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[Guide] How to Diagnose Check Engine Light at Home
Hassan Ali 5mo ago 5623 views 89 replies
Don't panic when that check engine light comes on! Here's how to diagnose it yourself before heading to a mechanic.
What you need:
- OBD2 scanner (Rs. 2,000-5,000 on Daraz)
- Smartphone with OBD app (Torque, Car Scanner) Common codes and meanings:
P0171/P0174 - Lean condition (check air filter, MAF sensor)
P0300-P0304 - Misfires (spark plugs, coils)
P0420 - Catalytic converter (might just need O2 sensor)
P0442 - EVAP leak (check gas cap first!) Always note the code and research before spending money at workshops. Many issues are simple fixes!
- OBD2 scanner (Rs. 2,000-5,000 on Daraz)
- Smartphone with OBD app (Torque, Car Scanner) Common codes and meanings:
P0171/P0174 - Lean condition (check air filter, MAF sensor)
P0300-P0304 - Misfires (spark plugs, coils)
P0420 - Catalytic converter (might just need O2 sensor)
P0442 - EVAP leak (check gas cap first!) Always note the code and research before spending money at workshops. Many issues are simple fixes!