Emissions Diagnostics & Repair
17 specialized services. ASE-certified technicians. Diagnostic-first approach.
Emissions Pre-Inspection & Readiness Check
Proactive care prevents emissions failures. Your personal mechanic, David Jr., performs a comprehensive pre-inspection, identifying potential issues before they cause a failure at the official ADEQ testing station. He then consults with you on any findings, providing a clear path to a first-time pass. Disclaimer: Apex Automotive is a diagnostic and repair facility. We do not administer, give, or conduct emissions tests. By appointment.
Smog Preparation Service
Proactive care prevents emissions failures. Your personal mechanic, David Jr., performs a comprehensive pre-inspection, identifying potential issues before they cause a failure at the official ADEQ testing station. He then consults with you on any findings, providing a clear path to a first-time pass. Disclaimer: Apex Automotive is a diagnostic and repair facility. We do not administer, give, or conduct emissions tests. By appointment.
Pass Emissions — Guaranteed
No Pass No Pay. We guarantee emissions compliance through thorough diagnosis, precise repair, code clearing, and monitor readiness. Arizona thresholds: 1996–2000 vehicles ≤2 NOT READY; 2001+ vehicles ≤1 NOT READY. Same failure recurs? Consultation free. Important: Apex Automotive prepares your vehicle to pass at an official ADEQ testing station. We are not an emissions testing facility and do not administer emissions tests. Call.
5-Gas Exhaust Analysis
A 5-gas exhaust analysis, used on pre-OBD cars (pre-1995), measures Carbon Monoxide (CO), Carbon Dioxide (CO2), Hydrocarbons (HC), Oxygen (O2), and Nitrogen Oxides (NOx) to help older cars prepare for the ADEQ Emissions inspection at an official testing station. Apex Automotive performs diagnostic analysis only — we are not an emissions testing facility.
Drive Cycle Pre-Requisites
Readiness monitor stuck? We verify all manufacturer-specific prerequisites: engine temperature, fuel level, battery voltage, tire pressure, transmission gear, and a host of others. Expert diagnostics to prepare your vehicle for a successful emissions inspection at an official testing station. Call Dave Jr.
How to Set Your Car's Emissions Drive Cycle
Repairs done? Codes cleared? Now monitors must reset to 'READY' via drive cycle. Your personal mechanic, David Jr., guides execution. Arizona standards: 1996–2000 vehicles ≤2 NOT READY allowed; 2001+ vehicles only ≤1 NOT READY allowed. Expert consultation. Note: Apex diagnoses and repairs — the actual emissions test must be performed at an official ADEQ testing station.
Emissions Diagnostic & Repair
P0171/P0174 lean, P0420/P0430 catalyst, P0442/P0455 EVAP, O2 sensors. We diagnose root cause, repair, verify codes clear & monitors set. We prepare your vehicle for a guaranteed pass at an official ADEQ emissions testing station. Important: Apex Automotive is a diagnostic and repair facility — we do not administer, perform, or conduct emissions tests. Call Dave Jr.
Catalytic Converter Replacement
Catalytic Converter Service to fix P0420 and P0430 codes with a new Three-Way OE, Direct Fit or Weld-on Catalytic Converter. Turn off Check Engine Lights and reduce HC, CO, and NOx. Our team ensures your Readiness Monitors pass so you can pass your next emissions inspection at an official testing facility. Apex Automotive diagnoses and repairs emissions-related failures — we are not an emissions testing station.
Evaporative (EVAP) System Diagnostic & Repair
EVAP codes P0442, P0455, P0456, P0460 signal canister, cap, valve faults. We diagnose gas cap, charcoal canister, purge valve, solenoid, fuel tank sensor via leak, pressure, smoke tests. Monitors set 'Ready' for emissions compliance. Expert diagnostic. Call.
Oxygen Sensor Replacement
O2 sensor codes P0130-P0141 and P0135 are symptoms, not diagnosis. We confirm sensor failure vs. wiring/circuit issues before repair. Turn off check engine lights and prepare your vehicle for emissions compliance at an official testing station. Apex does not conduct emissions tests. By appointment only. Call to schedule.
EGR System Service
EGR codes P0400/P0401 signal flow issues. We clean, test valves & sensors (P0405 position sensor). By appointment only. Call to schedule service with Dave Jr.
Fuel Tank Pressure Sensor Replacement
EVAP codes P0442, P0455, P0456 often mask fuel tank pressure sensor failure. P0460 sensor circuit codes confirm diagnosis. Expert sensor replacement & verification. Call Dave Jr.
Check Engine Light Diagnostics
We diagnose these and other MIL codes: P0420 Catalyst Efficiency, P0171/P0174 System Too Lean, P0300 Misfire Detected, P0442/P0455/P0456 EVAP System Leak Detected, P0301–P0308 Cylinder Misfires, P0128 Coolant Temperature, P0135 O2 Sensor Heater Circuit, P0101 Mass Air Flow, P0401 EGR. Expert diagnosis to prepare your vehicle for emissions compliance.
Instrument Panel Warning Light Resolution
Expert resolution for dash warning lights, including TPMS, ABS, Traction Control, and Airbag indicators. We pinpoint electronic and sensor faults to restore your vehicle's safety and performance and help prepare for emissions compliance. By appointment only for dedicated expert attention. Call now to schedule.
ECU & Module Programming — Domestic
ECU & Module Programming: Expert coding, flashing, and software updates using J2534 Pass-Thru. We utilize OEM platforms: GM Techline Connect (SPS2), Ford FJDS/FDRS, and Stellantis wiTECH 2.0. By appointment only for dedicated expert attention to your vehicle's electronics. Call now to schedule.
ECU & Module Programming — European
Euro ECU & Module Programming: Expert coding and flashing for BMW, VW/Audi, and Mercedes using J2534 Pass-Thru. We utilize OEM platforms: BMW ISTA, VW/Audi ODIS & VAG, and Mercedes XENTRY for precise software updates. By appointment only for dedicated expert attention. Call now to schedule.
ECU & Module Programming — Import
Import ECU & Module Programming: Expert coding and flashing for Toyota, Honda, Nissan, Hyundai, and Kia. We utilize OEM platforms like Toyota Techstream, Honda i-HDS, and Hyundai/Kia GDS for precise software updates. By appointment only for dedicated expert attention. Call now to schedule.