P0374 Code: Timing Reference Signal A No Pulses

🟠 Moderate severity · drivable

If the engine is running, drive with caution to a shop; this code can cause a no-start or sudden stalling.

What P0374 means

The engine computer is getting no high-resolution timing pulses at all. This fine pulse signal, usually from the crankshaft position sensor, lets the computer time the ignition precisely. Without it, the engine may not start, or it may stall and die while driving.

Symptoms

Check engine light is on
Engine cranks but won't start
Engine stalls or dies while driving
No spark

Common causes

most common: Faulty crankshaft position sensor
common: Broken wiring or loose connector at the sensor
less common: Damaged reluctor wheel
rare: Failed engine computer

How to fix it

Fix	DIY?	Typical cost
Replace the crankshaft position sensor	Yes	$50–200
Repair broken sensor wiring	Mechanic	$50–200
Inspect the reluctor wheel for damage	Mechanic	$100–300

Frequently asked questions

Can I drive with a P0374 code?

Only if the engine is running, and even then it may stall. A P0374 often means the car won't start at all.

What is the most common cause of P0374?

A faulty crankshaft position sensor or the wiring to it.

How much does it cost to fix a P0374?

Typically $50–$200 for a new crankshaft position sensor.

Related codes

P0370 Code: Timing Reference High Resolution Signal A Malfunction

P0335 Code: Crankshaft Position Sensor Circuit Malfunction

P0336 Code: Crankshaft Position Sensor A Circuit Range/Performance

Updated 2026-08. This page is informational and not a substitute for professional diagnosis.