P204A GMC Code - Reductant Pressure Sensor Circuit
Quick Answer
The Reductant Pressure Sensor, located in the Reductant Pump and Sensor Assembly, responds to pressure changes in the reductant system. Common causes include Faulty Reductant Pressure Sensor, Reductant Pressure Sensor harness is open or shorted, Reductant Pressure Sensor circuit poor electrical connection. 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
- P204A GMC indicates Reductant Pressure Sensor Circuit.
- Common causes
- Common causes include Faulty Reductant Pressure Sensor, Reductant Pressure Sensor harness is open or shorted, Reductant Pressure Sensor circuit poor electrical connection.
- 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.
Code P204A GMC Description
connected to the Reductant Control Module via the Controller Area Network (CAN) bus. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the reductant pressure sensor signal is open or shorted to ground.
What are the Possible Causes of the DTC P204A GMC?
- Faulty Reductant Pressure Sensor
- Reductant Pressure Sensor harness is open or shorted
- Reductant Pressure Sensor circuit poor electrical connection
How to Fix the DTC P204A GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P204A GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P204A GMC code?
Need more information on how to fix the P204A GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P204A GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P204A GMC Code
1. What are common symptoms of OBDII code P204A GMC (Reductant Pressure Sensor Circuit)?
- Common symptoms include the check engine light illuminating, reduced engine performance, and potential issues with the vehicle's emission system.
2. What are the possible causes of OBDII code P204A GMC?
- The code may be triggered by a faulty reductant pressure sensor, damaged wiring or connectors in the sensor circuit, or issues with the reductant system components.
3. How can I diagnose the cause of OBDII code P204A GMC?
- Diagnostic steps may involve using an OBDII scanner to retrieve the code, checking the reductant pressure sensor for proper operation, inspecting related wiring and connectors for damage, and testing the reductant system components.
4. Can I drive my vehicle with OBDII code P204A GMC?
- It is not recommended to drive the vehicle with this code present, as it can lead to decreased engine performance and potential damage to the emission system. It's advisable to address the issue promptly.
5. How can I repair OBDII code P204A GMC?
- Repair options may include replacing the faulty reductant pressure sensor, repairing damaged wiring or connectors, and addressing any issues with other reductant system components as needed.
6. Will resetting the check engine light resolve OBDII code P204A GMC?
- Simply resetting the check engine light will not fix the underlying issue causing the code. It's important to diagnose the problem, make necessary repairs, and clear the code properly.
7. How much does it cost to fix OBDII code P204A GMC?
- The cost of repairs can vary depending on the specific cause of the code, the labor rates in your area, and whether any parts need to be replaced. It's best to consult a mechanic for an accurate estimate.
8. Can OBDII code P204A GMC cause a vehicle to fail an emissions test?
- Yes, this code is related to the vehicle's emission system, and if left unresolved, it can cause the vehicle to fail an emissions test due to increased emissions and improper operation.
9. Are there any preventive measures to avoid OBDII code P204A GMC?
- Regular maintenance of the emission system components and addressing any related issues promptly can help prevent the occurrence of this code.
10. Is OBDII code P204A GMC common in certain GMC models?
- This code may be more common in specific GMC models equipped with reductant systems, such as certain diesel trucks or SUVs.
Discuss the causes and fixes for P204A GMC OBDII Code
Code P204A 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.
