Timing Reference High Resolution Signal B Too Many Pulses
The PCM has detected the engine position sensor B is generating too many pulses in the timing reference signal. This indicates a malfunction in the high-resolution crankshaft or camshaft position signal circuit that could affect engine timing and performance.
What You Might Notice
- Check Engine Light illuminated
- Rough idle or unstable engine operation
- Hesitation during acceleration
- Difficulty starting or extended cranking time
- Potential loss of fuel economy
Most Common Causes
- 1
Faulty Engine Position Sensor B
The crankshaft or camshaft position sensor B has failed or is producing erratic signals. This is the most common cause of excessive pulse generation.
- 2
Damaged Reluctor Wheel
The reluctor ring or tone wheel associated with sensor B is damaged, cracked, or has missing teeth, causing irregular signal pulses to the sensor.
- 3
Wiring or Connector Issues
Corroded connectors, damaged wiring, loose connections, or short circuits in the sensor B circuit are preventing proper signal transmission to the PCM.
- 4
Contaminated Engine Oil or Debris
Metal particles, sludge, or contamination in the oil near the sensor or reluctor wheel can cause signal interference or excessive readings.
How to Diagnose It
- 1
Check Faulty Engine Position Sensor B — The crankshaft or camshaft position sensor B has failed or is producing erratic signals. This is the most common cause of excessive pulse generation.
- 2
Check Damaged Reluctor Wheel — The reluctor ring or tone wheel associated with sensor B is damaged, cracked, or has missing teeth, causing irregular signal pulses to the sensor.
- 3
Check Wiring or Connector Issues — Corroded connectors, damaged wiring, loose connections, or short circuits in the sensor B circuit are preventing proper signal transmission to the PCM.
- 4
Check Contaminated Engine Oil or Debris — Metal particles, sludge, or contamination in the oil near the sensor or reluctor wheel can cause signal interference or excessive readings.
How to Fix It
- 1
Inspect and Replace Engine Position Sensor B
Locate sensor B (typically crankshaft or camshaft position), inspect for damage or contamination, and replace if faulty. Clear the code after replacement and test drive to verify.
- 2
Inspect Reluctor Wheel and Timing Ring
Remove timing covers as needed to visually inspect the reluctor ring or tone wheel for cracks, missing teeth, or damage. Replace if damaged.
- 3
Check and Repair Sensor Wiring and Connectors
Inspect the sensor B wiring harness for cuts, corrosion, or loose connectors. Clean corroded connections with contact cleaner and ensure all connections are tight. Repair or replace damaged wiring.
- 4
Perform Oil Change and Flush
Change engine oil and filter to remove any metal particles or contaminants that may be affecting sensor operation. This helps restore normal signal quality.
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