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Address P0300 misfire by replacing worn spark plugs and testing ignition coils. Check for vacuum leaks as secondary cause of P0171 lean condition.
Est. DIY Cost: $45–$120Clean or replace MAF sensor to resolve lean fuel mixture (P0171). Dirty MAF sensors are a common cause of false lean codes.
Est. DIY Cost: $20–$80P0420 indicates reduced catalyst efficiency. Often caused by unburnt fuel from misfire damaging the converter. Fix misfire first, then reassess converter condition.
Est. DIY Cost: $250–$800 (if needed)...
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Ignition, fuel delivery, sensors, timing, compression, and exhaust diagnostics.
Automatic & manual transmission diagnostics, solenoid testing, fluid analysis, and shift pattern analysis.
ABS diagnostics, brake pad wear sensors, fluid testing, rotor measurement, and caliper assessment.
Battery testing, alternator output, wiring diagnostics, module communication, and fuse/relay testing.
Alignment checks, strut/shock assessment, power steering diagnostics, and sensor calibration.
A/C pressure testing, blower motor diagnostics, heater core assessment, and climate control module testing.