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.
2001 Mercury Villager BaseFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Definition Charts
SCAN TOOL CODE DIRECTORY
| DTC | Description | Go To Test | ||||||
|---|---|---|---|---|---|---|---|---|
| P0000 | No Faults Detected | N/A | ||||||
| P0100 | MAF Sensor Circuit Fault | DC | ||||||
| P0105 | MAP/BARO Sensor Fault | DB | ||||||
| P0110 | IAT Sensor Circuit Fault | DA | ||||||
| P0115 | ECT Sensor Circuit Fault | DA | ||||||
| P0120 | Throttle Position Sensor Fault | DH | ||||||
| P0125 | Engine Temp Low, No Closed Loop | DA | ||||||
| P0130 | HO2S1, Bank 1 - Circuit Malfunction | H | ||||||
| P0131 | HO2S1, Bank 1 - Lean | H | ||||||
| P0132 | HO2S1, Bank 1 - Rich | H | ||||||
| P0133 | HO2S1, Bank 1 - Slow Response | H | ||||||
| P0134 | HO2S1, Bank 1 - No Activity Detected | H | ||||||
| P0135 | HO2S1, Bank 1 - Heater Circuit Malfunction | H | ||||||
| P0137 | HO2S1, Bank 2 - Lean | H | ||||||
| P0138 | HO2S1, Bank 2 - Rich | H | ||||||
| P0139 | HO2S1, Bank 2 - Slow Response | H | ||||||
| P0140 | HO2S1, Bank 2 - No Activity Detected | H | ||||||
| P0141 | HO2S1, Bank 2 - Heater Circuit Malfunction | H | ||||||
| P0171 | Fuel Mixture Too Lean - Bank 1 | H | ||||||
| P0172 | Fuel Mixture Too Rich - Bank 1 | H | ||||||
| P0180 | Fuel Temperature Sensor Circuit | HX | ||||||
| P0300 | Random Or Multiple Misfire Detected | HD | ||||||
| P0301 | Cylinder No. 1 Misfire Detected | HD | ||||||
| P0302 | Cylinder No. 2 Misfire Detected | HD | ||||||
| P0303 | Cylinder No. 3 Misfire Detected | HD | ||||||
| P0304 | Cylinder No. 4 Misfire Detected | HD | ||||||
| P0305 | Cylinder No. 5 Misfire Detected | HD | ||||||
| P0306 | Cylinder No. 6 Misfire Detected | HD | ||||||
| P0325 (1) | Knock Sensor Circuit Fault | DG | ||||||
| P0335 | CKP Sensor Circuit Fault | DS | ||||||
| P0340 | CMP Sensor Circuit Fault | DR | ||||||
| P0420 | Catalyst Efficiency Fault; Bank 1 | HF | ||||||
| P0440 | EVAP Emission Control System Leak Detected | HX | ||||||
| P0443 | EVAP Emission Control System Purge Volume Control Valve | HX | ||||||
| P0446 | EVAP Emission Control System Vent Control Circuit | HX | ||||||
| P0450 | EVAP Emission Control System Pressure Sensor Malfunction | HX | ||||||
| P0455 | EVAP Emission Control System Leak Detected (Gross Leak/No Flow) | HX | ||||||
| P0500 | Vehicle Speed Sensor Malfunction | DP | ||||||
| P0505 | Idle Control System Fault | KE | ||||||
| P0510 | Closed TP Sensor Malfunction | HB | ||||||
| P0600 | Serial Communication Link Fault | QA | ||||||
| P0605 | PCM Read Only Memory Error | (2) | ||||||
| P0705 | Transmission Range Sensor Fault | (3) | ||||||
| P0710 | Transmission Temp Sensor Fault | (3) | ||||||
| P0720 | Output Speed Sensor Circuit Fault | (3) | ||||||
| P0725 | Engine Speed Input Circuit Fault | ND | ||||||
| P0731 | 1st Gear - Incorrect Ratio | (3) | ||||||
| P0732 | 2nd Gear - Incorrect Ratio | (3) | ||||||
| P0733 | 3rd Gear - Incorrect Ratio | (3) | ||||||
| P0734 | 4th Gear - Incorrect Ratio | (3) | ||||||
| P0740 | Torque Converter Clutch Fault | (3) | ||||||
| P0744 | Torque Converter Clutch Solenoid Malfunction | (3) | ||||||
| P0745 | Pressure Control Solenoid Fault | (3) | ||||||
| P0750 | Shift Solenoid "A" Circuit Fault | (3) | ||||||
| P0755 | Shift Solenoid "B" Circuit Fault | (3) | ||||||
| P1105 | MAP/BARO Solenoid Circuit Malfunction | DB | ||||||
| P1148 | Closed Loop Control Malfunction | H | ||||||
| P1217 | Engine Over Temperature | DA | ||||||
| P1320 | Distributor Signal Interrupt | JA | ||||||
| P1336 | Crankshaft Position Sensor | DS | ||||||
| P1440 | EVAP Emission Control System Small Leak Detected | HX | ||||||
| P1444 | EVAP Emission Control System Canister Purge Valve | HX | ||||||
| P1446 | EVAP Emission Control System Vent Control (Closed) | HX | ||||||
| P1447 | EVAP Emission Purge Flow Monitoring | HX | ||||||
| P1448 | EVAP Emission Control System Vent Control (Open) | HX | ||||||
| P1490 | EVAP Emission Vacuum Cut By-Pass Solenoid Circuit | HX | ||||||
| P1491 | EVAP Emission Vacuum Cut By-Pass Solenoid Malfunction | HX | ||||||
| P1605 | A/T Data Communication Line Fault | QA | ||||||
| P1705 | Throttle Position Sensor Fault (A/T) | (3) | ||||||
| P1706 | Park/Neutral Position Switch Not Switching | (3) | ||||||
| P1760 | Overrun Clutch S/V | (3) | ||||||
|
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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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