🧩 Suzuki Cultus AGS Gear Shift Issue — Solved (No Error, Simple Fix)
Car: Suzuki Cultus AGS (Model 2020)
Issue: Automatic mode (D) me 2nd gear ke baad upshift nahi kar rahi thi
Manual mode: Sab gear theek lag rahe the
Scanner: No error code
Dashboard: No warning light
Problem Details:
Ek din meri Cultus AGS ne 2nd gear ke baad upshift karna band kar diya. Manual mode me sab kuch theek tha, lekin D mode me 2nd se aage nahi ja rahi thi.
Car crawl (lightly move) bhi kabhi karti thi, kabhi nahi.
Scanner lagaya, koi error nahi aya.
Mechanics ne kaha “AGS oil change karwana parega” ya “actuator calibration karni paregi”, lekin mujhe shak tha kuch aur hai.
️ Real Cause (Jo nikla):
Masla right-side brake light bulb ka tha 
Bulb ka filament andar se toot kar short ho gaya tha.
Jab headlight ON hoti thi, brake light short hone ki wajah se electric feedback mil raha tha jisse AGS samajhta tha ke brake press hai.
Is wajah se system ne upshift block kar diya (safety mode me chala gaya).
Headlight OFF karne par crawl wapas normal ho jata tha — isi se clue mila ke problem electric hai.
Fix:
Sirf right-side brake bulb change kiya (Rs. 30 ka part)
Bas, problem 100% solve ho gayi.
Koi reset, calibration, ya programming ki zarurat nahi pari.
Lesson / Tips for AGS Owners:
Agar aapki Cultus AGS upshift nahi kar rahi aur koi error nahi aa raha,
sabse pehle brake lights check karein (especially dono side bulbs).
Bulb short hone se ECU/AGS galat signal leta hai.
Mechanic ko seedha AGS open karne na dein — pehle electrical cheezein verify kar lein.
Ye problem scanner par show nahi hoti, is liye observation se diagnose hoti hai.
️ Mechanics aur owners ke liye ek note:
Suzuki AGS me brake signal aur gear logic connected hoti hai.
Agar brake bulb, fuse, ya wiring short ho jaye to system upshift band kar deta hai.
Kahi cases me Rs. 30 ka bulb, Rs. 30,000 ke repair se bachata hai
Hope this helps kisi aur ko jisko same problem ho.
Agar kisi aur ne similar experience face kiya hai to share zarur karein — shayad aur logon ka bhala ho jaye 
