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.
1996 Mercury Villager LSFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code (DTC) Reference Chart
DIAGNOSTIC TROUBLE CODE (DTC) REFERENCE CHART
| MIL DTC | Description | Circuit Test | ||||
|---|---|---|---|---|---|---|
| P0000 | No Faults Detected | -- | ||||
| P0100 | MAF Sensor Circuit Fault | DC | ||||
| 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 | HO2S Circuit Fault; Bank 1, Sensor 1 | H | ||||
| P0135 | HO2S Heater Fault; Bank 1, Sensor 1 | H | ||||
| P0136 | HO2S Circuit Fault; Bank 1, Sensor 2 | H | ||||
| P0141 | HO2S Heater Fault; Bank 1, Sensor 2 | H | ||||
| P0171 | Fuel Mixture Too Lean | H | ||||
| P0172 | Fuel Mixture Too Rich | H | ||||
| P0300 | Random Or Multiple Misfire | 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 | DR | ||||
| P0340 | CMP Sensor Circuit Fault | DR | ||||
| P0400 | EGR Flow Fault | HE | ||||
| P0402 | Excessive EGR Flow Detected | HE | ||||
| P0420 | Catalyst Efficiency Fault; Bank 1 | HF | ||||
| P0500 | Vehicle Speed Sensor Fault | DP | ||||
| P0505 | Idle Control System Fault | KE | ||||
| P0600 | Serial Communication Link Fault | QA | ||||
| P0605 | PCM Internal Failure | (2) | ||||
| P0705 | Transmission Range Sensor Fault | TD | ||||
| P0710 | Transmission Temp Sensor Fault | TE | ||||
| P0720 | Output Speed Sensor Circuit Fault | DR | ||||
| P0725 | Engine Speed Input Circuit Fault | ND | ||||
| P0731 | 1st Gear - Incorrect Ratio | TC | ||||
| P0732 | 2nd Gear - Incorrect Ratio | TC | ||||
| P0733 | 3rd Gear - Incorrect Ratio | TC | ||||
| P0734 | 4th Gear - Incorrect Ratio | TC | ||||
| P0740 | Torque Converter Clutch Fault | TC | ||||
| P0745 | Pressure Control Solenoid Fault | TC | ||||
| P0750 | Shift Solenoid No. 1 Circuit Fault | TC | ||||
| P0755 | Shift Solenoid No. 2 Circuit Fault | TC | ||||
| P1400 | EGR DPFE Sensor; Voltage Low | HE | ||||
| P1401 | EGR Temperature Sensor Fault | HE | ||||
| P1605 | A/T Data Communication Line Fault | QA | ||||
| P1701 | Fuel Trim Fault | H | ||||
| P1705 | Throttle Position Sensor Fault (A/T) | DH | ||||
| P1760 | Overrun Clutch S/V | TC | ||||
| P1900 | Cooling Fan Fault | KF | ||||
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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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