AutoCodes – GMC – P2516 GMC

P2516 GMC Code - A/C Refrigerant Pressure Sensor 'B' Circuit Range/Performance

Quick Answer

The Powertrain Control Module (PCM) monitors the refrigerant pressure through the Air Condition (A/C) Pressure Sensor. Common causes include Low refrigerant, Too much refrigerant, Faulty Low Side Pressure Sensor. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P2516 GMC indicates A/C Refrigerant Pressure Sensor 'B' Circuit Range/Performance.
Common causes: Common causes include Low refrigerant, Too much refrigerant, Faulty Low Side Pressure Sensor.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 1,240

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2516 GMC Description

The Powertrain Control Module (PCM) monitors the refrigerant pressure through the Air Condition (A/C) Pressure Sensor. The PCM supplies a 5V reference and a low reference to the sensor. Changes in the A/C refrigerant pressure causes the sensor signal to the PCM to vary. When the pressure is high, the signal is high. When the pressure is low, the signal is low. The PCM sets the OBII code when the signal from the sensor is out of factory specifications.

OBDII Code P2516 GMC - A/C Refrigerant Pressure Sensor 'B' Circuit Range/Performance - AutoCodes.com — P2516 GMC Code - A/C Refrigerant Pressure Sensor 'B' Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P2516 GMC?

Low refrigerant
Too much refrigerant
Faulty Low Side Pressure Sensor
Low Side Pressure Sensor harness is open or shorted
Low Side Pressure Sensor circuit poor electrical connection

How to Fix the DTC P2516 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 P2516 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2516 GMC Code

1. What are the common symptoms of OBDII code P2516 GMC related to the A/C Refrigerant Pressure Sensor 'B' Circuit?

- Common symptoms include issues with the air conditioning system, such as insufficient cooling or inconsistent temperature control.

2. What are the possible causes of OBDII code P2516 GMC?

- Possible causes include a faulty A/C refrigerant pressure sensor, damaged wiring or connectors in the sensor circuit, or low refrigerant levels.

3. How can I diagnose the cause of OBDII code P2516 GMC?

- Diagnosing the issue involves checking the A/C refrigerant pressure sensor for proper operation, inspecting the sensor circuit for any damage, and ensuring the refrigerant levels are adequate.

4. Can driving with OBDII code P2516 GMC cause further damage to the vehicle?

- While driving with this code may not cause immediate damage, it can lead to discomfort due to A/C issues and potential long-term effects on the air conditioning system if left unresolved.

5. What are some repair tips for fixing OBDII code P2516 GMC?

- Repair tips include checking and replacing the A/C refrigerant pressure sensor if necessary, repairing any damaged wiring or connectors in the circuit, and ensuring proper refrigerant levels.

6. Is it safe to continue driving with OBDII code P2516 GMC?

- It is generally safe to drive with this code in the short term, but it is recommended to address the issue promptly to avoid potential A/C system problems.

7. Can I reset OBDII code P2516 GMC on my own?

- You can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

8. How much does it typically cost to repair OBDII code P2516 GMC?

- The cost of repair can vary depending on the specific cause of the code, but it may involve parts replacement and labor costs, which can range from $100 to $300 or more.

9. Will OBDII code P2516 GMC affect my vehicle's performance?

- While this code is related to the A/C system, it may indirectly affect performance if the A/C issues impact driver comfort or if there are underlying issues affecting the vehicle's overall operation.

10. How can I prevent OBDII code P2516 GMC from appearing again in the future?

- Regular maintenance of the A/C system, checking refrigerant levels, and promptly addressing any A/C-related issues can help prevent the recurrence of this OBDII code.