P0604
0 owner reports and 119 manufacturer filings across 61 model years from Buick, Cadillac, Chevrolet, GMC and others.
Where P0604 shows up
Source: NHTSA manufacturer communications and complaintsShowing the 60 model years where P0604 appears most; it is on file for 61 in total.
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
What it gets filed under
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P0604. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- PIT6512A2026-08-03 · Unknown Or Other
- This PI states that if SDGM DTC P0604/P0607 is set and no other SDGM DTCs are present, clear DTCs and reset the SDGM. Advises of how to contact PQC to authorize SDGM replacement.
- PIT65122026-05-11 · Unknown Or Other
- This PI states that if SDGM DTC P0604/P0607 is set and no other SDGM DTCs are present, clear DTCs and reset the SDGM. Advises of how to contact PQC to authorize SDGM replacement.
- 18-043-262026-03-21 · Engine
- Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): â—� **P0111-00 - Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1. (In Active or Stored status) â—� P0071-00 - Ambient Air Temperature Sensor Performance. (In
- 18-043-262026-03-21 · Engine
- Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): â—� **P0111-00 - Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1. (In Active or Stored status) â—� P0071-00 - Ambient Air Temperature Sensor Performance. (In
- PIP5463A2019-06-17 · Power Train
- This Preliminary Information communication provides information to the technician about vehicles that have a Malfunction Indicator Lamp on and may have a loss of propulsion. Technician may find Diagnostic Trouble Code P0604 set in the Hybrid Powertrain Control Module Technician will need to replace the (T6) Power Inverter Module.
- NTB17-0632017-06-08 · Engine
- 2016-2017 TITAN XD; MIL ON WITH DTC P0604 AND/OR P2299 This bulletin applies only to vehicles equipped with a Cummins 5.0L V8 Diesel engine. IF YOU CONFIRM The MIL is ON with one or both of the following DTCs stored: - P0604 (ECM [Internal Control Module Random Access Memory (RAM) Error]) - P2299 (ACCEL PEDAL POS BRAKE SWITCH) And There are no drivability issues. ACTION 1. Save Comput
What P0604 means
Source: SAE J2012 / OBD-IIP0604 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about P0604
Source: NHTSA files and the OBD-II standardCan I keep driving with P0604 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.