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DTC P16F3 - LNP or LNQ

This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM) and the throttle actuator control (TAC) system. This diagnostic also addresses if the ECM is not programmed.

The ECM monitors its ability to read and write to the memory. It also monitors a timing function. The ECM and the TAC processors are used to monitor the TAC system data. Both processors monitor the other processors data to verify that the indicated accelerator pedal position (APP) calculation is correct. The ECM performs an intrusive test in order to confirm that the APP signals are not shorted together. The ECM accomplishes this by pulling the APP sensor 2 low momentarily and looking for sensor 1 to also be pulled low.

The ECM detects an internal malfunction or incomplete programming for more than 10 s.

DTC P16F3 00 is a Type C DTC

DTC P16F3 00 is a Type C DTC

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. Test the K20 Engine Control Module voltage circuits at ECM connectors as listed below for a short to ground or an open/high resistance.

•	Terminal 1 X2

•	Terminal 3 X2

•	Terminal 5 X2

2. Test the K20 Engine Control Module ground circuits at ECM connectors as listed below for an short to voltage or an open/high resistance.

•	Terminal 2 X2

•	Terminal 4 X2

•	Terminal 6 X2

3. Observe the DTCs with the scan tool.

⇒	If DTC P16F3 00 resets, replace the K20 Engine Control Module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for control module replacement, programming and setup