The P0378 trouble code is associated with Timing Reference High Resolution Signal B Intermittent or Erratic Pulses, indicating that there are intermittent or erratic pulses detected in the high-resolution signal from the timing reference.
P0378 Timing Reference High Resolution Signal B Intermittent/Erratic Pulses
Code symptoms P0378.
1. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
2. Irregular engine operation.
3. Possible difficulty in starting the engine.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0378.
1. Intermittent or erratic pulses detected in the timing reference high-resolution signal B.
2. Wiring or connection issues in the timing reference circuit.
3. Problems with the Engine Control Module (ECM).
Code Solutions P0378.
1. Inspect and, if necessary, replace the component responsible for the timing reference high-resolution signal B.
2. Check for any faults or damages in the wiring or connections of the timing reference circuit.
3. If ECM issues are suspected, consult a qualified technician for diagnosis and potential reprogramming or replacement.