P1391 Diagnostic Trouble Code Discussion for April 2020
CKP Or CMP Sensor Signal Intermittent
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| Help Request | Posted | |
| 2002 Dodge Ram 1500 ST 4.7L Poor Idle Quality VIN: 1D7HA18N22 P1391: CKP/CMP sensor signal loss. ... Checked PCM codes and obtained P1391 CKP/CMP sensor signal loss. We had a known good camshaft and crankshaft position sensors handy and we installed them. The problem persisted. Both sensors work by obtaining 5volt reference and ground from the PCM... |
April 30, 2020 |
