AutoCodes – Chevrolet – P1AC6 Chevrolet

P1AC6 Chevrolet Code - Drive Motor 1 Control Module Crankshaft Position Sensor Circuit

Quick Answer

The Crankshaft Position (CKP) Sensor circuits consist of an Engine Control Module (ECM) supplied 5-volt reference circuit, low reference circuit and an output signal circuit. Common causes include Faulty Drive Motor Generator Power Inverter Control Module (PIM), Drive Motor Generator Power Inverter Control Module (PIM) harness is open or shorted, Drive Motor Generator Power Inverter Control Module (PIM) circuit poor electrical connection. 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: P1AC6 Chevrolet indicates Drive Motor 1 Control Module Crankshaft Position Sensor Circuit.
Common causes: Common causes include Faulty Drive Motor Generator Power Inverter Control Module (PIM), Drive Motor Generator Power Inverter Control Module (PIM) harness is open or shorted, Drive Motor Generator Power Inverter Control Module (PIM) circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,105

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 Mar 01, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1AC6 Chevrolet Description

The Crankshaft Position (CKP) Sensor circuits consist of an Engine Control Module (ECM) supplied 5-volt reference circuit, low reference circuit and an output signal circuit. The CKP sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor detects magnetic flux changes of the teeth and slots of a 58-tooth reluctor wheel on the crankshaft. Each tooth on the reluctor wheel is spaced at 60-tooth spacing, with 2 missing teeth for the reference gap. The CKP sensor produces an ON/OFF DC voltage of varying frequency, with 58 output pulses per crankshaft revolution. The frequency of the CKP sensor output depends on the velocity of the crankshaft. The CKP sensor sends a digital signal, which represents an image of the crankshaft reluctor wheel, to the ECM as each tooth on the wheel rotates past the CKP sensor. The ECM uses each CKP signal pulse to determine crankshaft speed and decodes the crankshaft reluctor wheel reference gap to identify crankshaft position. This information is then used to sequence the ignition timing and fuel injection events for the engine. The ECM also uses CKP sensor output information to determine the crankshaft relative position to the camshaft, to detect cylinder misfire, and to control the CMP actuator if equipped.
Motor Control Module (MCM) 1 is also connected to the CKP sensor signal and low reference circuits. The MCM uses the CKP sensor output information to determine engine crankshaft position to aid in smooth engine Auto-starts.

OBDII Code P1AC6 Chevrolet - Drive Motor 1 Control Module Crankshaft Position Sensor Circuit - AutoCodes.com — P1AC6 Chevrolet Code - Drive Motor 1 Control Module Crankshaft Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P1AC6 Chevrolet?

Faulty Drive Motor Generator Power Inverter Control Module (PIM)
Drive Motor Generator Power Inverter Control Module (PIM) harness is open or shorted
Drive Motor Generator Power Inverter Control Module (PIM) circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1AC6 Chevrolet?

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 does this mean?

Code Tech Notes

If codes P0335 or P0336 are set, diagnose them prior to diagnosing this code.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1AC6 Chevrolet 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 P1AC6 Chevrolet code?

Need more information on how to fix the P1AC6 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1AC6 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 P1AC6 Chevrolet Code

1. What are common symptoms of OBDII code P1AC6 in a Chevrolet related to the Drive Motor 1 Control Module Crankshaft Position Sensor Circuit?

Common symptoms include engine stalling, rough idling, poor acceleration, and potentially difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1AC6 in a Chevrolet?

Potential causes include a faulty crankshaft position sensor, issues with the drive motor control module, wiring or connection problems, or a malfunctioning engine control module.

3. How can I diagnose the cause of OBDII code P1AC6 in my Chevrolet?

Diagnosis typically involves using a scan tool to retrieve the specific trouble codes, testing the crankshaft position sensor for proper function, inspecting the wiring and connections for any damage, and potentially checking the drive motor control module.

4. Can I still drive my Chevrolet with OBDII code P1AC6 present?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potential safety hazards. It is best to address the issue promptly.

5. How can I repair OBDII code P1AC6 related to the Drive Motor 1 Control Module Crankshaft Position Sensor Circuit in my Chevrolet?

Repair options may include replacing the faulty crankshaft position sensor, addressing any issues with the drive motor control module, repairing damaged wiring or connections, or reprogramming the engine control module if necessary.

6. Is it possible to reset OBDII code P1AC6 in a Chevrolet without fixing the underlying issue?

Resetting the code without fixing the root cause will likely result in the code reappearing once the vehicle is driven again. It is important to address the underlying issue to prevent further problems.

7. Can a DIY enthusiast fix OBDII code P1AC6 in a Chevrolet, or is it best left to professional mechanics?

While some aspects of diagnosing and repairing this code may be within reach of a DIY enthusiast with the right tools and knowledge, more complex issues may require the expertise of a professional mechanic.

8. How much does it typically cost to repair OBDII code P1AC6 in a Chevrolet at a repair shop?

The cost of repairs can vary depending on the specific cause of the code and the labor rates of the repair shop. It is advisable to obtain quotes from different shops to compare prices.

9. Are there any preventive measures to avoid OBDII code P1AC6 in a Chevrolet related to the Drive Motor 1 Control Module Crankshaft Position Sensor Circuit?

Regular maintenance, such as checking and replacing sensors as recommended by the manufacturer, can help prevent issues that may lead to this trouble code.

10. How urgent is it to address OBDII code P1AC6 in a Chevrolet once it appears?

It is advisable to address this code as soon as possible to prevent potential engine performance issues, further damage, and safety concerns while driving.