P1380 Chevrolet Code: Explanation and Repair Guide
The diagnostic code P1380 for Chevrolet indicates that an ignition misfire has been detected, but data regarding rough road conditions is not available. This means the engine control module (ECM) identified an ignition problem in one or more cylinders while the vehicle was driving on uneven terrain, but it could not collect the necessary information for detailed analysis due to road conditions. Misfires can cause power loss, rough idling, and increased fuel consumption.
Possible Causes of Code P1380
The main causes of this code include:
- Faulty Ignition Components:
- Worn or damaged spark plugs
- Faulty ignition coils
- Damaged spark plug wires
- Fuel Supply Issues:
- Clogged fuel injectors
- Dirty fuel filter
- Low fuel pressure or failing fuel pump
- Intake System Leaks:
- Vacuum leaks in the intake manifold
- Cracked or poorly connected vacuum hoses
- Engine Timing Problems:
- Stretched or misaligned timing belt or chain
Common Symptoms
Symptoms associated with code P1380 include:
- Rough Idle or Vibrations: Engine shaking or instability, especially at idle.
- Power Loss: Difficulty accelerating or reduced engine performance.
- Engine Hesitation: Delays or jerking during acceleration.
- Check Engine Light On: A warning light on the dashboard.
- High Fuel Consumption: Inefficient fuel usage.
Repair Steps
To resolve this issue, follow these steps:
- Scan the ECM Code:
Use an OBD-II diagnostic tool to identify the cylinder affected by the misfire. - Inspect the Ignition System:
Check the condition of spark plugs, coils, and ignition wires. Replace worn or faulty components. - Check the Fuel Supply System:
Inspect and clean fuel injectors. Change the fuel filter if necessary and test fuel pump pressure. - Look for Vacuum Leaks:
Examine the intake manifold and hoses for possible leaks. Repair or replace damaged components. - Check Engine Timing:
Inspect the condition of the timing belt or chain and readjust or replace if misaligned.
Repair Cost
The total cost depends on the exact cause:
- Parts:
- Spark plugs, coils, or fuel injectors: $100 to $500
- Labor:
- Shop rates: $200 to $500
Estimated Total Cost: Between $300 and $1,000. Rates may vary based on the vehicle model, geographic location, and shop fees.
Technical Notes
- If other error codes are present with P1380, resolve them first before resetting the code.
- The P1380 code is typically set when the electronic brake control module (EBCM) cannot provide reliable data on rough roads while the PCM detects a misfire.
If in doubt or if the problem persists, consult a qualified technician for thorough diagnosis and repair.