P1019 GMC Code - Reductant Control Module Sensor Communication Voltage Supply Circuit High Voltage
Quick Answer
The P1019 diagnostic trouble code (DTC) for GMC vehicles indicates a problem with the Reductant Control Module Sensor Communication Voltage Supply Circuit being at a higher voltage level than expected. Common causes include Faulty Sensor: A malfunctioning sensor within the Reductant Control Module can disrupt communication and lead to high voltage levels, Wiring or Connector Damage: Damage to the wiring or connectors in the sensor communication circuit can cause voltage irregularities, Reductant Control Module Malfunction: If the module itself is faulty, it may not be able to regulate voltage levels properly. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1019 GMC indicates Reductant Control Module Sensor Communication Voltage Supply Circuit High Voltage.
- Common causes
- Common causes include Faulty Sensor: A malfunctioning sensor within the Reductant Control Module can disrupt communication and lead to high voltage levels, Wiring or Connector Damage: Damage to the wiring or connectors in the sensor communication circuit can cause voltage irregularities, Reductant Control Module Malfunction: If the module itself is faulty, it may not be able to regulate voltage levels properly.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P1019 GMC Description
The P1019 diagnostic trouble code (DTC) for GMC vehicles indicates a problem with the Reductant Control Module Sensor Communication Voltage Supply Circuit being at a higher voltage level than expected. The Reductant Control Module is a critical component of the selective catalytic reduction (SCR) system, which is responsible for reducing harmful emissions in the vehicle's exhaust. The sensor communication voltage supply circuit plays a crucial role in ensuring proper communication between the various sensors in the system, allowing for accurate emission control.
Common Causes of P1019 GMC
- Faulty Sensor: A malfunctioning sensor within the Reductant Control Module can disrupt communication and lead to high voltage levels.
- Wiring or Connector Damage: Damage to the wiring or connectors in the sensor communication circuit can cause voltage irregularities.
- Reductant Control Module Malfunction: If the module itself is faulty, it may not be able to regulate voltage levels properly.
- Electrical System Issues: Problems with the vehicle's electrical system, such as a short circuit or voltage spikes, can affect the sensor communication circuit.
- Environmental Factors: Exposure to extreme temperatures or moisture can also contribute to voltage supply circuit issues.
Symptoms of P1019 GMC
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
- Reduced Fuel Efficiency: High voltage levels in the sensor communication circuit can lead to inefficient operation of the SCR system, resulting in decreased fuel efficiency.
- Emission Control System Malfunction: Issues with the Reductant Control Module sensor communication can cause the vehicle to fail emissions tests or emit higher levels of pollutants.
- Engine Performance Issues: In some cases, the vehicle may experience rough idling, hesitation, or power loss due to the malfunctioning SCR system.
How to Fix P1019 GMC
- Diagnostic Scan: Begin by using a diagnostic scanner to retrieve the specific trouble code and identify the source of the issue within the Reductant Control Module sensor communication circuit.
- Sensor Inspection: Check the sensors within the SCR system for any signs of damage or malfunction, replacing them if necessary.
- Wiring and Connector Check: Inspect the wiring and connectors in the sensor communication circuit for damage or corrosion, repairing or replacing as needed.
- Reductant Control Module Replacement: If the module is found to be faulty, it may need to be replaced to restore proper communication and voltage regulation.
- System Reset: After completing the repairs, reset the vehicle's computer system to clear the trouble code and ensure proper operation of the SCR system.
Cost to Fix P1019 GMC
The cost of repairing a P1019 DTC for GMC vehicles can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, parts for sensor replacement or wiring repairs may range from $100 to $300, while replacing the Reductant Control Module could cost between $300 and $600. Labor costs at an auto repair shop typically range from $80 to $150 per hour, with total repair costs potentially amounting to several hundred dollars. It's advisable to consult with a trusted mechanic or dealership for a more accurate estimate based on the vehicle's make and model, as well as local labor rates.
Need more information about the P1019 GMC code?
Need more information on how to fix the P1019 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1019 GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1019 GMC Code
1. What are the common symptoms of OBDII code P1019 GMC?
- Common symptoms include the Check Engine Light (CEL) illuminating, reduced engine performance, and potential issues with the vehicle's emissions system.
2. What causes the OBDII code P1019 GMC to trigger?
- This code is typically triggered by a high voltage supply circuit issue within the reductant control module sensor communication.
3. How serious is the P1019 GMC code?
- While the severity can vary, it's important to address this code promptly as it can lead to poor engine performance and potential emissions-related problems.
4. Can I continue driving my vehicle with the P1019 GMC code?
- It is not recommended to drive the vehicle with this code active, as it can lead to further damage and potential emissions issues.
5. How can I diagnose the P1019 GMC code?
- Diagnosis usually involves using an OBDII scanner to read the code, inspecting the reductant control module sensor communication circuit, and checking for any loose connections or damaged wiring.
6. What repairs are typically needed for the P1019 GMC code?
- Repairs may involve repairing or replacing damaged wiring, connectors, or the reductant control module itself, depending on the specific issue detected.
7. Are there any DIY fixes for the P1019 GMC code?
- DIY fixes may be possible if the issue is related to a loose connection or damaged wire, but more complex repairs may require professional assistance.
8. How much does it cost to repair the P1019 GMC code?
- Repair costs can vary depending on the extent of the issue and whether any components need to be replaced, but it's advisable to get a professional diagnosis for an accurate estimate.
9. Can the P1019 GMC code be related to other codes or issues?
- Yes, this code may be related to other codes indicating issues with the vehicle's emissions system, so it's important to address any related codes as well.
10. How can I prevent the P1019 GMC code from recurring?
- Regular maintenance, such as checking and replacing faulty components in the emissions system, can help prevent the recurrence of the P1019 GMC code.
Discuss the causes and fixes for P1019 GMC OBDII Code
Code P1019 GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.