Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1997 Ford Probe GTS, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes - 2.5L
- Introduction
- Self-Diagnostic System
- Quick Test
- Additional System Features
- On Board Diagnostic-II Monitor
- OBD-II Overview & Sensor Illustration Description
- OBD-II Drive Cycle
- Catalyst Efficiency Monitor
- Comprehensive Component Monitor
- Exhaust Gas RECIRCULATION (EGR) System Monitor-Sonic EGR
- Evaporative Emission (EVAP) Fuel Vapor Storage System Monitor
- Evaporative Emission (EVAP) Purge Flow System Monitor
- Evaporative Emission (EVAP) Vapor Management Flow System Monitor
- Evaporative Emission (EVAP) Running Loss System Monitor
- Fuel System Monitor
- Heated Oxygen Sensor Monitor
- Misfire Detection Monitor
- Secondary Air Injection System Monitor (Electric Air Pump System)
- Secondary Air Injection System Monitor (Belt Driven Air Pump System)
- OBD II-B Drive Cycle Modes
- Summary
- Diagnostic Trouble Code (DTC) Charts
- Circuit Tests
- * Please Read This First *
- How To Use Circuit Tests
- Circuit Test A - No Start Vehicle Will Not Start
- Circuit Test B - Main Power Relay
- Circuit Test C - Reference Voltage
- Circuit Test DA - Temperature Sensor (IAT & ECT)
- Circuit Test Dc - Mass Airflow (MAF) Sensor/Measuring Core-Volume Airflow Sensor (MC-VAF)
- Circuit Test Dg - Knock Sensor
- Circuit Test DH - Throttle Position (TP) Sensor
- Circuit Test Di - Switch Inputs
- Circuit Test DP - Vehicle Speed Sensor (VSS)
- Circuit Test Dr - Camshaft Position (CMP)
- Circuit Test FD - Brake On/Off (Boo) Switch
- Circuit Test Ff - Power Steering Pressure (PSP) Switch
- Circuit Test H - Fuel Control
- Circuit Test HC - Fuel Delivery System
- Circuit Test Hd - Misfire Monitor
- Circuit Test He - EGR System
- Circuit Test Hf - Catalyst Efficiency Monitor & Exhaust Systems
- Circuit Test Hg - PCV System
- Circuit Test HU - Air Intake & Throttle Body
- Circuit Test HV - Evaporative Emission System
- Circuit Test Ja - Ignition - No Spark
- Circuit Test JB - Ignition Misfire Under Load
- Circuit Test KA - Fuel Pump Relay
- Circuit Test KE - Idle Air Control/By-Pass Air Valve
- Circuit Test KF - Fan Control Relays
- Circuit Test Km - A/C Relay Circuit
- Circuit Test NB - Malfunction Indicator Light (Mil)
- Circuit Test QA - Unable To Activate Self-Test/Communication Error
- Circuit Test QC - OBD-II Monitor Testing Not Complete
- Circuit Test Z - Intermittent
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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