AutoCodes – Generic – P1CC8

P1CC8 Code - Low Battery Voltage-Main Micro Processor Supply Shorted To Ground Or Open

Quick Answer

This diagnostic detects if the power supply to Main Micro Processor (MMP) is too low with three different tests relative to different vehicle operating conditions. Common causes include Low Battery Charge, Faulty Transmission Controller Module (TCM), Transmission Controller Module (TCM) harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1CC8 indicates Low Battery Voltage-Main Micro Processor Supply Shorted To Ground Or Open.
Common causes: Common causes include Low Battery Charge, Faulty Transmission Controller Module (TCM), Transmission Controller Module (TCM) harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,405

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1CC8 Description

This diagnostic detects if the power supply to Main Micro Processor (MMP) is too low with three different tests relative to different vehicle operating conditions. The MMP power supply is tested outside the engine cranking mode (because in this condition a brief reduction of power supply may be possible). The first check: the Transmission Controller Module (TCM) compares the MMP power supply with minimum threshold values. When the actual value of power supply is below its minimum boundary the diagnostic will be considered failing. The second check: the TCM verifies the MMP power supply is not lower than a threshold for more than an amount of time after the engine cranking mode is finished plus a time delay. The third check: the TCM verifies the MMP power supply is not lower than a threshold for more than an amount of time after the engine cranking mode is finished plus a time delay only when the hydraulic pump is on for more than a time and the pump temperature is lower than a value.

OBDII Code P1CC8 - Low Battery Voltage-Main Micro Processor Supply Shorted To Ground Or Open - AutoCodes.com — P1CC8 Code - Low Battery Voltage-Main Micro Processor Supply Shorted To Ground Or Open

What does this mean?

What are the Possible Causes of the DTC P1CC8?

Low Battery Charge
Faulty Transmission Controller Module (TCM)
Transmission Controller Module (TCM) harness is open or shorted
Transmission Controller Module (TCM) circuit poor electrical connection

How to Fix the DTC P1CC8?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1CC8 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1CC8 code?

Need more information on how to fix the P1CC8 code? Get Access to Factory Service Manuals

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Information for Specific Makes

P1CC8 Chrysler — Low Battery Voltage-Main Micro Processor Supply Shorted To Ground Or Open
P1CC8 Dodge — Low Battery Voltage-Main Micro Processor Supply Shorted To Ground Or Open
P1CC8 Fiat — Low Battery Voltage-Main Micro Processor Supply Shorted To Ground Or Open
P1CC8 Jeep — Low Battery Voltage-Main Micro Processor Supply Shorted To Ground Or Open

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1CC8 Code

1. What are the common symptoms of OBDII code P1CC8?

- Common symptoms include a dead or weak battery, difficulty starting the vehicle, dimming lights, and issues with electrical components.

2. What causes the OBDII code P1CC8 to occur?

- This code typically occurs due to a short circuit or an open circuit in the main microprocessor's power supply, leading to low battery voltage.

3. How can I diagnose the issue related to OBDII code P1CC8?

- Diagnosing this issue usually involves checking the main microprocessor power supply circuit for shorts, opens, or other electrical faults using a multimeter and wiring diagrams.

4. Can a low battery voltage cause OBDII code P1CC8 to trigger?

- Yes, low battery voltage can trigger this code as it may indicate issues with the main microprocessor's power supply being shorted to ground or open.

5. What are the potential dangers of ignoring OBDII code P1CC8?

- Ignoring this code can lead to further electrical issues in the vehicle, causing malfunctions in critical systems controlled by the main microprocessor.

6. Is it safe to drive with OBDII code P1CC8 present?

- It is not recommended to drive with this code present, as it may result in unexpected electrical failures that could affect the vehicle's performance and safety.

7. How can I repair OBDII code P1CC8 on my own?

- Repairing this code often requires identifying and fixing the short or open circuit in the main microprocessor power supply, which may involve replacing damaged wiring or components.

8. Can a faulty alternator cause OBDII code P1CC8 to appear?

- Yes, a faulty alternator can contribute to low battery voltage, which may trigger this code if it leads to issues with the main microprocessor's power supply.

9. Are there any preventive measures to avoid OBDII code P1CC8 in the future?

- Regularly checking the vehicle's electrical system, maintaining the battery and alternator, and addressing any warning signs promptly can help prevent issues that trigger this code.

10. Should I reset the OBDII code P1CC8 after repairing the issue?

- Yes, after repairing the underlying problem causing the code, it is recommended to reset the code using an OBDII scanner to clear it from the vehicle's system.