P0393 OBD-II Trouble Code: Camshaft Position Sensor "B" Circuit High (Bank 2)

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0393 code

P0393 is a diagnostic trouble code (DTC) for "Camshaft Position Sensor "B" Circuit High (Bank 2)". 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 $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 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 $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE P0393 DIAGNOSTIC Get a fair and transparent estimate upfront

P0393 code definition

The P0393 code is stored when the PCM detects an abnormally high voltage reading from the camshaft position sensor circuit for camshaft sensor B in engine bank 2. This code may be stored with crankshaft sensor codes.

What the P0393 code means

The PCM monitors the camshaft position to ensure that the engine is running at optimal levels. If the PCM detects a voltage reading from engine bank 2’s camshaft position sensor B circuit, which is more than 10% higher than the manufacturer’s specifications, the P0393 code will be stored.

What causes the P0393 code?

The most common cause of the P0393 code is damaged electrical components, such as wiring, due to leaking oil or other engine fluid. Other causes may include:

  • Contaminated engine fluid
  • Bad camshaft sensors
  • Bad crankshaft sensors
  • Faulty starter motor
  • Weak battery
  • Faulty starting system circuit

What are the symptoms of the P0393 code?

Some vehicle owners may only notice the illumination of the Check Engine Light. However, others may experience symptoms such as a total loss of power, a stalled engine, choppy acceleration, or rough idling.

How does a mechanic diagnose the P0393 code?

After verifying the P0393 code with an OBD-II scanner, the mechanic should begin by looking for leaking fluid that could have caused shorts or corrosion within the electrical components. Any issues should be repaired, and the code should be cleared from the system. If the code reappears after a retest, the mechanic should then perform voltage tests on the sensor, manually comparing the information to the manufacturer’s specifications.

If the readings are within the correct limits, then the sensor needs to be replaced. However, if the readings are not within the correct limits, the mechanic should continue checking each possible cause, clearing the code and retesting the system after each attempt, to be sure that the correct solution is found.

Common mistakes when diagnosing the P0393 code

In most cases, a misdiagnosis comes in the form of a replaced sensor. It is important to diagnose every possible component, particularly the electrical components, before replacing any major part.

How serious is the P0393 code?

Without the PCM’s ability to properly control the position of the camshaft, the vehicle will experience larger problems. It is very important to address the cause of the P0393 code right away, before more damage occurs.

What repairs can fix the P0393 code?

In order to repair the P0393 code, a mechanic may attempt any of the following:

Additional comments for consideration regarding the P0393 code

If either the camshaft or the crankshaft sensors are faulty in the case of the P0393 code, it is best to replace both units at the same time. Most manufacturers report that these two components work best when the wear is identical.

Need help with a P0393 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.

Check Engine Light
trouble codes
P0393

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0393 code.

SCHEDULE P0393 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P2405 OBD-II Trouble Code: EVAP Leak Detection Pump Control Circuit Low
P2405 code definition Evaporative Emission Control System (EVAP) Leak Detection Pump Control Circuit Low What the P2405 code means P2405 is an OBD-II generic code for the Engine Control Module (ECM) detecting that the evaporative system leak detection...
P0488 OBD-II Trouble Code: Exhaust Gas Recirculation Throttle Control Circuit "A" Range/Performance
What What the P0488 code means The Powertrain Control Module (PCM) has discovered a problem with the rate of flow of the exhaust gas recirculation (EGR) system. What causes the P0488 code? There are a few potential causes for the...
P0257 OBD-II Trouble Code: Injection Pump Fuel Metering Control "B" Range/Performance (Cam/Rotor/Injector)
P0257 P0257 code definition The P0257 code indicates injection pump fuel metering control “B” range/performance (cam/rotor/injector). What the P0257 code means The P0257 code means that the powertrain control module has found a discrepancy in the signal voltage that goes...

Related questions

Code for pressure solenoid D
The P2716 code is produced when the ECM has detected that the throttle body actuator motor has failed to read the correct position at which the butterfly valve within the throttle body should be in order to produce a smooth...
Signals from my purge valve sensor are intermittent says the diagnosis.
Hi and thanks for contacting YourMechanic. There could be a vacuum leak at the purge valve or around the purge valve. Look to see if the gas cap closed properly, there is no cracks or other damage on the charcoal...
Why would I have a P0014 code in my 2008 Nissan 350Z
Hello. When you get this code it is because the computer is seeing that the valve timing is off. Most of the time this is a timing solenoid issue. It can also be caused by low engine oil, a sensor...

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