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Mar 29, 2015 · 7 Posts
Discussion Starter · #1 ·
Mar 29, 2015 I have a 2002 Jeep Grand Cherokee that will not start when it is above 60 degrees oitside. When it is below 60 it has no problems at all starting... I have been told by several people that it may be my Crankshaft Position Sensor. Does anyone have any suggetions as to what else may be causeing this or a way to test the CPS? Joined Dec 18, 2009 · 8,310 Posts
Welcome to the garage. Joined Mar 29, 2015 · 7 Posts
Discussion Starter · #3 · Mar 30, 2015 About 2 months ago the check engine light came on took it to oreilly's and codes came up for evap leak and crankshaft sensor they reset codes though because it was running good. Done does appear on the odometer and it runs fine when the engine is hot just not when it is nice outside. It seems that as long as it is around 50-55 or lower outside it
has no problems. As soon as the weather gets nice it acts up. Sometimes will die on me while it is running but as long as its cold outside starts right back up. If its nice outside I am stranded.
Joined Dec 18, 2009 · 8,310 Posts
I wonder if it will be the crank sensor. Why would the sensor not give a problem when the engine is hot (so the sensor as well) and outside temps below the 60's. Many times these sensors give problems when hot. If you have an android phone, then you could buy a cheap ELM327 bluetooth dongle (e bay or amazon) and download the free app Torque. Then you can
monitor many sensor outputs and see if any of them is out of line. Joined Mar 29, 2015 · 7 Posts
Discussion Starter · #5 · Mar 30, 2015 Checked it out again today and an error code came up it is saying p0230 what could this b Joined Dec 18, 2009 · 8,310 Posts
The P0230 code stands for a primary fuel pump circuit malfunction. This can be a problem with the fuel pump relay, wiring, ground contact or the PCM. Joined Mar 29, 2015 · 7 Posts
Discussion Starter · #7 · Mar 31, 2015 I was wrong about the code I got 2 numbers wrong. Instead of p0230 it was p0320 so I am going to change the crankshaft position sensor today. Wish me luck and thank you for the feedback! Joined Mar 29, 2015 · 7 Posts
Discussion Starter · #8 · Mar 31, 2015 Got the crankshaft position sensor change running now seems to be running good but now error code p0340 is coming up. Camshaft position sensor, do u usually have to change both when changing one of them?
Joined Dec 18, 2009 · 8,310 Posts
There are people who say yes, but just because their way of thinking is, that if one is bad, the other will not be far away from getting bad as well. But there should be no reason to change the cam sensor, or when it is bad ofcourse. Strange that after the change that you get this code now. Did you try to reset first and see if it comes back? Joined Mar 29, 2015 · 7 Posts
Discussion Starter · #10 · Apr 2, 2015 Yes I have reset it twice now and it runs fine afterwards for about ten minutes then the same code comes back and it starts to feel like it is misfiring once I get up to about fourty five mph or higher or when I am stoped at a spop sign/light.
Joined Dec 18, 2009 · 8,310 Posts
Did you put a MOPAR sensor in? Aftermarket sensors can give strange behaviour. Which engine do you have? Joined Mar 29, 2015 · 7 Posts
Discussion Starter · #12 · Apr 3, 2015 No it was a duralast brand. Good thing is that it has a lifetime waranty so I am going to go aee if they will give me a new one tomorrow and c if that does it. It is a straight six best truck I have eves had with the exception of these dmn sensors
Joined Dec 18, 2009 · 8,310 Posts
For some strange reason you can get the cam sensor message, while the crank sensor can be the problem. So indeed i would try an other crank sensor first. What are the symptoms of a failing crankshaft position sensor?Symptoms of a Bad or Failing Crankshaft Position Sensor. Issues Starting the Vehicle.. Intermittent Stalling.. Check Engine Light Comes On.. Uneven Acceleration.. Engine Misfires or Vibrates.. Rough Idle and/or Vibrating Engine.. Reduced Gas Mileage.. How do you reset a crankshaft position sensor?Resetting Crank Sensor Without A Scanner. Switch off the accessories. ... . Now, let the engine be idle in Neutral or Park position for 2 minutes. ... . At part throttle, accelerate your car to 55 mph. ... . Even after that, cruise at the same speed for another 5/6 minutes.. Can you drive with a messed up crankshaft sensor?Can I Start the Vehicle with a Bad Crank? If you wonder if it is safe to start your car when the crankshaft goes, the answer is yes if it is the very beginning of the issue. Once the position sensor becomes compromised or if you have symptoms of a problematic crankshaft that you can't ignore, do not drive your vehicle.
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