A PCM Relay Replacement cost in Edmond in 2024

The average cost for a powertrain control module relay with CarAdvise is $57 and the range is generally between $29 and $242.

Get expert advice, compare prices, schedule, approve, & pay for any service at your favorite shops - guaranteed to be lower than in-store retail.

How CarAdvise Works


Find 400+ services from a network of trusted shops and book appointments in seconds.


Approve or decline an itemized list of services and costs before any work begins.


Pay securely and enjoy exclusive discounted rates and a hassle-free checkout experience.


A PCM Relay Replacement costs by shop in Edmond.

CarAdvise Customers save an average of $11 on A PCM Relay Replacement.


Average cost of A PCM Relay Replacement for popular vehicle models in Edmond:

Car Model

Avg. cost


Maintenance as it's meant to be.


Never overpay for car maintenance. Compare and select from discounted prices across 26,000+ trusted shops nationwide.


Ignite your auto knowledge. Gain invaluable insights into maintenance schedules, service clarity, and obtain expert advice.


Bypass the stress of negotiations. CarAdvise simplifies your car care journey for an effortless experience.


What is a PCM relay and how does it work?

A PCM relay is an electrical device used to switch power on and off to the powertrain control module.

Today’s vehicles rely heavily on computer controls. Depending on the vehicle make and model, the main computer that controls engine function is the engine control module, or ECM. Some manufacturers, however, include the transmission and other powertrain components under the control of the computer. In those cases, where the engine and transmission are both monitored and controlled together, a powertrain control module, or PCM, is used.

The PCM is a rather large electronic device with, in some cases, more than a hundred wires connected to it that lead to all areas of the engine and transmission. Due to the immense amount of functions of the PCM, it uses a considerable amount of electricity. The PCM is powered on when you turn the key or press a button to start the engine, but only indirectly so. That is because all of the power required for the PCM would overload the ignition switch. Therefore, a relay - the PCM relay - switches the PCM on and off instead.

As is the case with other relays, the PCM relay is essentially a large capacity switch that is “switched” by a smaller capacity circuit. In this case, a relatively small electrical current from the ignition switch is able to turn on and off the larger PCM circuit through the relay.


How do I know if my vehicle needs a PCM relay replacement?

If the PCM relay is bad, the likelihood is that the vehicle’s main computer, the PCM, will not get power. When that occurs, any sensor, module, or system that relies on the PCM will be unable to function. Because of this, a bad PCM relay can lead to any number of issues, the most likely of which include:






Your engine will not start

The engine stalls without warning

All gauges that monitor engine and transmission function cease to work

Your vehicle refuses to respond to functions as basic as turning on the ignition switch

This text is only for demo


How does a technician perform A PCM Relay Replacement ?

A PCM relay is generally located inside of a weather-sealed fuse and relay box or “block”. Replacement of a PCM relay is a relatively simple procedure. In order to replace the device, a technician will typically need to remove any components blocking access to the fuse block, remove the water-tight cover, identify the proper relay, and remove the relay with a puller tool. The new relay is plugged into the same space in the fuse/relay block, and the cover is reinstalled. The technician will likely verify the repair by road testing the vehicle and checking for any PCM-related diagnostic trouble codes with a scan tool.

Other Questions Customers Ask

What causes a PCM relay to go out?
PCM relays are usually well-isolated from water and other contaminants, such as dust and oil. Therefore, they are typically reliable throughout the lifetime of a vehicle. If a relay does fail, it is commonly from age and wear, usually after 100K miles or more. If it is overloaded with excessive current for some reason, the PCM relay could fail.
Does the powertrain control module affect the transmission?
Whether a vehicle relies on an engine control module (ECM) for engine function, or a powertrain control module (PCM) to monitor and control both the engine and transmission depends on the vehicle make and model. Some manufacturers incorporate an ECM (sometimes referred to as an engine control unit, or ECU), while others use a PCM.
Can an auto parts store test a powertrain control module or powertrain control module relay for free?
Some auto parts stores do offer what is often referred to as "code reading". However, this type of service is merely a surface-level scan, not a deep dive into diagnostics. Because of this, an auto parts store scan can lead to misdiagnosis. Most repair shops do not recommend you take your vehicle to a store where the goal is to sell parts, not offer a pinpoint diagnosis of a problem. To get a true powertrain control module (or PCM relay) diagnosis, make sure to have it done correctly by a qualified professional.

This is demo Question

This is demo Answer

Compare discounted prices at 32k+ shops.

Finding a trusted shop has never been easier. We've partnered with the largest brands in auto maintenance to give our customers the biggest network to choose from.

PepBoys Full SVG
Firestone Name SVG
Jiffy Lube Full SVG
NTB Logo SVG 1
Discount Tire Full SVG
GoodYear Logo Full SVG 1
Valvoline Name SVG
Meineke Name SVG

Trusted & partnered with leading companies.

We've earned a reputation as the go-to choice for quality car care, with some of the biggest names in business reaping the benefits and improving their customer's car care experience.


Need to talk about something?

Call us at (844) 923-8473 or email [email protected]

Join the world's largest consumer fleet.

Over 1.8 Million already have.

Own A Repair Shop?