P146D GMC Code - EVAP Purge System Pressure Sensor Circuit Low Voltage
Quick Answer
The EVAP Purge System Pressure Sensor is a 3-wire piezo-resistive pressure transducer integrated into the Evaporative Emission Purge Pump. Common causes include Faulty Evaporative Emission Purge Pump, Evaporative Emission Purge Pump harness is open or shorted, Evaporative Emission Purge Pump 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
- P146D GMC indicates EVAP Purge System Pressure Sensor Circuit Low Voltage.
- Common causes
- Common causes include Faulty Evaporative Emission Purge Pump, Evaporative Emission Purge Pump harness is open or shorted, Evaporative Emission Purge Pump 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 P146D GMC Description
What are the Possible Causes of the DTC P146D GMC?
- Faulty Evaporative Emission Purge Pump
- Evaporative Emission Purge Pump harness is open or shorted
- Evaporative Emission Purge Pump circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P146D 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 P146D 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.
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Frequently Asked Questions about P146D GMC Code
1. What are the common symptoms of OBDII code P146D GMC related to the EVAP purge system pressure sensor circuit low voltage?
- Common symptoms include rough idling, poor fuel efficiency, stalling, and the illumination of the check engine light.
2. What are the possible causes of OBDII code P146D GMC indicating a low voltage in the EVAP purge system pressure sensor circuit?
- Causes may include a faulty pressure sensor, damaged wiring or connectors, a vacuum leak in the EVAP system, or a malfunctioning PCM.
3. How can I diagnose the source of OBDII code P146D GMC for the EVAP purge system pressure sensor circuit low voltage?
- Diagnosis typically involves using a scan tool to retrieve the code, inspecting the EVAP system components for leaks, testing the pressure sensor, and checking the wiring for continuity and voltage.
4. Are there any simple repair tips for addressing OBDII code P146D GMC in the EVAP purge system pressure sensor circuit?
- Basic repair steps may involve checking and replacing damaged wiring or connectors, repairing vacuum leaks in the EVAP system, and testing or replacing the pressure sensor if necessary.
5. Can driving with OBDII code P146D GMC related to the EVAP purge system pressure sensor circuit low voltage cause further damage to the vehicle?
- Continuing to drive with this code may lead to decreased fuel efficiency, potential engine performance issues, and the risk of failing emissions tests, but it is unlikely to cause immediate severe damage.
6. How critical is it to address OBDII code P146D GMC indicating low voltage in the EVAP purge system pressure sensor circuit?
- While the vehicle may still be operable with this code present, addressing it in a timely manner is important to ensure optimal fuel efficiency, engine performance, and compliance with emissions regulations.
7. Can I reset the check engine light after repairing OBDII code P146D GMC for the EVAP purge system pressure sensor circuit low voltage?
- Yes, the check engine light can be reset using an OBDII scan tool after repairing the issue causing the code P146D GMC.
8. Is it recommended to attempt repairing OBDII code P146D GMC related to the EVAP system pressure sensor circuit low voltage on my own?
- If you have experience with automotive diagnostics and repairs, you may attempt to address this code on your own. Otherwise, consulting a professional mechanic is advisable to ensure proper diagnosis and repair.
9. How long does it typically take to repair OBDII code P146D GMC for the EVAP purge system pressure sensor circuit low voltage?
- The repair time can vary depending on the exact cause of the issue, but it may take anywhere from 1 to 3 hours to diagnose and resolve the problem.
10. Are there any preventive maintenance measures I can take to avoid encountering OBDII code P146D GMC in the future?
- Regularly inspecting the EVAP system components for signs of wear or damage, ensuring proper sealing of the system, and promptly addressing any related warning lights can help prevent the recurrence of this code.
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