What error codes are common for the 2019 Chevrolet Silverado 1500 T1XX?

Common Error Codes for 2019 Chevrolet Silverado 1500 T1XX

The 2019 Chevrolet Silverado 1500 T1XX is equipped with advanced onboard diagnostics (OBD-II) systems that can generate various error codes. These codes help identify problems within the vehicle’s systems. Below are some common error codes you may encounter along with their typical symptoms and potential solutions.

Common Error Codes and Their Meanings

1. P0171: System Too Lean (Bank 1)

   • Symptoms: Engine light on, rough idle, poor acceleration, possible stalling.
   • Potential Causes: Vacuum leaks, fuel delivery issues, faulty oxygen sensor.

2. P0420: Catalyst System Efficiency Below Threshold (Bank 1)

   • Symptoms: Check engine light on, reduced engine power, failed emissions test.
   • Potential Causes: Faulty catalytic converter, bad oxygen sensors, exhaust leaks.

3. P0455: Evaporative Emission Control System Leak Detected (Large Leak)

   • Symptoms: Check engine light on, strong gas smell, possible fuel odor.
   • Potential Causes: Faulty gas cap, damaged EVAP lines, malfunctioning purge valve.

4. P0300: Random/Multiple Cylinder Misfire Detected

   • Symptoms: Rough running engine, decreased power, increased fuel consumption.
   • Potential Causes: Faulty spark plugs, ignition coils, fuel injectors, or vacuum leaks.

5. P0711: Transmission Fluid Temperature Sensor Range/Performance Problem

   • Symptoms: Transmission shifting issues, overheating warnings, check engine light on.
   • Potential Causes: Faulty transmission fluid temperature sensor, wiring issues, low transmission fluid.

6. P0500: Vehicle Speed Sensor Malfunction

   • Symptoms: Speedometer not working, erratic shifting, possible traction control issues.
   • Potential Causes: Faulty vehicle speed sensor, damaged wiring, transmission issues.

7. P0641: Sensor Reference Voltage A Circuit

   • Symptoms: Check engine light on, potential issues with multiple sensors.
   • Potential Causes: Wiring issues, faulty PCM, or short circuit.

Repair Instructions

1. For P0171: System Too Lean

   • Repair Steps:
     1. Inspect and replace any damaged vacuum hoses.
     2. Clean or replace the mass air flow (MAF) sensor.
     3. Check fuel pressure and replace the fuel filter if necessary.

2. For P0420: Catalyst Efficiency

   • Repair Steps:
     1. Inspect the catalytic converter for any physical damage.
     2. Replace faulty oxygen sensors (upstream and downstream).
     3. Repair any exhaust leaks.

3. For P0455: EVAP System Leak

   • Repair Steps:
     1. Replace the gas cap if faulty.
     2. Check and replace damaged EVAP hoses.
     3. Test and replace the purge valve if necessary.

4. For P0300: Misfire

   • Repair Steps:
     1. Replace faulty spark plugs and ignition coils.
     2. Clean or replace fuel injectors.
     3. Check for vacuum leaks and repair as needed.

5. For P0711: Transmission Fluid Temperature Sensor

   • Repair Steps:
     1. Replace the faulty transmission fluid temperature sensor.
     2. Inspect wiring and connections for damage.

6. For P0500: Speed Sensor

   • Repair Steps:
     1. Replace the vehicle speed sensor as necessary.
     2. Repair any damaged wiring or connectors.

7. For P0641: Sensor Reference Voltage

   • Repair Steps:
     1. Check wiring for shorts or opens and repair as needed.
     2. Replace the PCM if necessary.

Conclusion

Once repairs are completed, clear the error codes using the OBD-II scanner and take the vehicle for a test drive to ensure that the issue has been resolved. Monitor the vehicle’s performance and check for the reoccurrence of any codes. If issues persist, further diagnostics may be necessary.