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.
1995 Ford Probe Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Reference Chart
DIAGNOSTIC TROUBLE CODES REFERENCE CHART
| DTC | Description | Circuit Test/Step: KOEO | Circuit Test/Step: KOER | Circuit Test/Step: CONT. | |||
|---|---|---|---|---|---|---|---|
| No Code | No Codes/Codes Not Listed | QA1 | QA1 | QA1 | |||
| 111 | System Pass | Pass | Pass | Pass | |||
| 112 | Intake Air Temperature Sensor Circuit Low Input | DA20 | - | DA90 | |||
| 113 | Intake Air Temperature Sensor Circuit High Input | DA10 | - | DA90 | |||
| 114 | Intake Air Temperature Sensor Circuit Voltage Higher Or Lower Than Expected | DA1 | DA1 | - | |||
| 116 | Engine Coolant Temperature Sensor Circuit Voltage Higher Or Lower Than Expected | DA1 | DA1 | - | |||
| 117 | Engine Coolant Temperature Sensor Circuit Low Input | DA20 | - | DA90 | |||
| 118 | Engine Coolant Temperature Sensor Circuit High Input | DA10 | - | DA90 | |||
| 121 | Throttle Position Sensor Fault | DH 2 | DH 1 | G 1 | |||
| 122 | Throttle Position Sensor Circuit Low Input | DH10 | - | DH94 | |||
| 123 | Throttle Position Sensor Circuit High Input | DH3 | - | DH90 | |||
| 124 | Throttle Position Sensor Voltage Higher Than Expected | - | - | G1 | |||
| 125 | Throttle Position Sensor Voltage Lower Than Expected | - | - | G1 | |||
| 126 | Manifold Absolute Pressure/Barometric Pressure Sensor Circuit Voltage Higher/Lower Than Expected | DF1 | DF1 | DF90 | |||
| 128 | Manifold Absolute Pressure Sensor Vacuum Hose Damaged/Disconnected | - | - | DF11 | |||
| 129 | Insufficient Mass Air Flow Change During Dynamic Response Test KOER | - | DC13 | - | |||
| 136 | System Indicates Lean (Bank 2) | - | H1 | - | |||
| 137 | System Indicates Rich (Bank 2) | - | H1 | - | |||
| 139 | No Heated Oxygen Sensor (HO2S-2) Switches Detected (Bank 2) | - | - | H1 | |||
| 141 | Fuel System Indicates Lean | - | - | H1 | |||
| 144 | No Heated Oxygen Sensor (HO2S-1) Switches Detected (Bank 1) | - | - | H1 | |||
| 157 | Mass Air Flow Sensor Circuit Low Input | - | - | DC10 | |||
| 158 | Mass Air Flow Sensor Circuit High Input | DC22 | - | DC22 | |||
| 159 | Mass Air Flow Sensor Circuit Voltage Higher Or Lower Than Expected | DC1 | DC1 | - | |||
| 167 | Insufficient Throttle Position Change During Dynamic Response Test KOER | - | DH20 | - | |||
| 171 | Fuel System At Adaptive Limits (Bank 1) | - | - | H1 | |||
| 172 | System Indicates Lean (Bank 1) | - | H1 | H1 | |||
| 173 | System Indicates Rich (Bank 1) | - | H1 | H1 | |||
| 174 | Fuel Control | - | - | H1 | |||
| 175 | Fuel System At Adaptive Limits (Bank 2) | - | - | H1 | |||
| 176 | System Indicates Lean (Bank 2) | - | - | H1 | |||
| 177 | System Indicates Rich (Bank 2) | - | - | H1 | |||
| 178 | Fuel Control | - | - | H1 | |||
| 179 | Fuel System At Lean Adaptive Limit At Part Throttle, System Rich (Bank 1) | - | - | HA1 | |||
| 181 | Fuel System At Rich Adaptive Limit At Part Throttle, System Lean (Bank 1) | - | - | HA1 | |||
| 184 | Mass Air Flow Sensor Voltage Higher Than Expected | - | - | G7 | |||
| 185 | Mass Air Flow Sensor Voltage Lower Than Expected | - | - | G7 | |||
| 186 | Injector Pulsewidth Higher Than Expected | - | - | G9 | |||
| 187 | Injector Pulsewidth Lower Than Expected | - | - | G7 | |||
| 188 | Fuel System At Lean Adaptive Limit At Part Throttle, System Rich (Bank 2) | - | - | HA1 | |||
| 189 | Fuel System At Rich Adaptive Limit At Part Throttle, System Lean (Bank 2) | - | - | HA1 | |||
| 194 | Fuel Control | - | - | H5 | |||
| 195 | Fuel Control | - | - | H5 | |||
| 211 | |||||||
| With Distributor Ignition | Profile Ignition Pickup Circuit Failure | - | - | NA1 | |||
| With Electronic Ignition | Profile Ignition Pickup Circuit Failure | - | - | NC1 | |||
| 212 | |||||||
| With Distributor Ignition | Loss Of Ignition Diagnostic Monitor Input To PCM/SPOUT Circuit Grounded | - | - | NA2 | |||
| With Electronic Ignition | Loss Of Ignition Diagnostic Monitor Input To PCM/SPOUT Circuit Grounded | - | - | NC3 | |||
| 213 | |||||||
| With Distributor Ignition | SPOUT Circuit Open | - | PA1 | - | |||
| With Electronic Ignition | SPOUT Circuit Open | - | PC1 | - | |||
| 214 | Cylinder Identification Circuit Failure | - | - | DR1 | |||
| 215 | Coil 1 Primary Circuit Failure | - | - | (1) | |||
| 216 | Coil 2 Primary Circuit Failure | - | - | (1) | |||
| 217 | Coil 3 Primary Circuit Failure | - | - | (1) | |||
| 218 | Loss Of Ignition Diagnostic Monitor Signal (Left Side) | - | - | (1) | |||
| 222 | Loss Of Ignition Diagnostic Monitor Signal (Right Side) | - | - | (1) | |||
| 223 | Loss Of Dual Plug Inhibit Control | - | - | (1) | |||
| 224 | Coil 1/2/3/4 Primary Circuit Failure | - | - | (1) | |||
| 225 | Knock Not Sensed During Dynamic Response Test | - | DG1 | - | |||
| 226 | Ignition Diagnostic Monitor Signal Not Received | NC2 | - | - | |||
| 232 | Coil 1/2/3/4 Primary Circuit Failure | - | - | (1) | |||
| 238 | Coil 4 Primary Circuit Failure | - | - | (1) | |||
| 244 | Coil 4 Primary Circuit Failure | - | DR1 | - | |||
| 326 | |||||||
| Probe | Exhaust Gas Recirculation Circuit Voltage Lower Than Expected | - | - | DB10 | |||
| Contour/Mystique | Exhaust Gas Recirculation Circuit (DPFE) Voltage Lower Than Expected | - | DL22 | - | |||
| 327 | |||||||
| Probe | Exhaust Gas Recirculation Circuit Below Minimum Voltage | DD1 | DD1 | DD90 | |||
| Contour/Mystique | Exhaust Gas Recirculation Circuit (DPFE) Below Minimum Voltage | DL1 | DL22 | DL90 | |||
| 328 | Exhaust Gas Recirculation Closed Valve Voltage Lower Than Expected | DN25 | DN25 | DN90 | |||
| 332 | |||||||
| Probe | Insufficient Exhaust Gas Recirculation Flow | - | DD30 | DD100 | |||
| Contour/Mystique | Insufficient Exhaust Gas Recirculation Flow | - | DL30 | DL90 | |||
| 334 | Exhaust Gas Recirculation Closed Valve Voltage Higher Than Expected | DN20 | DN20 | DN115 | |||
| 335 | Exhaust Gas Recirculation Sensor Voltage Higher/Lower Than Expected | DL8 | - | - | |||
| 336 | Exhaust Pressure High/Exhaust Gas Recirculation (DPFE) Circuit Voltage Higher Than Expected | - | DL50 | DL90 | |||
| 337 | |||||||
| Probe | Exhaust Gas Recirculation Circuit Above Maximum Voltage | DD10 | DD10 | DD90 | |||
| Contour/Mystique | Exhaust Gas Recirculation Circuit (DPFE) Above Maximum Voltage | DL5 | DL50 | DL90 | |||
| 338 | Engine Coolant Temperature Lower Than Expected | - | - | DA100 | |||
| 339 | Engine Coolant Temperature Higher Than Expected | - | - | DA101 | |||
| 341 | Octane Adjust Service Pin Open | KP1 | - | - | |||
| 411 | Cannot Control RPM During KEOR Low RPM Check | - | KE15 | - | |||
| 412 | Cannot Control RPM During KEOR High RPM Check | - | KE1 | - | |||
| 452 | Insufficient Input From Vehicle Speed Sensor To Powertrain Control Module | - | - | DP1 | |||
| 511 | Powertrain Control Module Read Only Memory Test Failure (KOEO) | Replace PCM | Replace PCM | Replace PCM | |||
| 512 | Powertrain Control Module Keep Alive Memory Test Failure | - | - | QB1 | |||
| 513 | Powertrain Control Module Internal Voltage Failure (KOEO) | QD1 | QD1 | QD1 | |||
| 519 | |||||||
| Probe | Power Steering Pressure Switch Circuit Open | FF10 | - | - | |||
| Contour/Mystique | Power Steering Pressure Sensor Circuit Open | DT1 | DT1 | DT1 | |||
| 521 | |||||||
| Probe | Power Steering Pressure Switch Circuit Did Not Change States | - | FF20 | - | |||
| Contour/Mystique | Power Steering Pressure Sensor Circuit Did Not Change States | - | DT1 | - | |||
| 522 | Vehicle Not In PARK Or NEUTRAL During KOEO | TD1 | - | - | |||
| 525 | Vehicle In Gear / A/C On | TA1 | - | TA1 | |||
| 528 | Clutch Pedal Position Switch Circuit Failure | - | - | TA1 | |||
| 529 | Data Communication Link Or Powertrain Control Module Circuit Failure | - | - | ML25 | |||
| 532 | Cluster Control Assembly Circuit Failure | - | - | ML25 | |||
| 533 | Data Communication Link Or Electronic Instrument Cluster Circuit Failure | - | - | ML25 | |||
| 536 | Brake On/Off Circuit Failure / Not Actuated During KOER | - | FD1 | FD90 | |||
| 538 | Insufficient RPM Change Or Invalid Cylinder Balance Test | - | M1 | - | |||
| 539 | |||||||
| Probe | A/C On / Defrost On During KOEO | KM70 | - | - | |||
| Countour/Mystique | A/C On / Defrost On During KOEO | KM40 | KM40 | - | |||
| 542 | Fuel Pump Circuit Open - Powertrain Control Module To Motor Ground | J10 | - | J90 | |||
| 543 | Fuel Pump Circuit Open - Battery To Powertrain Control Module | J20 | - | J93 | |||
| 551 | Idle Air Control Circuit Failure | KT1 | - | - | |||
| 554 | Fuel Pressure Regulator Control Circuit Failure | KN1 | - | - | |||
| 556 | Fuel Pump Relay Primary Circuit Failure | J1 | - | - | |||
| 558 | Exhaust Gas Recirculation Vacuum Regulator Circuit Failure | DL11 | - | - | |||
| 559 | Air Conditioning On Relay Circuit Failure | KM60 | - | - | |||
| 563 | High Fan Control Circuit Failure | KF1 | - | - | |||
| 564 | Fan Control Circuit Failure | KF1 | - | - | |||
| 565 | Canister Purge Circuit Failure | KD6 | - | - | |||
| 566 | 3-4 Shift Solenoid Circuit Failure | TC1 | - | - | |||
| 569 | Auxiliary Canister Purge Circuit Failure | KD6 | - | - | |||
| 571 | EGR Atmospheric Pressure Supply Solenoid Circuit Failure | DD20 | - | - | |||
| 572 | EGR Vacuum Supply Solenoid Circuit Failure | DD20 | - | - | |||
| 593 | Heated Oxygen Sensor Heater Circuit Failure | H40 | - | H40 | |||
| 617 | 1-2 Shift Error | - | - | TG90 | |||
| 618 | 2-3 Shift Error | - | - | TG90 | |||
| 619 | 3-4 Shift Error | - | - | TG90 | |||
| 621 | Shift Solenoid 1 Circuit Failure | TC1 | - | - | |||
| 622 | Shift Solenoid 2 Circuit Failure | TC1 | - | - | |||
| 623 | Transmission Control Indicator Lamp Circuit Failure | TB3 | - | - | |||
| 624 | Electronic Pressure Control Circuit Failure | TC 10 | - | TG 90 | |||
| 625 | Electronic Pressure Control Driver Open In Powertrain Control Module | TC 10 | - | TG 90 | |||
| 626 | Coast Clutch Solenoid Circuit Failure | TC1 | - | - | |||
| 628 | Excessive Converter Clutch Slippage | - | - | TG90 | |||
| 629 | Torque Converter Clutch Solenoid Circuit Failure | TC 1 | - | TG 90 | |||
| 631 | Transmission Control Indicator Lamp Circuit Failure | TB3 | - | - | |||
| 632 | Transmission Control Switch Circuit Did Not Change States During KOER | - | TB 2 | NA 2 | |||
| 634 | Transmission Range Voltage Higher/Lower Than Expected | TD 1 | - | TG 90 | |||
| 636 | Transmission Fluid Temperature Higher Or Lower Than Expected | TE1 | TE1 | - | |||
| 637 | Transmission Fluid Temperature Sensor Circuit High Input/Circuit Open | TE 10 | - | TG 90 | |||
| 638 | Transmission Fluid Temperature Sensor Circuit Low Input/Circuit Shorted | TE 20 | - | TG 90 | |||
| 639 | Insufficient Input From Turbine Shaft Speed Sensor | - | TF1 | TF90 | |||
| 641 | Shift Solenoid 3 Circuit Failure | TC1 | - | - | |||
| 643 | Coast Clutch Solenoid Circuit Failure | TC20 | - | TC30 | |||
| 645 | Incorrect Gear Ratio - 1st Gear | - | - | TG90 | |||
| 646 | Incorrect Gear Ratio - 2nd Gear | - | - | TG90 | |||
| 647 | Incorrect Gear Ratio - 3rd Gear | - | - | TG90 | |||
| 648 | Incorrect Gear Ratio - 4th Gear | - | - | TG90 | |||
| 649 | Electronic Pressure Control Higher Or Lower Than Expected | - | - | TG90 | |||
| 651 | Electronic Pressure Control Circuit Failure | - | - | TG90 | |||
| 652 | Torque Converter Clutch Solenoid Circuit Failure | TC1 | - | - | |||
| 654 | Transmission Range Sensor Indicating Not In PARK During Self-Test | TD1 | - | - | |||
| 656 | Torque Converter Clutch Slippage | - | - | TG90 | |||
| 657 | Transmission Overtemperature | - | - | TE100 | |||
| 659 | High Vehicle Speed In Park | - | - | TG90 | |||
| 667 | Transmission Range Circuit Voltage Below Minimum Voltage | TD 1 | TD 1 | TG 90 | |||
| 668 | Transmission Range Circuit Voltage Above Maximum Voltage | TD 1 | TD 1 | TG 90 | |||
| 675 | Transmission Range Sensor Circuit Voltage Out Of Range | - | - | TG90 | |||
| 998 | Hard Fault Present - FMEM Mode | TC 10 | (2) FMEN | (2) FMEN | |||
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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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