CARWATCH
P0378 Error on Toyota
What it means and how to fix it
🚨 Fault Description (P0378)
The DTC code P0378 in a Toyota vehicle is a sign that the onboard computer has registered the following anomaly:
"Timing Reference High Resolution Signal B Too Few Pulses"
Despite being a generic fault, how it affects performance and where the physical problem is located changes a lot depending on the specific Toyota model you drive.
Other frequent faults detected in Toyota:
Get an Exact AI Diagnosis for your Toyota
With the CarWatch app you can connect a Bluetooth OBD2 scanner and let our AI analyze the P0378 code by crossing it with your vehicle's history and real-time telemetry.
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To clear the engine light and read the P0378 code from your phone, you need an OBD2 adapter compatible with the Toyota ECU.
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