The P0026 diagnostic trouble code (DTC) suggests that the engine control module (ECM) has detected a fault in the operation of the solenoid responsible for controlling the flow of oil to the intake valves. Correcting this issue is crucial for maintaining engine performance, fuel efficiency, and emissions control.
P0026 quick overview
| Meaning | P0026 – Intake Valve Control Solenoid Circuit Range/Performance Bank 1 |
| Is it serious? | Yes, it can lead to engine performance issues such as rough idling, loss of power, and occasional stalling, affecting the vehicle’s drivability and efficiency. |
| Possible causes | – Faulty intake valve control solenoid – Wiring or connector issues to the solenoid – Oil flow problems affecting solenoid operation – Camshaft position sensor malfunction |
| How to diagnose? | Inspect wiring and connectors related to the intake valve control solenoid for damage or poor connections. Test the intake valve control solenoid to ensure it operates within the manufacturer’s specifications. Check the camshaft position sensor and its wiring for faults that could impact timing and solenoid control. Perform a compression test to assess the overall health of the engine and detect any potential internal issues. |
P0026 Meaning
When a P0026 code is triggered, it suggests that the solenoid controlling the intake valves isn’t functioning as expected, which can compromise engine timing and performance. This solenoid plays a critical role in adjusting the valves’ timing to optimize engine performance across various conditions.
Faults can be due to electrical issues, such as damaged wiring or poor connections, mechanical problems like a faulty solenoid, or oil pressure inconsistencies affecting the solenoid’s ability to actuate properly. Diagnosing and fixing this code often requires a comprehensive check of both the electrical circuit and the mechanical components involved in the intake valve control system.
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How to fix P0026 – learn from mechanics
I looked into P0026 service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.
Case #1: Toyota P0026
Vehicle information 2005 Toyota Camry 2.4L
Issue + repair history
- Surging at idle and loss of power during acceleration
- Previous repairs include cleaning throttle body, replacing spark plugs and ignition coils
- Current symptoms: Check Engine Light (CEL) on, codes P0026 and P0300
Other OBD2 Codes + Test Results
- P0026: Intake Valve Control Solenoid Circuit Range/Performance B1
- P0300: Random/Multiple Cylinder Misfire Detected
Mechanic suggestions
- Check wiring and connectors related to the intake valve control solenoid
- Test the intake valve control solenoid for proper operation
- Inspect the camshaft position sensor and its wiring for any issues
- Perform a compression test to ensure engine health
Final fix
- Replaced faulty intake valve control solenoid and cleared codes, issue resolved.
Case #2: Honda P0026
Vehicle information 2012 Honda Accord 2.4L
Issue + repair history
- Engine idling roughly and occasionally stalling
- Previous repairs include replacing air filter and cleaning mass airflow sensor
- Current symptoms: CEL on, codes P0026 and P0304
Other OBD2 Codes + Test Results
- P0026: Intake Valve Control Solenoid Circuit Range/Performance B1
- P0304: Cylinder 4 Misfire Detected
Mechanic suggestions
- Check for oil leaks around the intake valve control solenoid
- Test the continuity of wiring harness connected to the intake valve control solenoid
- Inspect the condition of spark plugs and ignition coils
- Perform a cylinder compression test to rule out internal engine issues
Final fix
- Replaced faulty intake valve control solenoid and addressed cylinder 4 misfire issue, cleared codes, problem resolved.
Case #3: Ford P0026
Vehicle information 2009 Ford Fusion 3.0L
Issue + repair history
- Experiencing rough idle and occasional hesitation during acceleration
- Previous repairs include cleaning throttle body and replacing fuel filter
- Current symptoms: CEL on, codes P0026 and P0302
Other OBD2 Codes + Test Results
- P0026: Intake Valve Control Solenoid Circuit Range/Performance B1
- P0302: Cylinder 2 Misfire Detected
Mechanic suggestions
- Inspect the intake valve control solenoid for any signs of damage or oil leaks
- Check the wiring harness and connectors for the intake valve control solenoid
- Test the fuel injector for cylinder 2 for proper operation
- Perform a smoke test to check for vacuum leaks
Final fix
- Replaced faulty intake valve control solenoid and addressed cylinder 2 misfire issue, cleared codes, problem resolved.
How to diagnose P0026
I made you an overview of solving this DTC, based on all the advice that was suggested by certified mechanics to address this issue in previously mentioned service cases.
| Diagnostic Step | Explanation |
|---|---|
| Inspect wiring and connectors | Check for damaged wiring or poor connections to the solenoid. |
| Test the solenoid’s operation | Ensure the solenoid operates correctly within specified ranges. |
| Examine the camshaft position sensor | Check for issues that could affect valve timing control. |
| Perform a compression test | Assess the engine’s mechanical health and uncover internal problems. |
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✅ Which OBD2 scanner is best?
✅ Which type should you get (DIY, Pro, Hobby)
✅ What is the best scanner for the exact brand/feature (e.g best for BMW)
✅ How to get a Bi-Directional tool for as cheap as $40
✅ Discount coupons for scanners
PDF is 100% free and it is designed to help you pick a scanner in less than a few minutes! Not a boring 50-page guide.
Just tell me where to send it.
Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)