P228C · Manufacturer communications

CHEVROLET, GMC · 2026-01-28

Certain vehicles may set a Malfunction Indicator Light. Additionally, the vehicle may set DTCs P228C, P0089, and/or P006C. Dealers are to reprogram the Engine Control Module.

CHEVROLET, GMC · 2026-01-28

Certain vehicles may set a Malfunction Indicator Light. Additionally, the vehicle may set DTCs P228C, P0089, and/or P006C. Dealers are to reprogram the Engine Control Module.

BUICK, CHEVROLET, GMC · 2025-05-01

This Preliminary information communicates there could be an electrical connection concerns at the high pressure fuel pump, and may set any combnation of diagnostic trouble codes, P0089 P0090 P00C6 P163A and / or P228C. The technician should inspect the terminals and manipulate the harness to see if any of the codes can be duplicated. Replace or repair connector or terminals as needed.

CHEVROLET · 2024-09-25

This service bulletin provides a procedure to check the engine and bank 2 fuel injector harness to determine if its the cause of the customers concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTCs P00C6, P312B, P217D, P2149, P312C, P01BF, P2CA0, P216D, P2155, P228C, and/or U101C Set, due to water intrusion into the electrical connector.

BUICK, CADILLAC, CHEVROLET, GMC · 2020-03-04

This technical bulletin provides a procedure to inspect the fuel system and replace the high pressure fuel pump if faulty for a Reduced Engine Power, MIL On, DTC P228C condition.

BUICK, CADILLAC, CHEVROLET, GMC · 2018-04-13

This technical bulletin provides a procedure to inspect the fuel system and replace the high pressure fuel pump if faulty for a Reduced Engine Power, MIL On, DTC P228C condition.

BUICK, CADILLAC, CHEVROLET, GMC · 2018-01-31

This Preliminary Information communication advises the technician on the steps to diagnose the concern, and the steps to repair the concern of Diagnostic Trouble Code P228C setting. The technician is to inspect the fuel and readings for the High Pressure Fuel Pump. The technician is to drain and clean fuel tank and all lines if contamination is found. The technician is to replace the high pressure fuel pump and the fuel inlet line to the high pressure fuel pump. The dealer is to request the customer complete the fuel survey attached and send to the fuel system engineer at the e-mail address provided. Latest revision added model years to the PI with no other changes. New revision adds model year and removes the customer surveys.

BUICK, CADILLAC, CHEVROLET, GMC · 2017-01-31

This Preliminary Information communication advises the technician on the steps to diagnose the concern, and the steps to repair the concern of Diagnostic Trouble Code P228C setting. The technician is to inspect the fuel and readings for the High Pressure Fuel Pump. The technician is to drain and clean fuel tank and all lines if contamination is found. The technician is to replace the high pressure fuel pump and the fuel inlet line to the high pressure fuel pump. The dealer is to request the customer complete the fuel survey attached and send to the fuel system engineer at the e-mail address provided. Latest revision added model years to the PI with no other changes.

CADILLAC, CHEVROLET · 2016-10-21

16029 - Service Update. The high pressure fuel pump or fuel rail fastener(s) may have been improperly tightened during manufacturing. Fuel could leak from the fuel pump or fuel rail causing the vehicle to go into reduced power mode. If this occurs DTC P228C, P228D or P00C6 will set, causing the Check Engine Light to be illuminated.

BUICK, CADILLAC, CHEVROLET, GMC · 2016-03-22

This Preliminary Information communication provides information to the technician with the steps to diagnose and repair vehicles that may have Service Engine Soon lamp or reduced engine power message came on and was cleared after cycling the key. Also technician may find a P228C set as current or history, and a prior history of High Pressure Fuel Pump replacement, and the customer has been using E85 fuel. If the Diagnostic Trouble Code is current follow Service Information instruction for the repair. If the code is set in history and there are no current drivability concerns take a large fuel sample and let it sit for a couple of hours looking for contamination. Verify the fuel pressure using a scan tool the actual and desired fuel pressures are very close to the same. If contamination is…

CADILLAC, CHEVROLET, GMC · 2015-08-04

This Preliminary Information communication provides information to the technician about vehicles that may have Service Engine Soon Malfunction Indicator Lamp. Technician may find Diagnostic Trouble Codes P0089, P127C, P127D, P0192, P0193, P228C, P228D, and P006C. Technician should follow published Service Information diagnostics for the Diagnostic Trouble Codes that are stored. If Service Information does not lead to a repair for the concern, the fuel rail pressure sensor should be replaced.

BUICK, CADILLAC, CHEVROLET, GMC · 2015-05-14

This Preliminary Information communication advises the technician to follow this Preliminary Information if there is a diagnostic trouble code P00C6 and or P228C set and normal Service Information diagnostics didn?t lead to a repair. Technician is to recheck the terminals at the Engine Control module for fit and tension as well as the crimp to the wire. The engine control module terminals to inspect are in the X2 connector. Inspect terminal number 3, 18 and 19 for the fuel rail pressure sensor and in the X3 connector terminals 16 and 32 for the high pressure fuel pump. The diagnostic trouble codes could set with as little as a 2 ohm resistance reading on these circuits. If any concerns are found replace the affected terminals and verify the repair.

CADILLAC, CHEVROLET, GMC · 2015-04-10

This Preliminary Information communication provides information to the technician about vehicles that may have Service Engine Soon Malfunction Indicator Lamp. Technician may find Diagnostic Trouble Codes P0089, P127C, P127D, P0192, P0193, P228C, P228D, and P006C. Technician should follow published Service Information diagnostics for the Diagnostic Trouble Codes that are stored. If Service Information does not lead to a repair for the concern, the fuel rail pressure sensor should be replaced.

LAND ROVER · 2015-04-08

"SITUATION: THE ENGINE MALFUNCTION INDICATOR LAMP (MIL) MAY BE ILLUMINATED WITH DIAGNOSTIC TROUBLE CODES (DTC) P00C6 AND P228D-00 OR P228C-77 STORED IN THE ENGINE CONTROL MODULE (ECM). ADDITIONALLY, THE ENGINE MAY EXPERIENCE ROUGH RUNNING, HARD STARTING, A ROUGH IDLE, OR MISFIRES AND ONE OR MORE MISFIRE DTCS (P0300, P0301, P0302, P0303, P0304, AND P1315) STORED IN THE ECM. CAUSE: THIS MAY BE CAUSED BY AN INTERNAL FAULT WITH THE METERING VALVE IN THE HIGH PRESSURE FUEL PUMP"

JAGUAR · 2015-04-08

"SITUATION: THE ENGINE MALFUNCTION INDICATOR LAMP (MIL) MAY BE ILLUMINATED WITH DIAGNOSTIC TROUBLE CODES (DTC) P00C6 AND P228D-00 OR P228C-77 STORED IN THE ENGINE CONTROL MODULE (ECM). ADDITIONALLY, THE ENGINE MAY EXPERIENCE ROUGH RUNNING, HARD STARTING, A ROUGH IDLE, OR MISFIRES AND ONE OR MORE MISFIRE DTCS (P0300, P0301, P0302, P0303, P0304, AND/OR P1315) STORED IN THE ECM. CAUSE: THIS MAY BE CAUSED BY AN INTERNAL FAULT WITH THE METERING VALVE IN THE HIGH PRESSURE FUEL PUMP."

BUICK, CADILLAC, CHEVROLET, GMC · 2014-12-17

This Preliminary Information communication provides information to the technician about vehicles that have Diagnostic Trouble Code P00C6 and/or P228C set. Technician will need to inspect the terminals at the Engine Control Module for fit and tension as well as the crimp to wire connection. Terminals to inspect in the ECM are connector x2 terminals 3, 18, and 19 for the fuel rail pressure sensor. Also connector x3 terminals 16 and 32 for the high pressure fuel pump.

BUICK, CADILLAC, CHEVROLET, GMC · 2014-08-18

This Preliminary Information communication provides information to the technician about vehicles that have Diagnostic Trouble Code P00C6 and/or P228C set. Technician will need to inspect the terminals at the Engine Control Module for fit and tension as well as the crimp to wire connection. Terminals to inspect in the ECM are connector x2 terminals 3, 18, and 19 for the fuel rail pressure sensor. Also connector x3 terminals 16 and 32 for the high pressure fuel pump.

BUICK, CADILLAC, CHEVROLET · 2014-06-27

This Preliminary Information communication provides information to the technician about vehicles that have Diagnostic Trouble Code P00C6 and/or P228C set. Technician will need to inspect the terminals at the Engine Control Module for fit and tension as well as the crimp to wire connection. Terminals to inspect in the ECM are connector x2 terminals 3, 18, and 19 for the fuel rail pressure sensor. Also connector x3 terminals 16 and 32 for the high pressure fuel pump.