Timing Reference High Resolution Signal B No Pulses
The P0375 code means the vehicle's onboard diagnostic system has detected: Timing Reference High Resolution Signal B No Pulses. This is a critical severity code.
- Keep driving?
- No — stop driving
- DIY difficulty
- hard
- Estimated cost
- $100 - $600 (parts and labor)
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Common Symptoms
- Engine may not start or runs only on one bank
- Check Engine Light on
- No cam sensor B signal on scan tool
- Possible limp mode
Probable Causes (Ranked by Likelihood)
- Failed camshaft position sensor B Very High
- Broken wiring to cam sensor B High
- Disconnected sensor connector Moderate
- PCM input failure Low
Frequently Asked Questions
Will the engine run without cam sensor B?
Some engines can run in a degraded mode using only one cam sensor, but with reduced performance and a stored code.
Is cam sensor B always on Bank 2?
Typically yes, cam sensor B refers to the Bank 2 camshaft sensor, but consult your service manual for your specific engine.
Can I drive without Bank 2 cam sensor?
Only short distances. The engine may not inject fuel correctly to Bank 2 cylinders without this signal.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Check for cam sensor B signal on scan tool during cranking.
-
Inspect sensor connector.
-
Measure sensor resistance or voltage output.
-
Verify reluctor wheel integrity.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Commonly Affected Vehicles
- 2010-2020 Chevrolet Silverado (5.3L V8)
- 2012-2019 Ford F-150 (5.0L V8)
- 2008-2018 Ram 1500 (5.7L HEMI)
- 2011-2020 Toyota Tundra (5.7L V8)
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