P0339 OBD-II Trouble Code: Crankshaft Position Sensor A Circuit Intermittent

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0339 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0339 code

P0339 is a diagnostic trouble code (DTC) for "Crankshaft Position Sensor A Circuit Intermittent". 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 for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 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$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0339 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P0339 code definition

The P0339 code indicates that the car’s computer has detected a voltage signal from the crankshaft position sensor that exceeds the maximum variation set by the automaker.

What the P0339 code means

The P0339 code means that the car’s computer has detected a problem with the crankshaft position sensor A circuit. In this instance, it has detected a voltage reading that is higher than the maximum set by the manufacturer. Usually, the maximum allowable difference is 10% (between the actual reading and the manufacturer’s setting). Three instances are typically required to trigger the Check Engine light, but the pending code should be stored in the computer.

What causes the P0339 code?

A number of potential causes may lead to the P0339 code being set in the car’s computer, including the following:

  • Damaged crankshaft position sensor
  • Damage to the sensor’s connectors
  • Damage to the sensor’s wiring harness
  • Broken reluctor rings or missing teeth
  • Damage caused by a broken timing belt wrapping around the sensor system
  • Failed PCM (rare)

What are the symptoms of the P0339 code?

Symptoms of the P0339 code can vary considerably depending on the cause, but they include the following:

  • No noticeable symptoms
  • Check Engine light on
  • Reduced fuel economy
  • Reduced engine performance
  • Rough idling
  • Engine misfire
  • Rough acceleration
  • No start

How does a mechanic diagnose the P0339 code?

Diagnosing the P0339 code begins by connecting an OBD-II scanner to the car’s communication port. The mechanic will read the code or codes stored and then clear them. A test drive (if possible) will then need to be made to verify that the codes reset.

Next, the mechanic should inspect the wiring harness and connectors for the crankshaft position sensor. Often, the cause of the problem is actually deterioration of the wiring harness or corrosion of connections due to exposure to engine oil, which can eat through wiring covers. If damage is noted or loose connections are found, these must be replaced or repaired.

If the problem persists, the mechanic will need to test the crankshaft position sensor for operation. This may require removing the sensor from the vehicle to be tested correctly.

Common mistakes when diagnosing the P0339 code

Perhaps the most common mistake made when diagnosing the P0339 code is assuming that the problem is the crankshaft position sensor itself and not performing a complete diagnosis. One of the most common reasons for the P0339 code is actually damage to the wiring harness due to exposure to engine oil.

How serious is the P0339 code?

The P0339 code is actually very serious, even if you are not experiencing any drivability problems. In the case that the problem is caused by damage to the wiring harness or loose connections, the situation will only increase in severity, potentially leaving you stranded during a no start situation. Have the problem diagnosed immediately.

What repairs can fix the P0339 code?

Repairs needed to fix the P0339 code vary depending on the underlying cause, but can include the following:

  • Repairing or replacing damaged wiring
  • Repairing loose connections
  • Repairing oil leaks responsible for degradation of wiring
  • Replacing a failed crankshaft position sensor
  • Replacing broken reluctor rings

Additional comments for consideration regarding the P0339 code

Because there are multiple causes, and a failed sensor is not always the underlying problem, it is crucial for mechanics to perform an in-depth inspection and diagnosis of the problem. This will reduce the chance of performing an expensive repair only to find that it did not address the actual cause of the situation.

Need help with a P0339 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
Check Engine Light
P0339

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0339 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,636

Rating Summary
3,315
161
42
24
94
3,315
161
42
24
94

Breck

17 years of experience
355 reviews
Breck
17 years of experience
Very professional. He did not try to up sale the repairs needed
2008 FORD F-250 SUPER DUTY - CHECK ENGINE LIGHT IS ON - HOUSTON, TEXAS

Peter

33 years of experience
346 reviews
Peter
33 years of experience
Professional and courteous
2009 CHRYSLER ASPEN - CHECK ENGINE LIGHT IS ON - PHOENIX, ARIZONA

Fred

14 years of experience
240 reviews
Fred
14 years of experience
He's right on the only guy I want to loom at my car. Great customer service. Top fight mechanic. Will call on him soon as I need any work done on my car.
2003 ACURA TL - CHECK ENGINE LIGHT IS ON - CYPRESS, TEXAS

Nathan

26 years of experience
235 reviews
Nathan
26 years of experience
Nathan is great. He's not pushy and is truly present to fix your vehicle. I'm 100% recommending him and I will always call him for my car needs.
1999 MITSUBISHI MONTERO SPORT - CHECK ENGINE LIGHT IS ON - TULSA, OKLAHOMA

More related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Long Does a Throttle Return Spring Last?
Not all vehicles on the road feature an electronic throttle control (ETC), which is also called drive-by-wire. For vehicles that don't offer this system, they have a throttle cable instead that...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...

Related questions

Q: My truck has the trouble code P0700, what does it mean?

If you have downloaded Diagnostic Trouble Code P0700, that means a fault has been detected in one or more of the following transmission components: the transmission control module, the transmission valve body, the shift solenoid(s), and/or the wiring harness that...

Q: Q: Car starts and then turns off

I would recommend starting with having your vehicle checked for trouble codes with an OBD2 scanner. Once the codes have been pulled by a knowledgable technician, a strategic diagnosis plan can be made. The Check Engine Light code will aid...

Q: Transmission only has 1st gear

Hello. P0732 is the trouble code for an abnormal gear 2 shift ratio. If the vehicle's transmission computer detects that there is an issue with the gear ratio and timing of second gear, it will set off this code to...

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