P0315 - Crankshaft Position System Variation Not Learned

4-54 Powertrain DTC Charts and Descriptions

Diagnostic Trouble Code (DTC) Charts and Descriptions

P0315 - Crankshaft Position System Variation Not Learned (Continued)

Diagnostic Aids: Requires visual inspection of the CKP sensor and the crankshaft pulse wheel teeth for damage.

Application Key On Engine Off Key On Engine Running Continuous Memory

Edge, Refer to the Description, Possible Causes and Diagnostic Aids for the DTC. F-150, Fiesta 1.0L, Fiesta 1.6L GTDI, Focus, KA, MKC, Mustang, Transit

All others GO to Pinpoint Test HD.

P0316 - Misfire Detected On Startup (First 1000 Revolutions)

Description: This DTC sets in addition to any type B misfire DTC which occurs in the first 1,000 revolution test interval

following engine start.

Possible Causes: • Damaged crankshaft position (CKP) sensor

• Damaged ignition system

• Damaged fuel injectors

• Running out of fuel

• Fuel quality

• Base engine

• Damaged PCM

Diagnostic Aids: Freeze frame data and the DTC P03xx are also stored, indicating which cylinder the misfire occurred.

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test HD.

P0320 - Ignition/Distributor Engine Speed Input Circuit

Description: This DTC sets when several erratic profile ignition pickup (PIP) pulses have occurred in the crankshaft position

(CKP) sensor signal within a calibrated time period when the camshaft speed exceeds the equivalent speed of engine idle.

Possible Causes: • CKP+ circuit intermittent open (VR type)

• CKP- circuit intermittent open (VR type)

• CKP circuit intermittent open (Hall effect)

• VREF circuit intermittent open (Hall effect)

• SIGRTN circuit intermittent open (Hall effect)

• CKP+ circuit intermittent short to voltage (VR type)

• CKP- circuit intermittent short to voltage (VR type)

• CKP circuit intermittent short to voltage (Hall effect)

• VREF circuit intermittent short to voltage (Hall effect)

• SIGRTN circuit intermittent short to voltage (Hall effect)

• CKP+ circuit intermittent short to ground (VR type)

• CKP- circuit intermittent short to ground (VR type)

• CKP circuit intermittent short to ground (Hall effect)

• VREF circuit intermittent short to ground (Hall effect)

• SIGRTN circuit intermittent short to ground (Hall effect)

• CKP sensor incorrectly installed

• Damaged CKP sensor

• Incorrect, damaged or corroded connections

• Arcing secondary ignition components (coil, wires and plugs)

• Arcing relays or other high current devices (cooling fan or starter motor)

• On board 2 way radio transceiver

• Radio frequency interference or electromagnetic interference from an external source

• Improperly grounded high power aftermarket equipment

Diagnostic Aids:

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test A.

2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015