Engine-Codes - Generic - P1091

P1091 Code - VVEL Actuator Motor Relay Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|P1091 code possible causes

  • Faulty VVEL Actuator Motor Relay
  • VVEL Actuator Motor Relay harness is open or shorted
  • VVEL Actuator Motor Relay circuit poor electrical connection
  • Faulty VVEL Control Module
  • Faulty Engine Control Module (ECM)

|How is the P1091 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the cost to diagnose the P1091 code

Labor: 1.0

The cost to diagnose the P1091 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are P1091 code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What is P1091 code meaning?

VVEL (Variable Valve Event & Lift) is a system that controls valve event and valve lift continuously. Rotational movement of the drive shaft equipped with eccentric cam is transmitted to output cam via the rocker arm and two kinds of links to depress the intake valve. The Engine Control Module (ECM) decides the target valve lift according to the driving condition and sends the command signal to the VVEL control module. The VVEL control module controls the rotation of the control shaft using the VVEL actuator motor and changes the movement of the output cam by shifting the link supporting point. As a result, valve lift changes continuously to improve engine output and response.
Power supply for the VVEL actuator motor is provided to the VVEL control module via VVEL actuator motor relay. VVEL actuator motor relay is ON/OFF controlled by the VVEL control module. In addition, when the VVEL actuator motor relay cannot be controlled by the VVEL control module for some reason, it ON/OFF controlled by ECM.

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|P1091 code information for specific makes

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