AutoCodesChevrolet – P1018 Chevrolet

P1018 Chevrolet Code - Reductant Control Module Sensor Communication Voltage Supply Circuit Low Voltage

Quick Answer

The Reductant Quality Sensor is located in the reductant tank and uses an ultrasonic signal to measure reductant fluid quality. Common causes include Faulty Reductant Control Module, Reductant Control Module harness is open or shorted, Reductant Control Module 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
P1018 Chevrolet indicates Reductant Control Module Sensor Communication Voltage Supply Circuit Low Voltage.
Common causes
Common causes include Faulty Reductant Control Module, Reductant Control Module harness is open or shorted, Reductant Control Module 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.
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Code Popularity 1,159
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 24, 2021
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Code P1018 Chevrolet Description

The Reductant Quality Sensor is located in the reductant tank and uses an ultrasonic signal to measure reductant fluid quality. The Reductant Quality Sensor includes an integrated temperature sensor to measure reductant fluid temperature. The Reductant Quality Sensor communicates with the Reductant Control Module using serial data. The Diagnostic Trouble Code (DTC) will be set if the reductant control module detects a short to ground on the 5 V reference circuit for greater than 1 s.
OBDII Code P1018 Chevrolet - Reductant Control Module Sensor Communication Voltage Supply Circuit Low Voltage - AutoCodes.com
P1018 Chevrolet Code - Reductant Control Module Sensor Communication Voltage Supply Circuit Low Voltage

What are the Possible Causes of the DTC P1018 Chevrolet?

  • Faulty Reductant Control Module
  • Reductant Control Module harness is open or shorted
  • Reductant Control Module circuit poor electrical connection
  • Faulty Reductant Quality Sensor

How to Fix the DTC P1018 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1018 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 P1018 Chevrolet code?

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Need Help with the Code?

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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 P1018 Chevrolet Code

What does the OBDII code P1018 mean for a Chevrolet vehicle?

The P1018 code indicates that there is a low voltage issue in the reductant control module sensor communication voltage supply circuit, which can affect the vehicle’s emissions system.

What are common symptoms of the P1018 code?

Common symptoms include reduced engine performance, warning lights on the dashboard, and potential failure to pass emissions tests.

What can cause the P1018 code to trigger?

Causes may include a faulty reductant control module, damaged wiring or connectors, low battery voltage, or issues with the vehicle’s power supply circuits.

How can I diagnose the P1018 code?

Start by checking the battery voltage and connections, inspect the wiring and connectors for damage, and test the reductant control module for proper operation.

What repairs are typically needed for the P1018 code?

Repairs may involve replacing the reductant control module, repairing or replacing damaged wiring or connectors, or addressing any power supply issues.

Can I drive my Chevrolet with a P1018 code?

While it may be possible to drive, it is not recommended as it could lead to further engine performance issues and may cause emissions system failures.

How can I clear the P1018 code from my vehicle?

You can clear the code using an OBDII scanner after resolving the underlying issue; however, it is important to ensure the problem is fixed to prevent the code from reappearing.

Is the P1018 code serious?

Yes, the P1018 code is serious as it can affect vehicle performance and emissions control, potentially leading to more significant issues if not addressed.

Will the P1018 code affect my vehicle's fuel economy?

Yes, if the code is present, it may lead to inefficient engine operation, which can ultimately result in decreased fuel economy.

Discuss the causes and fixes for P1018 Chevrolet OBDII Code

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