P2630 - O2 Sensor Pumping Current Trim Circuit Low Bank 2, Sensor 1

4-140 Powertrain DTC Charts and Descriptions

Diagnostic Trouble Code (DTC) Charts and Descriptions

P2630 - O2 Sensor Pumping Current Trim Circuit Low Bank 2, Sensor 1 (Continued) Diagnostic Aids:

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test DZ.

P2631 - O2 Sensor Positive Current Trim Circuit High (Bank 2 Sensor 1)

Description: This DTC sets when a concern is detected with the circuit used to determine the oxygen content in the exhaust

gas.

Possible Causes: • UO2SPCT21 circuit short to voltage

• Damaged universal heated oxygen sensor bank 2, sensor 1 (HO2S21)

Diagnostic Aids:

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test DZ.

P2632 - Fuel Pump B Control Circuit/Open

Description: The fuel pump control module 2 monitors the fuel pump module and secondary circuits for a concern. If the fuel

pump control module 2 detects a concern with the fuel pump module or secondary circuits, the fuel pump control module 2 sends an 80% duty cycle signal on the fuel pump monitor 2 (FPM2) circuit to report the concern to the PCM. This DTC sets when the fuel pump control module 2 is still reporting a concern with the fuel pump module or secondary circuits after a calibrated amount of time.

Possible Causes: • FP2PWR circuit open or short to ground

• FP2RTN circuit open

• FP2PWR circuit short to voltage

• FP2RTN circuit short to voltage

• Damaged fuel pump module

• Damaged fuel pump control module 2

Diagnostic Aids: Check for any harness concerns. The fuel pump control module 2 controls the speed of the fuel pump assembly

by supplying a variable voltage to the fuel pump assembly on the FPPWR2 circuit.

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test KC.

P264F - Engine Serial Number Not Programmed Or Incompatible

Description: This DTC sets when the PCM does not receive a valid engine serial number during reprogramming.

Possible Causes: • Engine serial number corrupted during vehicle identification (VID) reprogramming

• PCM replacement

• Damaged PCM

Diagnostic Aids: The VID block must be programmed. Refer to Section 2, Flash Electrically Erasable Programmable Read Only

Memory (EEPROM), Programming VID Block. If the PCM does not allow reprogramming of the VID block, reflashing of the PCM is required.

Application Key On Engine Off Key On Engine Running Continuous Memory

All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.

P268x -

Description:

Possible Causes:

Diagnostic Aids: Refer to the Workshop Manual Section 303-03, Engine Cooling to continue diagnosis.

Application Key On Engine Off Key On Engine Running Continuous Memory

All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.

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