Powertrain
Generic/SAE
OBD-II Fault Code
P0026: Intake Valve Control Solenoid Circuit Range/Performance (Bank 1)
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for P0026.
Transmission / driveline
Use this category to narrow your checks before replacing parts.
High
Severity is a general guide. Confirm with scan-tool data and vehicle symptoms.
What P0026 usually means
Intake Valve Control Solenoid Circuit Range/Performance (Bank 1).
Common symptoms
Check Engine light; Poor drivability or reduced fuel economy depending on fault; Harsh shifting, limp mode, slipping or delayed engagement possible
Likely causes
Low/dirty transmission fluid; Solenoid/valve body issue; Wiring fault; Internal transmission wear; Signal out of expected range; Mechanical issue affecting sensor reading; Slow/sticking actuator
Diagnostic checks
Scan all modules and record freeze-frame data before clearing codes; Check battery voltage and related fuses; Check transmission fluid level/condition using correct procedure; Scan TCM data and inspect connector/wiring; Compare live data to expected value and inspect mechanical operation
Repair guidance
Service/repair fluid or wiring issues first, test solenoid/valve body, seek transmission specialist for internal faults; Repair mechanical cause, clean/replace sticking actuator, or replace sensor after confirmation
Verification after repair
Clear code, road-test through the same drive condition, then rescan