A 003 446 10 02/003 CPC4

Vehicle CPC4 failure and repairs explained

The Common Powertrain Controller (CPC) is a module used in vehicle with Detroit Diesel engines. The CPC is the interface between the Motor Control Module (MCM) and the vehicle electronics system, acting as a communication gateway.

The role of the MCM is to determine and evaluate all the parameters required by the engine to function. The MCM calculates the load levels, ambient conditions and evaluates other sensors that the engine requires to function.

The values determined by the MCM are relayed over a CAN interface to the rest of the vehicle. The CPC4 functions as the gateway for the MCM to replay the information which allows the operator to control the vehicle . The CPC unit accepts other analog and digital inputs as well from the throttle, ABS, EBM, cooler level, etc which is also required by the engine and operator.

The CPC is an important gateway in the vehicle between a variety of modules. Once the CPC fails the communication between these modules is disrupted and the vehicle typically shuts down the throttle.

CPC4 Failure on a vehicle can be identified by:

• The vehicle engine does not want to start
• CPC module not correctly identified
• CPC hardware failure with SPN 609 FMI 12 fault code
• Check engine light is on
• ABS engine light due to failed CPC4 module
• DEF engine light is on

Once the vehicle CPC is repaired and reinstalled into the vehicle no additional programming is required. The vehicle will be 100% back to normal and the unit is 100% plug and play.

Service highlight:

• 100% Plug and play CPC- There is no other programming required once repaired
• 1 Day Express repair option- Most of our repairs are done within 1 day, excluding shipping
• 4-5 Day turnaround - Most of our repairs are done within 4 days, excluding shipping
• 2 Year warranty - All our CPC repairs come with a 2 year warranty.

• Can a CPC module be repaired?

Yes, a CPC4 module can be repaired. Some CPC modules require a reball of the BGA and others require board-level repairs.

When choosing a CPC repair service, always ensure that you choose a company that rebuilds the entire board and not just the BGA. Rebuilding the entire CPC takes much longer but the repair will last much longer.

We offer 3 main services for CPC4 repairs:

1. Testing of the CPC4 module for $199: This option includes a thorough diagnostic test of your CPC4 module to determine the root cause of the issue. Once the problem has been identified, our team of experienced technicians will provide you

with a detailed repair plan and cost estimate.

1. Repairs for $1999: If you choose this option, our team will complete the necessary repairs to fix your CPC4 module. We use only the highest quality replacement parts to ensure the longevity of the repair.

2. Express 1-day repairs for $2499: Need your truck back on the road as soon as possible? Choose our express repair option and we'll have your CPC4 module fixed and your truck back in action in just 24 hours.

• What is a CPC module?

The common powertrain controller (CPC) is a module that serves as a communication device between various modules in the truck. The CPC receives information from the other modules such as the MCM and ECM and calculates the power that the truck has to deliver if the throttle is pressed.

If the CPC fails or detects an internal issue it shuts down the throttle as a safety feature.

• What happens if my CPC is stolen?

If your CPC has been stolen, The ECU Pro can offer you a rebuild replacement.

We can ship a rebuilt CPC to you that has been coded to your truck within 1 business day or receiving the order.

Call us today to get your truck back on the road.

• What are the common failure symptoms of a CPC?

The most common failure symptom of a failed CPC is deal throttle. The CPC module relies on data from various modules. If the CPC fails or stops receiving data from the other modules, it shuts down the throttle. Another common failure symptom is an empty DEF gauge or if the CPC identifies as another module such as a CPC2.

If you are experiencing any of the above issues, it is recommended to read the SPN codes on the CPC with a diagnostic tool such as DDDL or Diesel Laptop. Typical SPN codes that will indicate if a CPC has failed is:

SPN 609 / FMI 12 - CPC hardware failure

SPN 3510 / FMI 4 - Accelerator pedal supply voltage failed low

SPN 91 / FMI 8 - Accelerator pedal signal 1 missing

SPN 2623 / FMI 8 - Accelerator pedal signal 2 missing

• How long does a CPC4 repair take?

The length of the repair process will depend on the specific issue with your CPC4 module and the repair option you choose. Testing of the module typically takes a few hours, while repairs and replacements can take anywhere from a few days to a week. Our express 1-day repair option is available for those who need their truck back on the road as soon as possible.

In short:  Free standard return shipping within the USA is included in all services. Optional express shipping is available at checkout. Shipping your parts to us is your responsibility. 

Last updated July 01, 2022

This Shipping & Delivery Policy is part of our Terms of Service ("Terms") and should be therefore read alongside our main Terms: https://the-ecu-pro.com/policy/terms-of-service.

Please carefully review our Shipping & Delivery Policy when purchasing our products. This policy will apply to any order you place with us.

What are the shipping and delivery options

Free Shipping

We offer free Standard 2-3 day shipping on US orders only.

Expedited Shipping Fees

We also offer expedited shipping at the following rates:

US LOCAL FedEx 1-2 days $75

If you select an expedited shipping option, we will follow up after you have placed the order with any additional shipping information.

All times and dates given for delivery of the products are given in good faith but are estimates only.

For EU and UK consumers: This does not affect your statutory rights. Unless specifically noted, estimated delivery times reflect the earliest available delivery, and deliveries will be made within 30 days after the day we accept your order. For more information please refer to our Terms.

Do you deliver internationally?

We offer worldwide shipping for a set fee of $150. Free Standard 2-3 day shipping is not valid on international orders.

Please note, that we may be subject to various rules and restrictions in relation to some international deliveries and you may be subject to additional taxes and duties over which we have no control. If such cases apply, you are responsible for complying with the laws applicable to the country where you live and will be responsible for any such additional costs or taxes.

What happens if my order is delayed?

If delivery is delayed for any reason we will let you know as soon as possible and will advise you of a revised estimated date for delivery.

For EU and UK consumers: This does not affect your statutory rights. For more information please refer to our Terms.

Questions about returns?

If you have questions about returns, please review our Return Policy: https://the-ecu-pro.com/policy/refunds.

How can you contact us about this policy?

If you have any further questions or comments, you may contact us by:

• Email: info@the-ecu-pro.com

Return policy

Last updated January 01, 2020

Thank you for your purchase. We hope you are happy with your purchase. However, if you are not completely satisfied with your purchase for any reason, you may return it to us for a full refund only. Please see below for more information on our return policy.

Retruns

All returns must be postmarked within fourteen (14) days of the purchase date. All returned items must be in new and unused condition, with all original tags and labels attached.

Return Process

Step One: Contact info@the-ecu-pro.com for returns.

You must return the items in their original package.

You must include all accessories and user manuals that came in the same package.

Where an item has been purchased as a part of a bundle of multiple items, all multiple items within that bundle must be returned.

Please treat the items with care and return them in the condition that they were delivered to you.

Replacement or refund can only be processed once we have received all the items to be returned.

If you return items 1) that you are not entitled to return, 2) that are not in their original condition, 3) that are without proper or missing packaging, 4) with items missing from the return delivery, 5) without following our return instructions, or 6) have otherwise failed to exercise reasonable care when taking care of and returning items, we reserve the right either to reject your return and decline to refund or to deduct from those payments to be refunded to you reasonable repair or other similar direct costs that we have incurred, subject to applicable law.

If your return has been accepted, we will refund you the price you have actually paid for the items less any applicable shipping costs (as per the above) by crediting your payment card thirty (30) calendar days after the date of receipt of the delivery.

Please note that The ECU PRO LLC will only process returns and refunds for items bought in this Online Shop.

Please place the item securely in its original packaging, and mail your return to the following address:

The ECU Pro

Attn: Returns

# Order number issued at checkout

181 Hills Creek Road

Wellsboro, PA 16901

United States

Please note, that you will be responsible for all return shipping charges. We strongly recommend that you use a trackable method to mail your return. 

Refunds

After receiving your return and inspecting the condition of your item, we will process your return. Please allow at least ten (10) days from the receipt of your item to process your return. Refunds may take 1-2 billing cycles to appear on your credit card statement, depending on your credit card company.

Exceptions

The following items cannot be returned:

•     All items related to the testing or repair of products which is deemed a service provided

For defective or damaged products, please contact us at the contact details below to arrange a refund or exchange.

Please Note

•        A 25% restocking fee will be charged for all returns.
•        All returns must contain detailed fault codes of the product in the vehicle

Questions

If you have any questions concerning our return policy, please contact us at:

(888)723-2080

info@the-ecu-pro.com

Warranty

All items come with a warranty. The warranty does not include any labor associated with installation and/or removal of parts, key, and/or Locksmith fees. Buyer will not be reimbursed for any such fees--NO EXCEPTIONS. Buyer hereby acknowledges and agrees that the Seller's liability is limited to the price of the item sold and Seller is not liable for any damage and/or injury sustained those results from any item(s) sold by any entity operated by The ECU Pro, LLC and Buyer hereby now and forever relinquish seller from any such liability.

Returns

Electrical parts are tested prior to purchase and if returned, all units will be inspected for burnt components, physical damage, and water damage. Returns will be processed in the order received and may have a greater handling time than order processing. The warranty shall be void if an item is returned with any signs of (a) burnt components (b)physical and/or water damage (c)misuse, abuse, modifications, opened, tampered with, and/or used for any purpose not originally intended (d)vehicle is involved in a collision or (e)security seal is removed, broken and/or damaged.

All returns must be postmarked within fourteen (14) days of the purchase date. All returned items must be in new and unused condition, with all original tags and labels attached.

Return Process

To return an item, please email customer service at info@the-ecu-pro.com to obtain a Return Merchandise Authorization (RMA) number. After receiving an RMA number, place the item securely in its original packaging, and mail your return to the following address:

Attn: Returns

RMA #

181 Hills Creek Road

Wellsboro, PA 16901

United States

Please note, that you will be responsible for all return shipping charges. We strongly recommend that you use a trackable method to mail your return.

Refunds

After receiving your return and inspecting the condition of your item, we will process your return. Please allow at least five (5) days from the receipt of your item to process your return. Refunds may take 1-2 billing cycles to appear on your credit card statement, depending on your credit card company.

Exceptions

For defective or damaged products, please contact us at the customer service number below to arrange a refund or exchange.

Please Note A 25% restocking fee will be charged for all returns.

Questions

If you have any questions concerning our return policy, please contact us at:

(888)723-2080

info@the-ecu-pro.com