P0520 GMC Code - Engine Oil Pressure Switch Circuit
Quick Answer
The Powertrain Control Module (PCM) monitors the signal circuit of the Engine Oil Pressure (EOP) sensor. Common causes include Faulty Engine Oil Pressure (EOP) Switch, Engine Oil Pressure Switch harness is open or shorted, Engine Oil Pressure Switch 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
- P0520 GMC indicates Engine Oil Pressure Switch Circuit.
- Common causes
- Common causes include Faulty Engine Oil Pressure (EOP) Switch, Engine Oil Pressure Switch harness is open or shorted, Engine Oil Pressure Switch 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 P0520 GMC Description
What are the Possible Causes of the DTC P0520 GMC?
- Faulty Engine Oil Pressure (EOP) Switch
- Engine Oil Pressure Switch harness is open or shorted
- Engine Oil Pressure Switch circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
- Faulty Instrument Panel Cluster (IPC)
How to Fix the DTC P0520 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 P0520 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 P0520 GMC Code
1. What does the OBDII code P0520 mean on a GMC?
P0520 indicates a problem with the engine oil pressure switch circuit, often related to incorrect or no signal being sent to the engine control module (ECM).
2. What are the common symptoms of code P0520 on a GMC vehicle?
Symptoms may include an illuminated check engine light, erratic or low oil pressure readings, engine performance issues, and, in some cases, engine knocking or overheating.
3. What causes the P0520 code on a GMC?
Common causes include a faulty oil pressure sensor, wiring issues like damaged or corroded connectors, low engine oil levels, or an oil pump malfunction.
4. Can low engine oil cause the P0520 code to appear?
Yes, insufficient engine oil can lead to low oil pressure, which may trigger the P0520 code.
5. How do you diagnose the P0520 code on a GMC?
Diagnosis involves checking the oil level and condition, inspecting the oil pressure sensor and wiring for damage, and, if needed, using a mechanical oil pressure gauge to confirm actual engine oil pressure.
6. Can driving with the P0520 code damage my GMC engine?
Yes, driving with this code can be risky if the issue is related to low oil pressure, as it can cause severe engine damage.
7. How do you fix the P0520 code on a GMC vehicle?
Repairs may include replacing the oil pressure sensor, repairing damaged wiring or connectors, addressing oil pump issues, or performing an oil change if the oil is dirty or low.
8. Is the P0520 code specific to GMC vehicles?
No, the P0520 code is a generic OBDII code that can appear on many vehicle makes, but the troubleshooting and repair process may vary slightly for GMC models.
9. What tools are needed to fix the P0520 code on a GMC?
You may need an OBDII scanner, a multimeter, basic hand tools, and potentially a mechanical oil pressure gauge for accurate diagnosis.
10. How much does it cost to repair the P0520 code on a GMC?
Repair costs vary depending on the issue, but replacing an oil pressure sensor typically costs $50–$200, including parts and labor.
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