The control module detected that the Engine Coolant Temperature Radiator Outlet signal stayed above the expected range. This is the manufacturer-specific definition used by BMW.
TuningBot DTC Database · v4.37.14
P1040 Diagnostic Trouble Code (4 interpretations)
4 manufacturer-specific interpretations across 3 manufacturers in the TuningBot DTC database.
BMW
1 interpretation
Dodge
1 interpretationThe control module detected a fault associated with the ECU Does Not See Closed Throttle circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Dodge.
VAG
2 interpretationsThe control module detected improper operation of the Injector 1, supply voltage circuit. This is the manufacturer-specific definition used by Audi.
Possible causes
- Wiring
- injector
The control module detected improper operation of the Injector 1, supply voltage circuit. This is the manufacturer-specific definition used by Volkswagen.
Possible causes
- Wiring
- injector
Related and nearby codes
How to read P1040
Powertrain: engine, transmission and driveline systems.
Manufacturer-defined range: the meaning can differ between brands.
Specific fault index within the subsystem.
Frequently asked questions about P1040
What does P1040 mean?
Diagnostic Trouble Code (4 interpretations). The control module detected that the Engine Coolant Temperature Radiator Outlet signal stayed above the expected range. This is the manufacturer-specific definition used by BMW.
Is P1040 generic or manufacturer-specific?
P1040 is a manufacturer-specific code. In this database it is documented for: BMW, Dodge, VAG. The same number can mean something different on other brands.
Can TuningBot remove P1040 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
Other file services
Understand the system behind this code: Diagnostic Strategy and DTC Logic
