of crap that probably is causing $2,000 worth of damage. Link to comment Share on other sites More sharing options...
ericksonjse Posted December 13, 2007 Author Report Share Posted December 13, 2007 A flashing SES light is a "severe misfire" warning. Check your owners manual. The light will go out after 3 ignition cycles if the fault has not been detected again, then will be cleared from history after 50 ignition cycles if it does not reoccur and you do not clear it manually. Where is the coolant smell coming from? If it is coming from the exhaust, then it is likely a bad head gasket and would cause a misfire. If not, then it is an external cooling system leak that needs to be located and fixed. The coolant smell is from the engine compartment. I noticed also when driving yesterday - I heard a whistling noise - not super high pitch, maybe a Vacuume hose leak? Trying to get a hold of the installer, left him a message last night that he needs to take another look at what he did during install and that if I didn't hear from him by today, that I was returning the remote starter. $400 piece of crap that probably is causing $2,000 worth of damage. Got a hold of the installer, I am taking the car back to him tomorrow and he is going to trace all wiring for the remote start and also work with Compustar tech support to try and correct the issue. I am hoping this will take care of the problem and not cost me an arm and leg to fix if its something else coincidentally. Link to comment Share on other sites More sharing options...
Ranger Posted December 14, 2007 Report Share Posted December 14, 2007 You are going to have to narrow down where this noise and coolant smell are coming from so we can help you. A vacuum leak would likely cause a high idle. The noise could be the water pump (thus leak) or the pump belt tensioner among several other possibilities. Link to comment Share on other sites More sharing options...
ericksonjse Posted December 14, 2007 Author Report Share Posted December 14, 2007 You are going to have to narrow down where this noise and coolant smell are coming from so we can help you. A vacuum leak would likely cause a high idle. The noise could be the water pump (thus leak) or the pump belt tensioner among several other possibilities. The problem has been solved. I took the car in to the place that installed the remote starter this morning to have them trace their wiring etc. Within an hour I get a call from him and he said the cover to the remote starter module had crimped a spark plug wire. He said he had the car running when he removed the cover and it was arcing badly. He fixed that and rechecked the codes and no more errors are going off, and the check engine light is now off. Drove it home and she ran great with no further problems. Link to comment Share on other sites More sharing options...
Ranger Posted December 14, 2007 Report Share Posted December 14, 2007 It sounds as though the cover cut the insulation on the plug wire, in which case I would hope they replaced it rather than taped it or worse yet, just uncrimped it. Link to comment Share on other sites More sharing options...
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