P0199 OBD-II Trouble Code: Engine Oil Temperature Sensor Circuit Faulty

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0199 code

P0199 is a diagnostic trouble code (DTC) for "Engine Oil Temperature Sensor Circuit Faulty". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0199 DIAGNOSTIC Get a fair and transparent estimate upfront

P0199 code definition

P0199 is indicating a fault in the engine oil temperature sensor circuit. This code is similar to P0195, P0196, P0197, P0198.

What the P0199 code means

P0199 is found when the ECM has detected an intermittent fault in the engine oil temperature sensor. The ECM expects to see a voltage signal coming from the oil temperature sensor. When the signal is intermittently out-of-range, P0199 is set.

This condition causes a failsafe mode to be triggered and a diagnostic trouble code (DTC) set to prevent damage to the vehicle. Failsafe mode will remain in effect until the fault is resolved or normal sensor operation is detected.

What causes the P0199 code?

  • Faulty oil temperature sensor
  • Open or short in wiring harness
  • Electrical connection that is faulty or loose

What are the symptoms of the P0199 code?

The most common symptom is the ECM after the fault is detected will set a failsafe mode and cause the Check Engine Light to be illuminated on the dash. No drivability issues are normally associated with P0199.

How does a mechanic diagnose the P0199 code?

  • A technician will begin by installing an OBD-II scan tool into the vehicle's DLC port. They will then check for any code present and the freeze frame data associated with each code.

  • Next, the technician will perform a road test. Under the road test the technician will do their best to drive under the same conditions as the code was set under.

  • Once the code reappears, a visual inspection of the wiring and sensor itself will be performed to look for anything damaged, broken, or abnormal.

  • If there is nothing found during the visual inspection, a test will be performed on the engine oil temperature sensor using the scan tool. This scan tool will monitor changes in voltage and readings over time and will allow the technician to recognize any underlying issues.

Common mistakes when diagnosing the P0199 code

Not following steps in the proper order or skipping steps is the most common mistake made when diagnosing this code.

How serious is the P0199 code?

The most serious side effect of P0199 is the oil temperature sensor not working. The temperature sensor is needed to prevent engine damage in case of the vehicle overheating and is a critical component in normal vehicle operation. The only symptom that is noticed in most cases is the Check Engine Light illuminated on the dashboard.

What repairs can fix the P0199 code?

Additional comments for consideration regarding the P0199 code

P0199 is a generic code that is commonly seen - especially on higher mileage or older vehicles.

With P0199 being an intermittent issue, it can be difficult to track down at times. An advanced level scan tool is required to diagnose this code. These advanced scanners are able to track and graph changes in sensor data that are especially useful in circumstances where intermittent issues are present.

Need help with a P0199 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
P0199
Check Engine Light

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0199 code.

SCHEDULE P0199 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,064

Rating Summary
4,665
194
48
27
130
4,665
194
48
27
130

Mario

8 years of experience
22 reviews
Mario
8 years of experience
Chrysler PT Cruiser - Check Engine Light is on - Los Angeles, California
He was very courteous and knowledgeable. You can tell he knows his trade. Satisfied with his service.

Yoel

8 years of experience
91 reviews
Yoel
8 years of experience
Nissan Versa Note - Check Engine Light is on - Upper Darby, Pennsylvania
Yoel is very competent and provides great customer service. He took the time to explain and show me exactly what was going with my car. I will definitely use him again and recommend him to others.

Jason

31 years of experience
148 reviews
Jason
31 years of experience
Ford Explorer - Check Engine Light is on - Phoenix, Arizona
Jason was on time, friendly, explained everything he was doing and let me know the other services available, so when Jason comes back to install the new part I am having the oil changed too.

DeVaughn

25 years of experience
1 reviews
DeVaughn
25 years of experience
BMW X3 - Check Engine Light is on - Moreno Valley, California
The mechanic arrived on time, completed the work, which was replacement of an oxygen sensor, in a timely and professional manner.


More related articles

P0122 OBD-II Trouble Code: Throttle Pedal Position Sensor/Switch (TPS) A Circuit Low Input
P0122 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Low Input What the P0122 code means The P0122 is the generic...
P2197 OBD-II Trouble Code: O2 Sensor Signal Stuck Lean Bank 2 Sensor 1
P2197 code definition O2 Sensor Signal Stuck Lean Bank 2 Sensor 1 What the P2197 code means This code is usually an...
P2035 OBD-II Trouble Code: Exhaust Gas Temperature (EGT) Sensor Circuit Low Voltage Bank 2 Sensor 2
P2035 P2035 code definition Exhaust Gas Temperature (EGT) Sensor Circuit Low Voltage Bank 2 Sensor 2 Bank 2 refers to the back of cylinders without the number one cylinder. Sensor 2 would be the second EGT sensor from the motor...

Related questions

Prnds flashing lights anb p0777 code

Hello. For this vehicle, it appears that the solenoids are located inside the transmission. For many vehicles the transmission control solenoids are bolted to the exterior of the transmission, however for this vehicle the solenoids are part of the transmission...

Two mechanics have not been able to repair misfire.

Hi there. Check the intake for a possible vacuum leak around the cylinder 4. If there is no vacuum leak around the cylinder number 4, then there could be a burned valve. Check the compression on all of the cylinders...

What causes code Code 00543 and how to fix?

Hello. The code 00543 stands for "Engine speed to max exceeded". Meaning the computer has detected the engine has crossed over 7200RPMs due to an operating fault. Since you were simply starting the vehicle and backing it up, it is...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com