P0375 OBD-II Trouble Code: Timing Reference High Resolution Signal B Malfunction

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

SCHEDULE P0375 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0375 code

P0375 is a diagnostic trouble code (DTC) for "Timing Reference High Resolution Signal B Malfunction". 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 P0375 DIAGNOSTIC Get a fair and transparent estimate upfront

P0275 code definition

If a PCM stores the P0275 code, it means it has detected a problem with the high resolution timing reference signal. “Signal B” is a reference to the location of the system circuitry and not a particular component.

What the P0275 code means

Your vehicle was made with an optical sensor that is responsible for providing high resolution signals to the PCM (Powertrain Control Module). Specifically, it does this by counting pulses on the vehicle’s sensor disk, installed in the injection pump.

These high resolution inputs are one of the most important the PCM receives as it directly affects the module’s ability to fuel timing and control. For every pump cam pulse, the number of pulses detected is counted and compared to how many should have occurred. If the number counted is abnormal, then the PCM will store the P0275 trouble code.

What causes the P0275 code?

The majority of the time, the P0275 code is stored because of one of the following common causes:

  • A faulty camshaft
  • A defective crankshaft
  • Faulty distributor position sensors

This last reason is especially likely if your vehicle is rear-wheel drive and high in mileage. Other reasons that could be responsible involve the vehicle’s wiring. Damaged, corroded or otherwise faulty wiring and/or connectors could also trigger the code.

Although it’s happened, PCM failure is very unlikely and an extremely rare reason for P0275 to be stored.

What are the symptoms of the P0275 code?

Unfortunately, one of the biggest challenges with the P0275 code is that although it can have potentially serious symptoms, it can also be very difficult to detect until it’s too late and you’re facing expensive repairs. Furthermore, the Check Engine Light may not even come on until at least a few failure cycles occur (this differs by model).

More serious symptoms are things like engines misfiring or spark knocking. This last symptom occurs when your fuel simply detonates at random times. Aside from the noise you’ll hear, it also means that your fuel efficiency is seriously suffering.

Even if spark knocks don’t occur, poor fuel efficiency is another sign that your vehicle may be suffering from issues related to P0275.

How does a mechanic diagnose the P0275 code?

A qualified mechanic will use a scanner to grab the code from your vehicle’s PCM. They will probably also use a tachometer to see what happens when your vehicle is cranked.

If they do this and no RPM signal is registered, the mechanic will then inspect the vehicle’s crankshaft position sensor, crankshaft gear, and sensor connector for any indication that damage has occurred which would lead to code P0275. Wires and other electrical components will be examined for the same reason.

If those steps fail to satisfactorily diagnose the problem, they’ll use an oscilloscope to test the CPS signal wire of your vehicle for adequate waveforms during every engine resolution.

Common mistakes when diagnosing the P0275 code

When mechanical distributor failure is responsible for causing P0275, a fairly common mistake during the diagnosis process is immediately blaming the camshaft, distributor sensors or crankshaft. As a result, they sometimes get replaced for no reason.

How serious is the P0275 code?

Given how severe some of the worst symptoms of problems connected to P0275 can be, this is one you’ll want to get checked by a professional mechanic right away. Although it’s not life-threatening, you’d hate for this problem to progress into something that could become dangerous.

What repairs can fix the P0275 code?

Your mechanic may do any of the following to clear P0275:

Additional comments for consideration regarding the P0275 code

Need help with a P0275 code?

If your vehicle isn’t working correctly because of issues connected to the P0275 code, YourMechanic is here to help. Just fill out our online form to set an appointment or receive a free quote. You can also call us at 1-800-701-6220 to speak with one of our service advisors.

P0375
trouble codes
Check Engine Light

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

SCHEDULE P0375 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

4.8/5

Number of Reviews

4,810

Rating Summary
4,424
187
47
28
124
4,424
187
47
28
124

Joel

19 years of experience
741 reviews
Joel
19 years of experience
Acura RL - Check Engine Light is on - Jacksonville, Florida
very knowledgeable and precise. able to fix electrical issues in my car. Right on time for the appointment.

Christopher

15 years of experience
41 reviews
Christopher
15 years of experience
Honda Accord - Check Engine Light is on - Fairburn, Georgia
Christopher was excellent! He explained everything in detail to make sure I understood. He was professional and provided me with the next course of actions to resolve my care issues. I'm glad he was sent to service my car.

Alexander

18 years of experience
58 reviews
Alexander
18 years of experience
Saab 9-7x - Check Engine Light is on - Kissimmee, Florida
He was very friendly and very helpful . I felt like it was being around a close friend , also gave me so very good advice on my car & future advice about it . Highly recommend mechanic, would use his services again .

Matthew

31 years of experience
639 reviews
Matthew
31 years of experience
Jeep Patriot - Check Engine Light is on - Norfolk, Virginia
Matthew was on time which was a relief, he is very knowledgeable and was easy to understand what was wrong and what was being done. I am recommending to friends and family due to the great experience Matthew gave me. Extremely professional 10/10

More related articles

P2274 OBD-II Trouble Code: O2 (Oxygen) Sensor Signal Stuck Lean Bank 1 Sensor 3
P2274 P2274 code definition O2 (Oxygen) Sensor Signal Stuck Lean Bank 1 Sensor 3 What the P2274 code means This code definition indicates that either the oxygen sensor has failed, there is an exhaust leak before the sensor, or the...
P0361 OBD-II Trouble Code: Ignition Coil K Primary / Secondary Circuit Malfunction
Trouble code P0361 means that a malfunction in an ignition coil, often due to an open or short in the driver circuit.
P2776 OBD-II Trouble Code: Upshift Switch Circuit Low
P2776 means a problem signal was detected from the upshift switch circuit usually due to electrical issues or liquid being spilled on the switch.

Related questions

I think that my car has thrown a rod - 2006 Pontiac Torrent

Hi there. If you noticed a large hole on the side of the engine's block and it's leaking a lot of oil, it is highly likely that a connecting rod snapped and "windowed" the block. Unfortunately, there is no repair...

Air conditioner not working after a battery change

Hello. Thank you for writing in. At first, disconnect the battery and verify that all of the wires in the starting system and charging system are clean, dry, and tight. Make sure the battery cables are corrosion free, and have...

signs

The anti-lock brake system uses sensors in the wheels and other inputs to help control the wheels from sliding, locking up, and to help control the car under certain driving conditions. Issues with the system could include these sensors, any...

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