P0234 on Chevrolet vehicles The turbocharger or supercharger is making more boost than the computer asked for

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Owners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.

Bulletins and campaigns Chevrolet filed with NHTSA whose summary names P0234. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• PIP5495A Service bulletin
  2017-06-08 · Equipment — Other — Owners/Service/Other Manual
• This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
• PIP5495B Service bulletin
  2017-06-14 · Equipment — Other — Owners/Service/Other Manual
• This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
• PIP5495C Service bulletin
  2017-10-20 · Equipment — Electrical
• This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
• PIP5812A Service bulletin
  2021-07-22 · Power Train — Automatic Transmission — Fluid/Lubricant — Valves/Valve Body
• This Preliminary information communicates the possibility of dtc p0299 p0234 setting due to oil/moisture cndensate freezing in Turbocharger Wastegate Regulator Solenoid Valve (TCV) during cold weather driving
• PIP5812 Service bulletin
  2021-06-25 · Engine
• This Preliminary information communicates the possibility of dtc p0299 p0234 setting due to oil/moisture cndensate freezing in Turbocharger Wastegate Regulator Solenoid Valve (TCV) during cold weather driving
• PIP5812B Service bulletin
  2021-09-27 · Engine And Engine Cooling — Engine — Gasoline — Turbo/Supercharger
• This Preliminary information communicates the possibility of dtc p0299 p0234 setting due to oil/moisture cndensate freezing in Turbocharger Wastegate Regulator Solenoid Valve (TCV) during cold weather driving
• PIP5495G Service bulletin
  2018-10-17 · Engine And Engine Cooling
• This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
• PIP5495H Service bulletin
  2018-11-14 · Engine
• This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
• PIP5495J Service bulletin
  2019-05-06 · Engine
• This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
• PIP5495K Service bulletin
  2019-10-14 · Engine And Engine Cooling — Engine — Other Fuel Types — Turbo/Supercharger
• This Preliminary Information communication provides information to the technician about vehicles that may have a Malfunction Indicator Lamp on. The technician may find Diagnostic Trouble Codes P0299 or P0234 set. The technician is provided with a list of causes of misdiagnosis leading to returned Turbochargers with no trouble found. The purpose of this information is to reduce the number of no tro
• 21NA293 Service bulletin
  2022-01-13 · Engine And Engine Cooling
• This technical bulletin provides repair information to correct a customer concern of Poor Engine Performance in Extremely Cold Weather Conditions, Charge Air Cooler Icing - Malfunction Indicator Lamp (MIL) Illuminated, DTC P0299, P0234, P0236, P00C7 Set.
• PIP5892 Service bulletin
  2022-12-01 · Engine And Engine Cooling
• This Preliminary Information communication provides information to the dealer technician related to a Malfunction Indicator Lamp coming on post turbocharger replacement with P0234 (Engine Overboost) set current or in history. It advises the technician to clear the DTC, Use GDS2 to perform the Intake System Learned Values Reset. To advise the customer that GM is aware of this concern and will prov

A stored code names the test that failed, never the part that caused it. The record above is what Chevrolet and its owners have filed about it; the code’s page across every make has the whole file.