If your Chevrolet Silverado’s check engine light is on and a scan tool shows P1344, you’re not seeing a generic sensor fault this code points to a specific timing-related issue that can affect drivability, fuel economy, and long-term engine health. Knowing what P1344 means for Chevrolet Silverado helps you avoid misdiagnosing it as a simple spark plug or coil problem, which is a common mistake.

What does P1344 actually mean?

P1344 is a manufacturer-specific OBD-II trouble code. For Chevrolet Silverado models (especially 2007–2013 with the 5.3L or 6.0L V8 engines), it stands for “Crankshaft Position (CKP) Sensor and Camshaft Position (CMP) Sensor Correlation – Bank 1, Sensor A.” In plain terms: the engine control module (ECM) detected that the crankshaft and camshaft aren’t rotating in sync meaning the timing relationship between them is off by more than the allowed tolerance.

This isn’t about a failed sensor alone. It’s about timing specifically, whether the valves open and close at the right moment relative to piston movement. If they don’t, combustion suffers, and the ECM sets P1344.

When does P1344 show up on a Silverado?

You’ll typically see P1344 after symptoms like rough idle, hesitation during acceleration, or an engine that cranks but won’t start. Some drivers notice a noticeable loss of power or stalling at low speeds. It often appears alongside other codes like P0300 (random misfire) or P0016 (cam-crank correlation bank 1), especially if the timing chain has stretched or the cam phaser is sticking.

It’s most common on higher-mileage Silverados (120,000+ miles) where the timing chain tensioner wears out or oil flow to the cam phaser becomes restricted. Cold starts can trigger it more frequently especially if the engine oil is old or too thick.

What’s usually causing it and what’s not?

The root cause is rarely just a bad CKP or CMP sensor. More often, it’s one of these:

  • A worn or stretched timing chain or faulty timing chain tensioner
  • A stuck or failing cam phaser (especially on variable valve timing engines)
  • Low or dirty engine oil which prevents the phaser from adjusting properly
  • Loose or damaged sensor wiring, or metal shavings stuck on the sensor tip

Replacing the crank or cam sensor without checking timing components first is the most frequent misstep. That’s why digging deeper matters you can read more about how symptoms line up in our detailed symptom analysis for Silverado.

How is P1344 different from similar codes in other vehicles?

While P1344 means roughly the same thing across GM vehicles, its behavior and common causes vary by platform. On a Honda Civic (2018), for example, it’s more often tied to VTC oil control valve issues and on a Subaru Outback 2.5L, it’s frequently linked to exhaust cam sprocket slippage. If you’re comparing notes across brands, our breakdowns for the Honda Civic and Subaru Outback may help clarify those differences.

What should you do next?

Start with basics: check the engine oil level and condition. If it’s low, dark, or smells burnt, change it with the correct viscosity and OEM-approved oil. Then inspect both the crank and cam sensor connectors for corrosion or loose pins. Clean the sensor tips gently metal shavings are common near the CKP sensor.

If those steps don’t clear the code, or if it returns immediately after clearing, move to timing inspection. That includes checking timing chain slack, tensioner operation, and cam phaser function. Don’t assume the chain is fine just because there’s no rattle internal wear can be silent.

For reference, the Society of Automotive Engineers outlines standard test procedures for cam-crank correlation in SAE J2012 you can find more details on their site using the J2012 standard.

Quick action checklist:

  1. Check and change engine oil if overdue or contaminated
  2. Inspect CKP and CMP sensor connections and mounting surfaces
  3. Scan for additional codes especially P0016 or P0300
  4. Listen for timing chain rattle on cold startup
  5. If unsure, verify timing marks before replacing parts