P0374 - Understanding DTC P0374: Common in 2015-2018 Chevrolet Silverado and GMC Sierra Models

Quick Answer

P0374 means: DTC P0374 indicates an issue with the timing signal from the crankshaft position sensor.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with P0374? Immediate attention is required to prevent potential engine damage.

Common Questions

What does P0374 mean and how does it affect my car?

DTC P0374 indicates an issue with the timing signal from the crankshaft position sensor. This can lead to poor engine performance, misfires, and increased fuel consumption. If not resolved, it may result in further engine damage.

What are the most common causes of P0374 and how much does it cost to fix?

The most common causes of P0374 include a faulty crankshaft position sensor and damaged wiring. Repair costs can range from $150 to $300 for sensor replacement, while wiring repairs can range from $50 to $150.

Can I drive my car with P0374 or should I stop immediately?

While you may be able to drive with P0374, it is not advisable. Ignoring this code can lead to serious engine problems and safety risks. It's best to have it diagnosed and repaired as soon as possible.

How can I diagnose P0374 myself using GeekOBD APP?

To diagnose P0374 using the GeekOBD APP, first connect it to your vehicle's OBD2 port. Retrieve the error codes and freeze frame data. Check for any additional codes that might provide context, and inspect the crankshaft position sensor and wiring based on the data provided.

What vehicles are most commonly affected by P0374?

DTC P0374 is commonly found in models like the 2016 Chevrolet Silverado, 2017 GMC Sierra, and other GM vehicles from this era. Regularly check for any recalls or technical service bulletins (TSBs) related to this code.

How can I prevent P0374 from happening again?

Regular maintenance is key. Ensure timely oil changes, inspect electrical connections, and replace worn components. Additionally, consider using the GeekOBD APP for regular diagnostics to catch issues early.

What is P0374?

DTC P0374 refers to a problem with the timing signal, specifically indicating that the signal from the crankshaft position sensor is inconsistent or out of range. This code typically surfaces when the Engine Control Module (ECM) detects that the crankshaft position sensor is not functioning properly or is unable to provide a reliable signal to the ECM. In real-world terms, this means that your vehicle may struggle with engine performance, leading to issues like misfiring or stalling. Moreover, if left unaddressed, P0374 can lead to further complications such as reduced fuel efficiency, increased emissions, and potential damage to the engine or transmission over time. The most common symptoms associated with this code include the check engine light illuminating, poor acceleration, and a noticeable drop in fuel economy. If you own a vehicle known for this issue, such as a 2016 Chevrolet Silverado, it's crucial to address the problem promptly to avoid additional repairs and maintain optimal performance.

System: P - Powertrain (Engine, Transmission, Emissions)

Symptoms

Common symptoms when P0374 is present:

  • The check engine light stays on constantly, indicating the vehicle's onboard diagnostics have detected an issue.
  • Engine hesitates during acceleration, causing a sluggish response when you press the gas pedal.
  • Fuel economy decreased by 10-15%, resulting in more frequent visits to the gas station.
  • Rough idling when the vehicle is stationary, possibly feeling like the engine is about to stall.
  • Unusual engine noises, such as knocking or pinging, which may indicate internal engine issues.

Possible Causes

Most common causes of P0374 (ordered by frequency):

  1. The most common cause is a faulty crankshaft position sensor, which has a likelihood of about 70%. This sensor monitors the position and rotational speed of the crankshaft, and if it's defective, the ECM cannot accurately control the engine timing.
  2. Another possible cause is damaged wiring or connectors related to the crankshaft position sensor. Corrosion or wear on these components can affect the signal transmitted to the ECM.
  3. A third cause could be a malfunctioning ECM itself, which can misinterpret signals from the sensor. To prevent this, ensure regular maintenance and software updates for your vehicle's ECU.
  4. Less common but serious causes include issues with the timing chain or belt, which can lead to significant engine damage if not addressed promptly.
  5. A rare cause could be a failed camshaft position sensor, which can also impact the timing and performance of the engine.

P0374 Repair Costs

Cost Breakdown by Repair Type

Crankshaft Position Sensor Replacement

Replacing the faulty crankshaft position sensor is the most common solution for DTC P0374.

  • Total: $150 - $300
  • Success rate: 85%
Wiring Repair

Repairing any damaged wiring or connectors related to the crankshaft position sensor.

  • Total: $50 - $150
  • Success rate: 75%
ECM Reprogramming

If the ECM is found to be faulty, reprogramming or replacing it may be necessary.

  • Total: $300 - $1,000
  • Success rate: 60%
Money-Saving Tips for P0374
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional P0374 Diagnosis Process

Follow these systematic steps to accurately diagnose P0374. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the crankshaft position sensor and associated wiring (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the crankshaft position sensor and associated wiring (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any recurrence of the code (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any recurrence of the code (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: 2016 Chevrolet Silverado P0374 Repair

Vehicle: 2016 Chevrolet Silverado, 45,000 miles

Problem: Customer reported check engine light and rough idling.

Diagnosis: Performed an OBD2 scan using GeekOBD APP, confirmed P0374. Inspected crankshaft position sensor and wiring.

Solution: Replaced the crankshaft position sensor and repaired damaged wiring.

Cost: $250 (sensor $150, wiring repair $100)

Result: Post-repair, the check engine light was cleared, and engine performance returned to normal.

Case Study 2: 2017 GMC Sierra P0374 Diagnostic Case

Vehicle: 2017 GMC Sierra, 55,000 miles

Problem: Vehicle exhibited poor acceleration and check engine light was on.

Diagnosis: Used GeekOBD APP to retrieve codes, found P0374. Conducted a thorough inspection of the sensor and wiring.

Solution: Replaced the faulty crankshaft position sensor and reprogrammed the ECM.

Cost: $400 (sensor $200, ECM reprogramming $200)

Result: After repairs, the vehicle's performance improved significantly with no further issues.

Diagnose P0374

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: P0374
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes