P0370 Code: Timing Reference High Resolution Signal “A” Malfunction

The crankshaft position sensor sends a signal to the powertrain control module (PCM). This helps the computer monitor engine revolutions per minute (RPMs) and crank position. If the crankshaft position sensor is unable to send a signal to the PCM, on-board diagnostics (OBD) will log a P0370 code.

What Does the P0370 Code Mean?

Diagnostic trouble code (DTC) P0370 stands for “Timing Reference High Resolution Signal ‘A’ Malfunction.”

The crankshaft position sensor works together with the camshaft position sensor to help the PCM determine the correct firing sequence, which in turn controls injector and ignition timing.

A working magnetic crankshaft position sensor should produce an alternating current as the engine is cranked. The crankshaft position sensor then sends that signal to other control modules, such as the fuel injection control module.

A corrupt signal to the fuel injection control module will cause the PCM to set code P0370.

Note: The definition of code P0370 might be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0370 Code?

• Crankshaft position sensor failure
• Wiring issues
• Fuel injection control module failure
• Powertrain control module failure

What are the Common Symptoms of the P0370 Code?

• Illuminated check engine light
• No-start condition
• Decreased engine performance

How to Diagnose the P0370 Code

DTC P0370 is a generic powertrain code that vehicles with an OBD-II system can log. While this might be the case, keep in mind that the steps for diagnosis and repair can vary, depending on vehicle specifications.

Diagnosing trouble codes such as P0370 might involve the use of a scan tool and require you to inspect the affected system for signs of damaged wiring. If you’re not familiar with the diagnostic process, it’s best to have a trained professional do the work for you.

How to Fix the P0370 Code

Attempting to fix a P0370 code can be confusing and frustrating especially if you don’t have the right tools and technical knowledge. It can even lead to complications if done incorrectly. Under these circumstances, it’s best to bring your vehicle to a certified mechanic to ensure all protocols and steps are followed correctly.

But if you have some experience in dealing with trouble codes, then you already know that there’s no such thing as a magic bullet that will resolve all DTCs for all makes and models. So before you begin, it’s best to source vehicle-specific repair information from guides like Chilton or an ALLDATA subscription. This will ensure that you’re following repair steps that are tailor-fit for your vehicle.

Fixing DTC P0370 with a Replacement Crankshaft Position Sensor

If your PCM ever logs DTC P0370, it’s worth inspecting the crankshaft position sensor to see if it’s damaged or malfunctioning. Bad sensors are one of the most common causes for a P0370 to be set, and replacing them should fix the problem.

It’s not a good idea to delay clearing this code because it might lead to serious engine performance issues. The good news is that with just a few clicks, you can order a replacement crankshaft position sensor from CarParts.com!

A team of industry professionals handpicks and vets all products in our catalog. These parts are sourced from today’s top brands and are manufactured in world-class facilities using the most advanced technologies. The best part? We buy them in bulk and pass on the savings to you.

Start shopping by downloading our mobile app or visiting our website. Use our vehicle selector to check for fitment, and toggle our search filters to shop by brand or price range.

Need parts for urgent repairs? Orders are shipped from strategically located distribution centers to guarantee that your orders arrive in as fast as two business days. 
Shop and order your new crankshaft position sensor today!