P040B
0 owner reports and 23 manufacturer filings across 6 model years from Chevrolet, Dodge, Jeep.
Where P040B shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2016 Chevrolet Volt | Engine | 6 | — |
| 2016 Dodge Durango | Engine And Engine Cooling | 4 | — |
| 2016 Jeep Grand Cherokee | Engine And Engine Cooling | 4 | — |
| 2017 Chevrolet Volt | Engine | 3 | — |
| 2017 Dodge Durango | Electrical System | 3 | — |
| 2017 Jeep Grand Cherokee | Electrical System | 3 | — |
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 P040B. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- 18-049-202020-05-27 · Fuel System, Gasoline
- Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs have been set:P06EF - Engine Restart Performance(3.0L and 3.6L Only). P0556 - Brake Booster Pressure Sensor Cir
- 18-024-17 REV. C2017-09-23 · Electrical System — Software
- Flash: Powertrain Diagnostic and System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one of the following DTCs have been set:P0556 - Brake Booster Pressure Sensor Circuit Performance. P040B - Exh
- 18024172017-08-29 · Electrical System
- Flash: Powertrain Diagnostic and System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one of the following DTCs have been set:P040B - Exhaust Gas Recirculation Temperature Sensor 1 Circuit Performa
- 32340B2016-04-19 · Engine
- 32340B ? Service Update Bulletin (Service Procedure Revised). An engine misfire condition could occur on these vehicles causing the check engine/service engine soon light to illuminate, a rough or high idle condition, and diagnostic trouble code (DTC) P0300 or P050D to set. A software update is available to correct this and also a condition where DTCs P040B, P041B, P1427 and P1429 may set incorr
- SB-32340-B2016-04-19 · Engine
- 32340B SERVICE UPDATE BULLETIN (SERVICE PROCEDURE REVISED). AN ENGINE MISFIRE CONDITION COULD OCCUR ON THESE VEHICLES CAUSING THE CHECK ENGINE/SERVICE ENGINE SOON LIGHT TO ILLUMINATE, A ROUGH OR HIGH IDLE CONDITION, AND DIAGNOSTIC TROUBLE CODE (DTC) P0300 OR P050D TO SET. A SOFTWARE UPDATE IS AVAILABLE TO CORRECT THIS AND ALSO A CONDITION WHERE DTCS P040B, P041B, P1427 AND P1429 MAY SET INCORR
- 68142905A2016-03-16 · Engine And Engine Cooling
- EGR Temperature Sensor This Tech Tip applies to 2016MY Jeep Grand Cherokee (WK) and Dodge Durango (WD) with the 3.6L Pentastar engine (ERC)~ Prior to replacing a component due to any of the following DTCs - P0401, P040B, P2457, P04D0, P04D1, P04D2, or P04CE please contact Omar Jobe at Cell (248) 910-2166.~ If a response is not received within 30 minutes, then proceed with the necessary repair.
What P040B means
Source: SAE J2012 / OBD-IIP040B 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 P040B
Source: NHTSA files and the OBD-II standardCan I keep driving with P040B 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.