AutoCodes – Generic – P1045

P1045 Code - Cylinder 1 Oil Supply Solenoid Valve Voltage Out Of Range

Quick Answer

Multi-Air is an electronically controlled variable intake valve phase and lift system. Common causes include Faulty Variable Valve Actuator (VVA) Solenoid, Variable Valve Actuator Solenoid harness is open or shorted, Variable Valve Actuator Solenoid 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: P1045 indicates Cylinder 1 Oil Supply Solenoid Valve Voltage Out Of Range.
Common causes: Common causes include Faulty Variable Valve Actuator (VVA) Solenoid, Variable Valve Actuator Solenoid harness is open or shorted, Variable Valve Actuator Solenoid 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 7,365

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 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1045 Description

Multi-Air is an electronically controlled variable intake valve phase and lift system. Unlike conventional intake valve phase and lift system which controls all the cylinder intake valves simultaneously and in the same proportion; Multi-Air, through the use of an electronically controlled hydraulic link between the camshaft and intake valve, allows for each intake valve to be controlled independently. The valve lift and timing can be adjusted infinitely.
The Multi-Air valve train has a mechanical camshaft lobe acting on a hydraulic pump located between the camshaft intake lobe and the intake valve. The pump provides oil under pressure to a two-way electro-hydraulic solenoid valve called the Variable Valve Actuator (VVA) Solenoid. The VVA Solenoid is electronically controlled during the specific intake cam lobe event by the Powertrain Control Module (PCM). During the event, the VVA Solenoid is commanded to either hold oil pressure or bleed oil. The Variable Valve Actuator (VVA) Solenoid is a normally open solenoid. The PCM provides 12 volts to close the solenoid. The position of the VVA Solenoid determines the intake valve timing and lift. This change on valve action is similar to creating a change in the camshaft lobe profile affecting the lift and duration of the valve opening. The Diagnostic Trouble Code (DTC) will be set when the PCM calculates that the delay in the measurement of current samples is greater that the required sampling period.

OBDII Code P1045 - Cylinder 1 Oil Supply Solenoid Valve Voltage Out Of Range - AutoCodes.com — P1045 Code - Cylinder 1 Oil Supply Solenoid Valve Voltage Out Of Range

What does this mean?

What are the Possible Causes of the DTC P1045?

Faulty Variable Valve Actuator (VVA) Solenoid
Variable Valve Actuator Solenoid harness is open or shorted
Variable Valve Actuator Solenoid circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1045?

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 P1045 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 P1045 code?

Need more information on how to fix the P1045 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1045 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1045 Chrysler — Cylinder 1 Oil Supply Solenoid Valve Voltage Out Of Range
P1045 Dodge — Cylinder 1 Oil Supply Solenoid Valve Voltage Out Of Range
P1045 Fiat — Cylinder 1 Oil Supply Solenoid Valve Voltage Out Of Range
P1045 Jeep — Cylinder 1 Oil Supply Solenoid Valve Voltage Out Of Range

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 P1045 Code

1. What are the common symptoms of OBDII code P1045?

The common symptoms of OBDII code P1045 include rough idling, engine misfires, decreased fuel efficiency, and illuminated Check Engine Light.

2. What is the likely cause of OBDII code P1045?

The most likely cause of OBDII code P1045 is a malfunctioning Cylinder 1 Oil Supply Solenoid Valve, which results in voltage being out of the specified range.

3. How can I diagnose OBDII code P1045?

To diagnose OBDII code P1045, a mechanic will typically use a scan tool to read the code, inspect the Cylinder 1 Oil Supply Solenoid Valve and its wiring for any damage or loose connections, and perform voltage tests.

4. Can driving with OBDII code P1045 cause further damage to my vehicle?

Continuing to drive with OBDII code P1045 may lead to engine performance issues and potential damage if left unresolved. It is recommended to address the issue promptly.

5. What are some repair tips for OBDII code P1045?

Repairing OBDII code P1045 may involve replacing the faulty Cylinder 1 Oil Supply Solenoid Valve, repairing any damaged wiring, or resetting the fault code after addressing the underlying issue.

6. Is it safe to continue driving my vehicle with OBDII code P1045?

While it may be possible to drive the vehicle with OBDII code P1045, it is not advisable as it can lead to further engine issues. It is recommended to have the problem diagnosed and repaired as soon as possible.

7. How much does it typically cost to repair OBDII code P1045?

The cost to repair OBDII code P1045 can vary depending on the make and model of the vehicle, the extent of the issue, and labor costs. It is advisable to consult with a mechanic for an accurate estimate.

8. Can OBDII code P1045 be a false alarm?

While rare, OBDII code P1045 can sometimes be triggered by a temporary glitch in the system. It is recommended to have the code cleared and monitor the vehicle for any recurring issues.

9. What other components should be inspected when diagnosing OBDII code P1045?

When diagnosing OBDII code P1045, it is also advisable to inspect related components such as the oil supply system, engine sensors, and the engine control module for any potential issues.

10. How can I prevent OBDII code P1045 from occurring in the future?

To prevent OBDII code P1045 from occurring in the future, it is important to follow the manufacturer's recommended maintenance schedule, address any engine performance issues promptly, and use quality engine oil.