P0374
Timing Reference High Resolution Signal A No Pulses
P0374 is an OBD-II diagnostic trouble code meaning: Timing Reference High Resolution Signal A No Pulses. Common causes: reference sensor a fault, open or short circuit in the sensor circuit. Estimated repair cost: $22–111.
Symptoms
- Engine won't start
- Unstable operation at idle
- Misfire
- Significant power loss
- Check Engine Light Is On
Causes
- Reference sensor A fault
- Open or short circuit in the sensor circuit
- Damage to the drive disk (ring gear)
- Weak sensor fastening, incorrect gap
- Distributor malfunction (for engines with distributor)
How to Fix
- Read codes, determine if there are related crankshaft sensor codes
- Check the sensor circuit: power, ground, signal wire
- Check the air gap between the sensor and the drive disk
- Inspect the drive disc teeth for damage.
- Replace reference signal sensor
- For distributor systems - check the distributor rotor and cap
Related codes
Error P0374 by Vehicle Brand
FAQ
What does the P0374 code mean?
P0374 is an OBD-II diagnostic trouble code that indicates: Timing Reference High Resolution Signal A No Pulses
What causes a P0374 error code?
The most common causes of P0374 include: Reference sensor A fault; Open or short circuit in the sensor circuit; Damage to the drive disk (ring gear); Weak sensor fastening, incorrect gap.
How do I fix a P0374 diagnostic trouble code?
To fix P0374: Read codes, determine if there are related crankshaft sensor codes. Check the sensor circuit: power, ground, signal wire. Check the air gap between the sensor and the drive disk. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0374?
Do not drive — repair immediately
How much does it cost to fix P0374?
The estimated repair cost for P0374 is $22–111. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat