Timing Reference High Resolution Signal B Too Many Pulses
The P0376 code indicates that the Powertrain Control Module (PCM) has detected an excessive number of pulses from the high-resolution timing reference signal B, which is typically generated by the crankshaft position sensor. This signal is critical for engine timing and fuel injection synchronization. An overabundance of pulses can be caused by a faulty sensor, wiring issues, or mechanical problems like a damaged reluctor ring. This condition can lead to misfires, poor performance, and potential engine damage if not addressed.
01. Most Common Causes
- Faulty crankshaft position sensor
- Damaged or loose wiring/connectors to the sensor
- Crankshaft reluctor ring damage or debris
- PCM software or hardware failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Hard starting or stalling
- Reduced engine power and fuel economy
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the crankshaft position sensor and wiring for damage or looseness.
Step 3: Test the sensor's resistance and signal output with a multimeter or oscilloscope.
Step 4: Inspect the reluctor ring for damage or foreign material; replace if necessary.
Step 5: If all else fails, update or replace the PCM.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause engine misfires, stalling, and potential damage to the catalytic converter or engine.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnostic and sensor replacement, but can be higher if the PCM needs replacement.