Diagnostic Trouble Code Reference Charts
WARNING: This page is about a different car, the 1995 Ford Aerostar. However, it is still accessible from the selected car via links, so may be relevant.
DTC 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 Or Lower Than Expected | DF1 | DF1 | DF90 | ||
| 128 | Manifold Absolute Pressure Sensor Vacuum Hose Damaged/Disconnected | - | - | DF11 | ||
| 129 | Insufficient Manifold Absolute Pressure/Mass Air Flow Change During Dynamic Response Test KOER | - | DF10 | - | ||
| 136 | System Indicates Lean (Bank 2) | - | H1 | - | ||
| 137 | System Indicates Rich (Bank 2) | - | 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 | ||
| 211 | Profile Ignition Pickup Circuit Failure | - | - | NA1 | ||
| 212 | Loss Of Ignition Diagnostic Monitor Input To PCM/SPOUT Circuit Grounded | - | - | NA2 | ||
| 213 | SPOUT Circuit Open | - | PA1 | - | ||
| 225 | Knock Not Sensed During Dynamic Response Test | - | DG1 | - | ||
| 311 | Secondary Air Injection System Inoperative During KOER | - | KC1 | - | ||
| 312 | Secondary Air Injection Misdirected During KOER | - | KC1 | - | ||
| 313 | Secondary Air Injection Not Bypassed During KOER | - | KC1 | - | ||
| 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 | - | - | DS1 | ||
| 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 | ||
| 522 | Vehicle Not In PARK Or NEUTRAL During KOEO | TD1 | - | - | ||
| 528 | Clutch Pedal Position Switch Circuit Failure | - | - | TA1 | ||
| 529 | Data Communication Link Or Powertrain Control Module 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 | 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 | - | - | ||
| 552 | Secondary Air Injection Bypass Circuit Failure | KC9 | - | - | ||
| 553 | Secondary Air Injection Diverter Circuit Failure | KC9 | - | - | ||
| 556 | Fuel Pump Relay Primary Circuit Failure | J1 | - | - | ||
| 565 | Canister Purge Circuit Failure | KB1 | - | - | ||
| 566 | 3-4 Shift Solenoid Circuit Failure | TC1 | - | - | ||
| 569 | Auxiliary Canister Purge Circuit Failure | KD6 | - | - | ||
| 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 | 4X4 Low & Transmission Control Switch | TB3 | - | - | ||
| 624 | Electronic Pressure Control Circuit Failure | TC10 | - | TG90 | ||
| 625 | Electronic Pressure Control Driver Open In Powertrain Control Module | TC10 | - | TG90 | ||
| 626 | Coast Clutch Solenoid Circuit Failure | TC1 | - | - | ||
| 628 | Excessive Converter Clutch Slippage | - | - | TG90 | ||
| 629 | Torque Converter Clutch Solenoid Circuit Failure | TC1 | - | TG90 | ||
| 631 | Transmission Control Indicator Lamp Circuit Failure | TB3 | - | - | ||
| 632 | Transmission Control Switch Circuit Did Not Change States During KOER | - | TB 2 | NA 2 | ||
| 633 | 4X4 Low Switch Closed During KOEO | TB1 | - | - | ||
| 634 | Transmission Range Voltage Higher/Lower Than Expected | TD 1 | - | TG90 | ||
| 641 | Shift Solenoid 3 Circuit Failure | TC1 | - | - | ||
| 643 | Coast Clutch Solenoid Circuit Failure | TC20 | - | TC30 | ||
| 652 | Torque Converter Clutch Solenoid Circuit Failure | TC1 | - | - | ||
| 654 | Transmission Range Sensor Indicating Not In PARK During Self-Test | TD1 | - | - | ||
| 655 | Transmission Range Sensor Indicating Not In NEUTRAL During Self-Test | TD1 | - | - | ||
| 656 | Torque Converter Clutch Slippage | - | - | TG90 | ||
| 667 | Transmission Range Circuit Voltage Below Minimum Voltage | TD 1 | TD 1 | TG90 | ||
| 668 | Transmission Range Circuit Voltage Above Maximum Voltage | TD 1 | TD 1 | TG90 | ||
| 676 | Transmission Fault | (1) | (1) | (1) | ||
| 677 | Transmission Fault | (1) | (1) | (1) | ||
| 691 | 4X4 Low Switch Open Or Short Circuit | - | - | TB1 | ||
| 692 | Transmission State Does Not Match Calculated Ratio | (1) | (1) | (1) | ||
| 998 | Hard Fault Present - FMEM Mode | FMEM | - | - | ||
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