P0337 OBD-II Trouble Code: Crankshaft Position Sensor A Circuit Low Input

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0337 code

P0337 is a diagnostic trouble code (DTC) for "Crankshaft Position Sensor A Circuit Low Input". 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 P0337 DIAGNOSTIC Get a fair and transparent estimate upfront

P0337 code definition

This trouble code means that the vehicle’s crankshaft is suffering because of low voltage.

What the P0337 code means

In order for a vehicle to propel itself forward, three things are needed:

  • Fuel
  • Air
  • Spark

In modern vehicles, a third component is at work too: the ECM (Engine Control Module). To put it simply, this high-tech device is at work measuring how much fuel must be injected relative to the measured mass of air at any time. Then, it forces a spark in order to ignite a power stroke. This entire process happens hundreds of times per second.

Obviously, precise timing is necessary to pull this off over and over and over. That’s where the crankshaft and camshaft position sensors (CMP and CKP, respectively) come into play.

The CKP carries out two very important functions. It serves as a speed sensor, for one thing. The ECM relies on it for calculating the engine speed in RPM (Revolutions Per Minute). The second important function served by the CKP is as a position sensor. This makes it possible for the ECM to figure out the position of cylinder one at what’s called top-dead-center (TDC). With RPM and TDC, the ECU can maneuver the precise function we described above that’s required for a vehicle to work.

When the ECU can’t sense sufficient voltage from the CKP sensor, the P0337 code will be stored.

What causes the P0337 code?

There could actually be a number of causes behind this code, but the most common are:

  • The CKP sensor has malfunctioned or quit working altogether
  • The sensor is no longer aligned properly
  • The starter is defective or the battery is dead
  • Electrical problems like short circuits

What are the symptoms of the P0337 code?

You most likely have a P0337 problem on your hands if you experience any of the following:

  • The engine won’t start or takes a long time to do so
  • Poor fuel economy
  • Lack of power from the engine
  • Trouble accelerating
  • An engine that misfires
  • An engine that stalls

How does a mechanic diagnose the P0337 code?

Here’s how a mechanic should diagnose this problem:

  • Using the OBD-II scanner to find out which codes have been stored
  • Checking the sensors with an eye out for a misaligned gap
  • Inspecting the battery
  • Checking for short circuits and other electrical problems

Common mistakes when diagnosing the P0337 code

A lot of mechanics will replace the sensor if it’s clearly responsible as this is easy enough to do and not incredibly expensive. At most, it will cost around $100 for this part. That being said, replacement isn’t always necessary and the sensor could be fixed with nothing more than a bit of soldering.

Also, the engine needs to be checked to ensure it’s cranking over properly. The same goes for inspecting the battery. Just because it’s “working” doesn’t mean it’s working as it should.

How serious is the P0337 code?

This code doesn’t represent a problem that could get anyone hurt, but it could make starting your vehicle impossible. Even if you can get the engine to turn over, P0337 problems could end up costing you every time you fill up.

What repairs can fix the P0337 code?

More likely than not, a sensor will need to be repaired. If it does need to be replaced, the good news is that it shouldn’t cost much. There could be other electrical problems that will require replacements, but again, your budget shouldn’t hurt too much.

Additional comments for consideration regarding the P0337 code

This isn’t the kind of problem that should be ignored because it’s not nearly as severe as other common vehicle issues. As we’ve touched on above, it’s generally pretty affordable to fix P0337 problems too.

Need help with a P0337 code?

YourMechanic will actually send a certified mobile mechanic to your home or place of business to assess and repair your vehicle. We’re happy to provide you a quote upfront or schedule an appointment online to learn more about our services. We also invite you to speak with a service advisor by calling us at 1-800-701-6230.

trouble codes
Check Engine Light
Crankshaft
P0337
Sensors

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0337 code.

SCHEDULE P0337 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

5,361

Rating Summary
4,946
200
50
30
135
4,946
200
50
30
135

William

16 years of experience
64 reviews
William
16 years of experience
Jeep Grand Cherokee - Check Engine Light is on - Denver, Colorado
Couldn’t be happier with my experience with William. Will happily recommend him to everyone and will definitely be using him again. Fantastic service.

Andrian

31 years of experience
112 reviews
Andrian
31 years of experience
BMW 525i - Check Engine Light is on - Fort Lauderdale, Florida
Highly recommend Adrian for all automotive services. Very professional and extremely knowledgeable about everything related to our car. He explained everything so we knew exactly what was needed and went above and beyond to make the process easy. I would never use another person to work on our cars. EXCELLENT OVERALL!!

Brian

22 years of experience
335 reviews
Brian
22 years of experience
Chevrolet Colorado - Check Engine Light is on - Orange Park, Florida
Brian is a very experienced mechanic. Billing not so sharp. Wrong time (corona-19).to be stiff with adding up, Informing the older customers what to expect? Very sorry to say goodbye to a great mechanic!

Scott

35 years of experience
665 reviews
Scott
35 years of experience
Dodge Grand Caravan - Check Engine Light is on - Phoenix, Arizona
This is the second time I have used his service. All I can say. if he can find my mistakes, he can fix anything. Thanks once again.


More related articles

P2167 OBD-II Trouble Code: Throttle/Pedal Position Sensor E Maximum Stop Performance
P2167 P2167 code definition Throttle/Pedal Position Sensor E Maximum Stop Performance What the P2167 code means The P2167 code is a general OBD-II diagnostic trouble code (DTC) that indicates a fault with the throttle / pedal position sensor E maximum...
P2104 OBD-II Trouble Code: Throttle Actuator Control System Forced Idle
P2104 P2104 trouble code definition Throttle Actuator Control System Forced Idle What the P2104 code means P2104 is an OBD-II generic code for the engine control module (ECM) detecting a major failure in the throttle actuator control (TAC) system causing...
P0492 OBD-II Trouble Code: Secondary Air Injection System Insufficient Flow Bank
P0492 means there is a problem with the secondary air injection system, often due to intake leaks or faulty one-way check valves.

Related questions

Tranny troubles

You need to have the transmission leak from the bell housing fixed. The fluid leaking is causing the transmission shift problem. The trouble code P2271 indicates that the O2 sensor after the converter shorted rich. This may happen if transmission...

Cost estimate for rear main seal replacement

Billing question for to replace the rear main seal (rear crankshaft seal) on a 2003 Lexus GS300 with a L6-3.0L engine.

Trouble code P2015. I don't know how to fix it.

The intake manifold runner control is a system that controls amount of air entering the engine, by way of valves in each intake manifold runner. They are linked together as 4 per side, bank 1 and bank 2. The control...

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 (855) 347-2779 · hi@yourmechanic.com