AutoCodes – Lexus – P1081 Lexus

P1081 Lexus Code - HC Absorber Switching Valve Bank 1 Stuck Open

Quick Answer

The Engine Control Module (ECM) monitors the Exhaust Gas Temperature Sensor. Common causes include Faulty Exhaust Gas Temperature Sensor, Exhaust Gas Temperature Sensor harness is open or shorted, Exhaust Gas Temperature Sensor 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: P1081 Lexus indicates HC Absorber Switching Valve Bank 1 Stuck Open.
Common causes: Common causes include Faulty Exhaust Gas Temperature Sensor, Exhaust Gas Temperature Sensor harness is open or shorted, Exhaust Gas Temperature Sensor 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 6,213

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 May 21, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1081 Lexus Description

The Engine Control Module (ECM) monitors the Exhaust Gas Temperature Sensor. The ECM sets the Diagnostic Trouble Code (DTC) when the Exhaust Gas Temperature Sensor is not to factory specifications. HCAC (Hydro-Carbon Absorber and Catalyst System) fault detected.

OBDII Code P1081 Lexus - HC Absorber Switching Valve Bank 1 Stuck Open - AutoCodes.com — P1081 Lexus Code - HC Absorber Switching Valve Bank 1 Stuck Open

What does this mean?

What are the Possible Causes of the DTC P1081 Lexus?

Faulty Exhaust Gas Temperature Sensor
Exhaust Gas Temperature Sensor harness is open or shorted
Exhaust Gas Temperature Sensor circuit poor electrical connection
Hydro-Carbon Absorber and Catalyst (HCAC) valve stuck or actuator problem

How to Fix the DTC P1081 Lexus?

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 P1081 Lexus 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 P1081 Lexus 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.