2002 Jeep Grand Cherokee Codes saying injector circuit open

2002 JEEP GRAND CHEROKEE
4.7L • V8 • 4WD • AUTOMATIC
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JIMSAUTO
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Working on a 2002 Jeep Grand Cherokee Laredo which has several codes coming up to which I know some of the causes (ie cps, large leak in evap detected and small leak detected). The other codes showing are P0201 through P0208 and says injector 1-8 open circuit. If all 8 injectors are having an open circuit condition then I would think that at the very least it would have trouble starting, yet it starts right up and runs fairly smooth. just wondering what might cause these codes and and allow the engine to run fairly normal.
Aug 26, 2014 at 8:45 PM
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HMAC300
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check batter forcondition including load test autoparts does for free. these may be false codes. check fuel pressure with a gauge shold be 44.2-54.2psi key on engine off this cold be a pcm as well though or a short from injectors to pcm harness
Aug 27, 2014 at 6:23 AM
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JIMSAUTO
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I checked the fuel pressure already and was at 49 psi. It has code for cam sensor and gross leak in evap. On the evap I can hear the vacuum leak at driverside rear so I know that one is correct. Since vehicle was still running I was wondering if the other codes may be intermittent or false, don't like replacing parts that are not the actual cause. guess I'll have to start tracing and testing to try and figure out what is going on with it then. thanks
Aug 27, 2014 at 5:00 PM
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JIMSAUTO
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And had also just replaced battery due to a bad battery, checked alternator which is charging properly.
Aug 27, 2014 at 5:03 PM
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HMAC300
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could be a bad pcm too. a pro willneed to install it to program to your vehicle
Aug 28, 2014 at 5:32 AM
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