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2002 Dodge Ram 1500 ST 4.7L Poor Idle Quality
Posted to Chrysler Driveability on 4/30/2020 9 Replies

Truck came in with rough idle problem. 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...

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car Vehicle Data

2002 Dodge Ram 1500 ST

VIN 1D7HA18N22
Engine4.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality
OccursAlways

Trouble Codes

P1391CKP Or CMP Sensor Signal Intermittent
Open Help Request

car Vehicle Data

2002 Dodge Ram 1500 ST

VIN 1D7HA18N22
Engine4.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality
OccursAlways

Trouble Codes

P1391CKP Or CMP Sensor Signal Intermittent