The P0520 code indicates an issue with the oil pressure sensor or its circuit on a Chrysler 200. It is commonly caused by a faulty sensor or wiring, but it can also signal actual low oil pressure. Addressing it promptly is important to protect the engine.
On the Chrysler 200, as with many modern vehicles, the engine control module monitors the oil pressure sensor to ensure proper lubrication. When the sensor circuit malfunctions, the powertrain control module (PCM) may trigger the P0520 diagnostic trouble code (DTC) and illuminate the check engine light or the oil pressure warning. This article explains what P0520 means in this vehicle, typical causes, how to diagnose it, and recommended next steps.
Understanding what P0520 means for your Chrysler 200
P0520 is a generic OBD-II code that points to the oil pressure sensor/switch circuit. It does not by itself prove there is no oil pressure; rather, it indicates a fault in the sensor, its wiring, or the circuit that feeds the PCM. In some cases, actual low oil pressure can trigger related warnings, so it’s wise to verify oil levels and quality before assuming a sensor fault.
Common causes of P0520 on a Chrysler 200
Below is a list of typical culprits that trigger P0520. Each item can individually or collectively cause the PCM to register a fault in the oil pressure sensor circuit.
- Faulty oil pressure sensor or sending unit
- Worn or corroded sensor connector or ground connection
- Low or dirty engine oil, or incorrect oil viscosity
- Oil pump failure or oil pressure relief valve sticking
- Electrical interference or PCM/ECM glitches
Faults in any of these areas can trigger P0520, and multiple issues can coexist. If the engine is suffering from low oil pressure, that is a serious condition that requires immediate attention.
Diagnosing P0520 on the Chrysler 200
Diagnosing P0520 involves a mix of quick checks and more detailed testing. The goal is to determine whether the problem is sensor/wiring related or an actual oil pressure issue.
- Check the engine oil level, condition, and viscosity. If the oil is low or excessively dirty, top up or replace as needed and recheck for code reset.
- Inspect the oil pressure sensor and wiring harness for damage, corrosion, or loose connections. Pay attention to the sensor's ground connection.
- Use a professional scan tool to read live data for oil pressure versus engine RPM. Compare readings to factory specifications at various speeds. If pressure is outside spec, further mechanical diagnosis is warranted.
- Inspect the oil pump, oil passages, and relief valve if live data suggests abnormal pressure. A failing pump or valve can cause genuine low pressure.
- Check for other related codes (e.g., P0521, P0522) that might point to sensor range or input issues. Consider reset and retest after repairs.
- If sensor and wiring appear sound but oil pressure remains questionable, replace the sensor as a relatively common failure point, then recheck the system.
After diagnosing, it’s important to address the root cause. If the data indicates genuine low oil pressure, stop driving the vehicle and perform a thorough inspection or professional service to prevent engine damage.
What to do if you see P0520 on your Chrysler 200
Immediate steps involve verifying oil health and planning a diagnostic path. A cautious approach reduces the risk of engine damage and unnecessary part replacements.
Recommended actions
- Check oil level and health: top off if low and replace if dirty or degraded
- Inspect sensor wiring and connectors for looseness or corrosion
- Consider a professional oil pressure test with a mechanical gauge to confirm actual oil pressure
- Scan for additional codes and perform recommended repairs based on findings
- If in doubt or the oil pressure is confirmed low, avoid driving the vehicle until repaired
In many cases, replacing the faulty oil pressure sensor or repairing wiring resolves P0520. If the issue is actual low oil pressure, the repair may involve the oil pump, relief valve, or engine internals.
Summary
P0520 on a Chrysler 200 signals an oil pressure sensor/switch circuit problem. The fault can stem from a bad sensor, damaged wiring or connector, or genuine low oil pressure caused by pump or lubrication system issues. Diagnosis should start with oil health checks and wiring inspection, followed by live oil pressure testing. Depending on findings, repairs may involve sensor replacement, wiring repairs, or more extensive engine lubrication system work. Prompt attention is important to protect the engine and avoid costly damage.
What happens if you drive while it shows P0520?
Driving with the P0520 code is not recommended. While the error code could simply be the result of a faulty signal and the engine may still run, inaccurate oil pressure readings could also mask actual oil pressure issues, increasing the risk of severe engine damage.
How much does it cost to fix a P0520 code?
Module repair is often temporary; replacement of the affected control module typically costs $600‑$900 plus $200‑$300 labor.
How to fix code P0520 chrysler 200?
Fixes and Repairs for a P0520 Code
- A bad oil pressure switch can be removed and a new one installed.
- Low engine oil or a clogged oil filter often necessitates an oil change.
- Damaged wiring can be repaired using a soldered connection and heat shrink.
How much does it cost to replace the oil pressure sensor on a Chrysler 200?
The average cost for a Chrysler 200 Oil Pressure Sensor Replacement is between $163 and $208.