Q. My engine rpm has changed to 1100 and at randome settles higher then normal 700.Abs and engine light also comes on when i have this issue, Service center can not resolve it, I have clocked almost 1.5 lac km any idea.?

Thanks for the detailed info — the symptoms you described (high/random RPM, ABS + engine light, unresolved by service center, and 150,000+ km mileage) point to a few **likely culprits**:---### **1. Vacuum Leak or Intake Air Leak**- Causes erratic or high idle RPM.- Could be a cracked hose, intake manifold gasket, or PCV valve.**Check:** All vacuum lines for cracks or looseness.---### **2. Faulty Idle Air Control Valve (IAC) or Throttle Body**- If dirty or failing, it can cause inconsistent idle.- Sometimes cleaning the throttle body helps, especially after high mileage.---### **3. Mass Air Flow (MAF) Sensor**- A dirty or failing MAF can mess with the air-fuel ratio and cause erratic RPMs.- May not always throw a clear code.---### **4. Bad Ground/Electrical Connection**- Can trigger **both ABS and engine light** randomly.- Check for corrosion on the battery terminals, engine ground, or ECU connectors.---### **5. Alternator or Battery Voltage Issues**- Voltage fluctuations can cause weird electronic behavior and ABS faults.- Get the battery and alternator tested — especially if original.---### **6. ABS Wheel Speed Sensor Interference**- A failing wheel speed sensor could cause both ABS light and engine RPM issues (some ECUs use wheel speed data for idle smoothing in modern cars).---### **Next Steps:**- Get a **full OBD-II scan** with a good scanner (not just a basic code reader).- Ask for a **live data log** while the problem happens — it may show strange sensor values (like RPM, throttle position, or air flow).- If service center is stuck, consider a trusted local specialist or auto electrician — this feels like a combo of mechanical + electrical fault.

We recommend visiting your nearest authorized service center to have your car thoroughly inspected, as the trained technicians there will be best equipped to assist you. If the issue still persists after inspection, we suggest reaching out to the brand directly for further support.You can find the nearest service center by clicking the link below and selecting your city accordingly: https://www.zigwheels.com/service-centers/mahindra