Timing Reference High Resolution Signal B Malfunction
The P0375 code indicates a problem with the high resolution timing reference signal B, which is used by the powertrain control module (PCM) to monitor engine speed and crankshaft position. This signal is typically generated by a crankshaft position sensor or a camshaft position sensor. A malfunction can cause incorrect fuel injection and ignition timing, leading to poor engine performance.
01. Most Common Causes
- Faulty crankshaft position sensor
- Wiring or connector issues in the sensor circuit
- Damaged reluctor ring or tone wheel
- PCM failure (rare)
02. Symptoms You Will Notice
- Engine misfire or rough idle
- Check Engine Light illuminated
- Hard starting or stalling
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Inspect the crankshaft position sensor and its wiring for damage or corrosion.
Step 3: Test the sensor's resistance and signal output with a multimeter or oscilloscope.
Step 4: Check the reluctor ring for damage or debris.
Step 5: If all else fails, test the PCM for proper operation.
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 stalling or poor performance, which may lead to unsafe driving conditions.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a sensor replacement, but diagnostic fees and labor may increase the total.