Powertrain: engine, transmission and driveline systems.
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Generic SAE-standard code: same meaning on every make.
66B
Specific fault index within the subsystem.
Frequently asked questions about P066B
What does P066B mean?
Cylinder 1 Glow Plug Control Circuit High. The control module detected that the signal in the Cylinder 1 Glow Plug Control circuit stayed above the expected operating range.
Is P066B generic or manufacturer-specific?
P066B is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P066B 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.
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