P0522🔧 Engine lubrication / oil pressureStop and fix promptly

P0522: Engine Oil Pressure Sensor/Switch Low (Meaning, Causes, Fixes)

Reviewed 2026-10-25 · Based on 2 cited source(s)

What P0522 means

The oil pressure sensor (or sender) measures the engine's mechanical oil pressure and reports it to the powertrain control module (PCM) as a voltage on a 5 volt circuit. P0522 sets when the PCM sees too low a value from that sensor. On some vehicles the reading drives an oil pressure gauge; on others there's only a warning light. OBD-Codes.com calls it a generic code for 1996-and-newer vehicles that appears more often on Chevrolet, Dodge, GMC, Cadillac and Buick, lists P0520, P0521, P0523 and P0524 as related codes, and notes the GM title Engine Oil Pressure Sensor Circuit Low Input Conditions and the Chrysler title Oil Pressure Sensor Low Input Conditions. The two sources frame it a little differently. OBD-Codes.com says it's more than likely electrical, but also lists low oil level, wrong oil and an oil passage blockage, and says the engine may not start or may stall. RepairPal describes it only as the PCM detecting an incorrect signal from the sensor, lists the sensor, the PCM and wiring as the common problems, and gives the oil pressure warning light as the only symptom.

Severity: can I keep driving?

Stop and fix promptly

Both sources treat P0522 as serious. OBD-Codes.com calls it severe and says to act right away, and RepairPal rates it Urgent, its highest level. OBD-Codes.com says the cause is more than likely electrical, but warns that if oil pressure really does drop too low the engine can be permanently damaged. If the oil pressure light or gauge shows low pressure, pull over and shut the engine off as soon as it's safe, then check the oil level before driving again.

Common symptoms

Likely causes

Roughly most to least common, based on the sources below. Your vehicle may differ.

  1. Faulty oil pressure sensor or sender (both sources; RepairPal's only listed repair is replacing it)
  2. Faulty wiring or connector in the sensor circuit, including an open or short (both sources)
  3. Low oil level, wrong oil or a blocked oil passage (OBD-Codes.com only)
  4. PCM failure (RepairPal only; OBD-Codes.com mentions a TSB for certain 2011 Chrysler and Dodge vehicles fixed by reprogramming the PCM)

Diagnostic steps you can do

⚠ Before you start

Work on a cool engine, parked on level ground with the parking brake set. Never work under a car supported only by a jack.

  1. Check for technical service bulletins (TSBs) first. OBD-Codes.com notes GM bulletin PIP4786 for a number of Chevrolet, Cadillac, GMC, Pontiac, Buick and Saab vehicles, and a PCM reprogramming TSB for certain 2011 Chrysler and Dodge vehicles.
  2. With the engine off and the car on level ground, check the oil level and condition, especially if other oil-related codes are set. Make sure the oil is the correct type and weight and the oil filter isn't clogged.
  3. Inspect the wiring and connector at the oil pressure sender for broken or frayed wires, burnt spots, loose or exposed wiring. A repair manual shows where the sender is on your engine. Do the same for the wiring to the PCM.
  4. If you have a digital volt-ohm meter, test the sensor against the manufacturer's specifications (it's a 5 volt circuit), then check the wiring from the sensor to the PCM for breaks or shorts to ground from chafing or pinching, and make sure connectors are tight and corrosion free (OBD-Codes.com).

Typical fixes

Repair costs vary widely by vehicle, region, parts brand and shop, so we don't quote prices. Get a written estimate after diagnosis.

🛠 When to call a pro

  • You need the actual oil pressure tested. OBD-Codes.com says a technician may fit a mechanical oil pressure gauge and compare it with the sensor reading on an advanced scan tool
  • The oil light stays on, the engine makes unusual noises, or it stalls or won't start
  • A mechanical gauge confirms real low oil pressure, pointing to a problem inside the engine
  • The code returns after a new sensor and wiring repairs

Where to buy

Plain search links. Always match parts to your exact year, make, model and engine.

OBD2 scanners on Amazon Parts at Advance Auto Parts catalog at RockAuto

FAQs

Is P0522 serious?

Yes, treat it as serious. OBD-Codes.com calls it severe and RepairPal rates it Urgent. It's usually electrical, but real low oil pressure can permanently damage the engine, so check the oil level right away and don't keep driving with the oil light on until you know the pressure is good.

Is P0522 just a bad oil pressure sensor?

Often. OBD-Codes.com says replacing the sensor is the most likely repair, and RepairPal's only listed repair is sensor replacement. But OBD-Codes.com also lists wiring, low oil, wrong oil and a blocked oil passage, so check the oil and wiring, and confirm real pressure with a mechanical gauge if the code comes back.

What's the difference between P0522 and P0524?

P0522 means the oil pressure sensor's signal is reading too low, which is usually a sensor or wiring problem. P0524 means the sensor is reporting engine oil pressure that's actually too low, which may be a real and serious lubrication problem.

Sources

  1. OBD-Codes.com: P0522 Engine Oil Pressure Sensor/Switch Low Input
  2. RepairPal: P0522 Engine Oil Pressure Sensor/Switch Low (rated Urgent)

Last reviewed 2026-10-25. Code definitions and repair steps can vary by manufacturer. Confirm with your vehicle's service information.