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P0649
Speed Control Lamp Control Circuit
Generic · body
Data confidence
90%
The control module detected improper operation of the Speed Control Lamp Control circuit.
Possible causes
- Wiring
- poor connection
- bulb
- ECM
TuningBot DTC Database · v4.37.14
P0649 Speed Control Lamp Control Circuit
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P0649 means
Related and nearby codes
How to read P0649
P
Powertrain: engine, transmission and driveline systems.
0
Generic SAE-standard code: same meaning on every make.
649
Specific fault index within the subsystem.
Frequently asked questions about P0649
What does P0649 mean?
Speed Control Lamp Control Circuit. The control module detected improper operation of the Speed Control Lamp Control circuit.
Is P0649 generic or manufacturer-specific?
P0649 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P0649 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