what does code P1391 interm loss of CMP & CKP mean?
1546 Views 2 Replies Latest reply: 2017-04-11 02:52:56
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Level 1
(5) points
Comes up on a 2002 Dodge Dakota 3.9L V6. Also showing codes P0152 02 sensor bank 2 sensor 1 sensor circuit high voltage. Along with P0158 sensor bank 2 sensor 2 same high voltage code. Both those O2 sensors were changed on Saturday.Also getting FUEL SYS 1 and 2 show OL fault. All 6 injector replaced with new ones.Getting also a purge monitor fail IAC. The IAC switch was changed two weeks ago.Tags: problems
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Level 7
(1473) points
P1391 Means just what you wrote, an intermittent loss of either the cam or crank signals. Both common failures on that engine. It is best diagnosed with a lab scope. As for the O2 codes, if they were not present before swapping injectors, I would confirm that you installed the correct injectors. The wrong injectors could cause a rich (or lean) condition. Kevin -
Level 7
(1473) points
P1391 Means just what you wrote, an intermittent loss of either the cam or crank signals. Both common failures on that engine. It is best diagnosed with a lab scope. As for the O2 codes, if they were not present before swapping injectors, I would confirm that you installed the correct injectors. The wrong injectors could cause a rich (or lean) condition. Kevin
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