Diagnostic Trouble Code Definitions

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2002 Mercury Grand Marquis, 2002 Lincoln Town Car, 2002 Ford Crown Victoria, 2001 Mercury Mountaineer, and 2001 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For transmission DTCs, perform appropriate system test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS table. For engine-related DTCs output during QUICK TEST procedure, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. These DTCs pertain to engine performance and must be repaired first, as engine performance will greatly affect transmission operation.

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC ⁽¹⁾

Diagnostic Test

Description

Condition

Transmission Symptom

P0102 & P0103

⁽²⁾

MAF Sensor Malfunction

MAF System Has A Malfunction Which May Cause A Transaxle Concern

Incorrect Shift Schedule, High/Low EPC Pressure. Incorrect TCC Engagement Scheduling. Symptoms Similar To A TP Failure

P0112

⁽²⁾

IAT Indicates 254°F (125° C) - Short To Ground

Voltage Drop Across IAT Exceeds Scale Set For Temperature 125°C (254°F)

Incorrect EPC Pressure. Either High Or Low Which Will Result In Harsh Or Soft Shifts

P0113

⁽²⁾

IAT Indicates -40°F (-40°C) - Open Circuit

Voltage Drop Across IAT Exceeds Scale Set For Temperature -40°C (-40°F)

Incorrect EPC Pressure. Either High Or Low Which Will Result In Harsh Or Soft Shifts

P0114

⁽²⁾

IAT Out Of On-Board Diagnostic Range

IAT Temperature Higher Or Lower Than Expected During KOEO & KOER

Re-Run On-Board Diagnostics At Normal Operating Temperature

P0116

⁽²⁾

ECT Out Of On-Board Diagnostic Range

ECT Temperature Higher Or Lower Than Expected During KOEO & KOER

Re-Run On-Board Diagnostics At Normal Operating Temperature

P0117

⁽²⁾

ECT Indicates 254°F (125°C) - Short To Ground

Voltage Drop Across ECT Exceeds Scale Set For Temperature 125°C (254°F)

TCC Will Always Be Off Resulting In Poor Fuel Economy

P0118

⁽²⁾

ECT Indicates -40°F (-40°C) - Open Circuit

Voltage Drop Across ECT Exceeds Scale Set For Temperature 125°C (254°F)

TCC Will Always Be Off Resulting In Poor Fuel Economy

P0120, P0122 & P0123

⁽²⁾

TP Sensor Malfunction

PCM Has Detected An Error. This Error May Cause A Transaxle Concern

Harsh Shifts, Abnormal Shift Patterns, TCC Does Not Engage, TCC Cycling

P0300-P0308, P0320 & P0340

⁽²⁾

Electronic Ignition (EI) System Malfunction

EI System Has A Malfunction Which May Cause A Transaxle Concern

Harsh Engagements & Shifts, No TCC Engagement

P0500 & P0503

⁽²⁾

Insufficient VSS Input

PCM Detected A Loss Of VSS Signal

TCC Engages, Shift Hunting On Grades

P0705

Digital TR Sensor Circuit Short To Ground Or Open

Digital TR Sensor Circuits, Indicating An Invalid Pattern In TR_D. Condition Caused By A Short To Ground Or An Open In TR4, TR3A, TR2 and/or TR1 circuits, DTC P0705 Cannot Be Set By An Incorrectly Adjusted Digital TR Sensor

Increase in EPC Pressure (Harsh Shifts); Defaults To OD Or D For All Gear Positions; In OD Position, Transmission Is Stuck In D Or Manual 2nd

P0707

Digital TR Sensor Circuit Below Minimum Voltage

TR Sensor, Circuit Or PCM Shorted Or Grounded

Increase In EPC Pressure

P0708

Digital TR Sensor Circuit TR3A Open Circuit

Digital TR Sensor Circuit TR3A Reading 2.6- 5.0V (Open Circuit). This DTC Cannot Be Set By An Incorrectly Adjusted Digital TR Sensor

Increase In EPC Pressure, Defaults To OD Or D For All Gear Ranges

P0712

TFT Indicates 315°F (157°C) - Short To Ground

Voltage Drop Across TFT Sensor Exceeds Scale Set For Temperature Of 315°F (157°C)

TCC & Stabilized Shift Schedule May Be Enabled Sooner After Cold Start. Harsh Or Soft Shifts

P0713

TFT Indicates -40°F (-40°C) - Open Circuit

Voltage Drop Across TFT Sensor Exceeds Scale Set For Temperature Of -40°F (-40°C)

TCC & Stabilized Shift Schedule May Be Enabled Sooner After Cold Start. Harsh Or Soft Shifts

P0720

Insufficient Input From Output Shaft Speed Sensor

PCM Has Detected No OSS Signal

Abnormal Shift Schedule, No TCC Engagement

P0721

Noisy Signal From OSS Sensor

PCM Has Detected An Erratic OSS Signal

Abnormal Shift Schedule, No TCC Engagement

P0722

Intermittent Signal From OSS Sensor

PCM Has Detected An Erratic Or No OSS Signal

Abnormal Shift Schedule, No TCC Engagement

P0740

TCC Electrical Circuit Failure

TCC Circuit Fails To Provide Voltage Drop Across Solenoid. Circuit Open Or Shorted Or PCM Driver Failed During On-Board Diagnostic

Short Circuit: Engine Stalls In 2nd (OD, 2 Range) At Low Idle Speeds With Brake Applied. Open Circuit: Torque Converter Clutch Never Engages. Flashing TCIL

P0741 ⁽³⁾

A ⁽⁵⁾

The PCM Picked Up An Excessive Amount Of TCC Slippage During Normal Vehicle Operation

N/A

TCC Slippage/Erratic Or No Torque Converter Clutch Operation. Flashing TCIL

P0743 ⁽⁶⁾

TCC Solenoid Circuit Failure During On-Board Diagnostic

TCC Solenoid Circuit Fails To Provide Voltage Drop Across Solenoid, Circuit Open Or Shorted Or PCM Drive Failure During On-Board Diagnostic

If Short Circuit, Engine Stalls At Low Idle; If Open Circuit, TCC Does Not Engage

P0750 ⁽⁶⁾

SSA Solenoid Circuit Failure

SSA Circuit Failed To Provide Voltage Drop Across Solenoid. Circuit Open Or Shorted Or PCM Driver Failure During On-Board Diagnostic

⁽⁴⁾ Incorrect Gear Selection Depending On Condition Mode & Manual Lever Position

P0751

SSA Solenoid Functional Failure

Mechanical Or Hydraulic Failure Of The Shift Solenoid

⁽⁴⁾ Incorrect Gear Selection Depending On Failure Mode & Manual Lever Position

P0753

SSA Solenoid Circuit Failure

SSA Circuit Failed To Provide Voltage Drop Across Solenoid. Circuit Open Or Shorted Or PCM Driver Failure During On-Board Diagnostic

⁽⁴⁾ Incorrect Gear Selection Depending On Condition Mode & Manual Lever Position, Flashing TCIL

P0755 ⁽⁶⁾

SSB Solenoid Circuit Failure

SSB Circuit Failed To Provide Voltage Drop Across Solenoid. Circuit Open Or Shorted Or PCM Driver Failure During On-Board Diagnostic

⁽⁴⁾ Incorrect Gear Selection Depending On Condition Mode & Manual Lever Position

P0756

SSB Solenoid Functional Failure

Mechanical Or Hydraulic Failure Of The Shift Solenoid

⁽⁴⁾ Incorrect Gear Selection Depending On Failure Mode & Manual Lever Position

P0758

SSB Solenoid Circuit Failure

SSB Circuit Failed To Provide Voltage Drop Across Solenoid. Circuit Open Or Shorted Or PCM Driver Failure During On-Board Diagnostic

⁽⁴⁾ Incorrect Gear Selection Depending On Condition Mode & Manual Lever Position, Flashing TCIL

P0781 ⁽³⁾

1-2 Shift Error

Incorrect Gear Ratio While Commanding 1st Gear

⁽⁴⁾ Incorrect Gear Selection Depending On Condition Mode & Manual Lever Position. Shift Errors May Also Be Due To Other Internal Transaxle Concerns (e.g., Stuck Valves, Damaged Friction Material)

P0782 ⁽³⁾

2-3 Shift Error

Incorrect Gear Ratio While Commanding 2nd Gear

P0783 ⁽³⁾

3-4 Shift Error

Incorrect Gear Ratio While Commanding 3rd Gear

P1100 & P1101

⁽²⁾

MAF Sensor Malfunction

MAF System Has A Malfunction Which May Cause A Transaxle Concern

Incorrect Shift Schedule, High/Low EPC Pressure. Incorrect TCC Engagement Scheduling. Symptoms Similar To A TP Failure

P1120, P1121, P1124 & P1125

⁽²⁾

TP Sensor Malfunction

PCM Has Detected An Error. This Error May Cause A Transaxle Concern

Harsh Shifts, Abnormal Shift Patterns, TCC Does Not Engage, TCC Cycling

P1351-P1364

⁽²⁾

Electronic Ignition (EI) System Malfunction

EI System Has A Malfunction Which May Cause A Transaxle Concern

Harsh Engagements & Shifts, No TCC Engagement

P1460

⁽²⁾

ACC Switch Error

A/C or Defrost ON Condition May Result From A/C Clutch Being On During On-Board Diagnostic

Re-Run Diagnostics With A/C Off; If Stuck On, EPC Pressure Will Be Low

P1636

⁽²⁾

PCM Detected Internal Error

N/A

P1500 & P1502

⁽²⁾

Insufficient VSS Input

PCM Detected A Loss Of VSS Signal

TCC Engages, Shift Hunting On Grades

P1702

Digital TR Sensor Signal Intermittent

Refer To DTCs P0705 & P0708

P1703

⁽²⁾

BPP Switch Malfunction

Brake Not Cycled During KOER, Brake On/Off Circuit Failure

⁽⁷⁾

P1704

Digital TR Sensor Malfunction, Or Not In "P" Or "N" Position During KOEO/KOER

Digital TR Sensor Or Shift Cable Misadjusted Or Digital TR Circuit Failure

Incorrect Commanded PC Pressure, TR Sensor Reading Incorrect Gear Position

P1705 Or P1709

Digital TR Sensor Malfunction, Or Not In "P" Or "N" Position During KOEO/KOER

KOEO/KOER Not Run In PARK Or NEUTRAL

DTC Is Set, Re-Run On-Board Diagnostics With Manual Lever In "P" Or "N" Position

P1710

TFT Sensor In Range Malfunction

PCM Detected TFT Not Changing

Firm Shift, TCIL Flashing, Increase In EPC Pressure

P1711

TFT Sensor Not At Operating Temperature (25-240°F) During On-Board Diagnostics

Warm Or Cool Vehicle To Normal Operating Temperature

Vehicle Cold Or Overheated

P1713

TFT Continually Reading Cold

TFT Sensor In Range Low Failure

Firm shift feel. Substitute ECT for TFT

P1714

SSA Solenoid Failure

Mechanical Failure Of The Solenoid Detected

⁽⁴⁾ Incorrect Gear Selection Depending On Condition, Mode & Manual Lever Position

P1715

SSB Solenoid Failure

Mechanical Failure Of The Solenoid Detected

⁽⁴⁾ Incorrect Gear Selection Depending On Condition, Mode & Manual Lever Position

P1718

TFT Continually Reading Hot

TFT Sensor In Range High Failure

Firm Shift Feel. Substitute ECT For TFT

P1740

TCC Failure

Mechanical Failure Of The Solenoid Detected

No TCC Engagement

P1741

A ⁽⁴⁾

Excessive TCC Engagement Error

Excessive Variations In Slip (Engine Speed Surge) Across The Torque Converter Clutch

Engine RPM Oscillation Is Present In 3rd Gear

P1742

A ⁽⁴⁾

TCC Solenoid Failed ON

TCC Solenoid Has Failed On By Electric, Mechanical Or Hydraulic Concern

Harsh Shifts

P1743

A ⁽⁴⁾

TCC Solenoid Failed ON

TCC Solenoid Has Failed On By Electric, Mechanical Or Hydraulic Concern

Harsh Shifts

P1744

A ⁽⁴⁾

TCC

The PCM Picked Up An Excessive Amount Of TCC Slippage During Normal Vehicle Operation

TCC Slippage/Erratic Or No TCC Operation

P1746 ⁽⁶⁾

Open PCM Output Driver

Voltage Through EPC Solenoid Is Checked & Compared To A Voltage Through Solenoid After A Time Delay, Any Errors Are Recorded

Open Circuit - Causes Maximum EPC Pressure, Harsh Engagements & Shifts

P1747 ⁽⁶⁾

EPC Solenoid Circuit Failure, Shorted Circuit Or Output Driver

Voltage Through EPC Solenoid Is Checked & Compared To A Voltage Through Solenoid After A Time Delay, Any Errors Are Recorded

Short Circuit - Causes Failsafe EPC Pressure (Maximum Capacity), Harsh Engagements & Shifts

P1760

EPC Solenoid Circuit Failure, Shorted Circuit Or Output Driver

PCM Detected A Loss Of EPC During Operation

Unexpected Reduction In Engine Torque

P1767

A ⁽⁴⁾

TCC solenoid circuit failure during OBD Test

TCC Solenoid Circuit Fails To Provide Voltage Drop Across Solenoid. Circuit Open Or Shorted Or PCM Driver Failure During OBD Test

Short Circuit: Engine Stalls In 2nd (O/D, 2 Range) At Low Idle Speeds With Brake Applied. Open Circuit: TCC Never Engages

P1780

⁽²⁾

TCS Did Not Change States

TCS Not Cycled During Self-Test, TCS Circuit Open Or Shorted

TCS Not Cycled During KOER Self-Test, No OD Cancel When Switch Is Cycled

P1783

Transmission Overheating Condition, Fluid Temperature Exceeded - 260°F (127°C)

Increase In EPC Pressure During Overtemp. Only

Increase In EPC Pressure

⁽¹⁾	Only engine performance-related DTCs that may affect transmission operation are listed. For complete list of engine performance-related DTCs, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

⁽²⁾	See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

⁽³⁾	DTC can be set by other non-electronic-related transmission hardware condition.

⁽⁴⁾	Refer to illustrations to check solenoid on/off operation. See SOLENOID OPERATION CHART under DESCRIPTION & OPERATION.

⁽⁵⁾	Diagnose DTC by symptom. See appropriate SYMPTOM DIAGNOSIS under TROUBLE SHOOTING.

⁽⁶⁾	Output circuit check, generated ONLY by electrical conditions.

⁽⁷⁾	If stuck on or not connected, TCC will not engage at 1/3 or less throttle. If stuck off or not connected, TCC will not disengage when brake is applied.