P1374 Code: Meaning, Symptoms, Causes & Fix

Overview

Symptoms

• engine noise or unstable timing
• loss of power at mid/high RPM
• hard start when cold

Common causes

• Component failure in the monitored system affecting crankshaft position (ckp)/ignition coil - cylinder 4 - early activation fault
• Control module logic or calibration issue
• Connector pin damage/corrosion or harness stress near related components

How to diagnose P1374

1. Confirm P1374 and capture freeze-frame data with a professional scan tool.
2. Inspect wiring, connectors, and grounds related to crankshaft position (ckp)/ignition coil - cylinder 4 - early activation fault for obvious defects.
3. Use freeze-frame and live data to isolate whether the issue is electrical, mechanical, or control logic.
4. Check for related DTCs to identify the root-cause chain before replacing parts.
5. After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code P1374

Low: This code is low to moderate severity in most cases, but diagnosis is still recommended to avoid recurring warnings.

Can you drive with P1374?

The vehicle is often drivable with P1374, but plan a repair window to prevent repeat faults.

If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.

How to fix it (step-by-step)

1. Repair obvious wiring/connector faults first to prevent repeat parts replacement.
2. Address the root fault mode (generic) in the crankshaft position (ckp)/ignition coil - cylinder 4 - early activation fault circuit/system.
3. Apply the required relearn/adaptation procedure if specified by service information.
4. Road-test and verify P1374 remains cleared under the conditions that originally set the code.

Fix options

• Inspect circuit and connector condition.
• Clear code and confirm through drive cycle.
• Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$180-$700

Common mistakes when diagnosing P1374

• Replacing parts without verifying voltage, ground, and signal integrity first.
• Ignoring related stored/pending codes that indicate upstream faults.
• Skipping post-repair verification drive cycle and readiness checks.

P1374 in common vehicles

P1374 appears across makes such as Nissan, Hyundai, Kia, Volkswagen. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes P1374?

P1374 is commonly set by generic faults affecting crankshaft position (ckp)/ignition coil - cylinder 4 - early activation fault.

How much does it cost to fix P1374?

For P1374, repair costs are typically $180-$700 depending on exact root cause, labor rates, and part quality.

Can I clear P1374 without repair?

You can clear P1374 temporarily, but the code usually returns until the underlying fault is corrected.

Helpful tools

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