Ford Mustang (1999-2004) Service Manual: Diagnostic Trouble Code Charts

Diagnostic Trouble Code Chart

Five Digit DTC Component Description Condition Symptom Action
P0102 P0103 P1100 P1101 MAF MAF concerns MAF system has a malfunction which may cause a transmission concern. High or low EPC pressure, incorrect shift schedule.

Incorrect torque converter clutch engagement scheduling.

Symptoms similar to a throttle position (TP) failure.

REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P0112 IAT IAT indicates 125C (257F) (grounded) Voltage drop across IAT exceeds scale set for temperature 125C (257F). Incorrect EPC pressure, either high or low, results in harsh or soft shifts. REFER to thePowertrain Control/Emissions Diagnosis (PC/ED) manual.
P0113 IAT IAT indicates - 40C (-40F) (open circuit) Voltage drop across IAT exceeds scale set for temperature - 40C (-40F). Incorrect EPC pressure, either high or low, results in harsh or soft shifts. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P0114 IAT IAT out of onboard diagnostic range IAT temperature higher or lower than expected during KOEO and KOER. Rerun on-board diagnostic at normal operating temperature. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P0117 ECT ECT indicates 125C (257F) Voltage drop across ECT exceeds scale set for temperature 125C (257F) (grounded). Torque converter clutch will always be off, resulting in reduced fuel economy. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P0118 ECT ECT indicates -40C (-40F) Voltage drop across ECT exceeds scale set for temperature - 40C (-40F) (open circuit). Torque converter clutch will always be off, resulting in reduced fuel economy. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual
P0122 P0123 P1120 TP TP concern PCM has detected an error that may cause a transmission concern. Harsh engagements, firm shift feel, abnormal shift schedule, torque converter clutch does not engage, torque converter clutch cycling. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P0300-

P0308 P0320 P0340 P1351- P1364

Electronic

Ignition (EI)

EI systems concerns EI system has a malfunction which may cause a transmission concern. Harsh engagements and shifts, late WOT shifts, no torque converter clutch engagement. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P0503 P0500 P1500 P1502 VSS Insufficient VSS input PCM detected a loss of vehicle speed signal during operation. Possible loss of speedometer or speedometer fluctuation. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P1702 Digital TR Intermittent DTC codes P0705 or P0708 Refer to DTC codes P0705 or P0708 condition. Refer to DTC codes P0705 or P0708 symptom. Go To Pinpoint Test C .
P1704 Digital TR Digital TR circuit reading in between gear position during KOEO/KOER Digital TR sensor or shift cable incorrectly adjusted; or digital TR circuit failure. Wrong commanded EPC pressure.

Digital TR reading the wrong gear position.

Go To Pinpoint Test C .
P0705 Digital TR sensor Digital TR circuit failure Digital TR 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.

This DTC cannot be set by an incorrectly adjusted digital TR sensor.

Increase in EPC pressure (harsh shifts). Defaults to (D) or D for all gear positions. In (D) position trans stuck in D or manual 2. Go To Pinpoint Test C .
P0707 Digital TR sensor, wiring, PCM Digital TR sensor circuit below minimum voltage Digital TR sensor, circuit or PCM shorted or grounded. Increase in EPC pressure. Go To Pinpoint Test C .
P0708 Digital TR Digital TR sensor circuit TR3A open Digital TR sensor circuit TR3A reading 2.6v - 5.0v (open circuit). This DTC cannot be set by an incorrectly adjusted digital TR sensor. Increase in EPC pressure. Defaults to (D)or D for all gear ranges. Go To Pinpoint Test C .
P1705 Digital TR sensor Digital TR self test was not carried out in PARK or NEUTRAL Vehicle not in PARK or NEUTRAL during on-board diagnostic. Rerun on-board diagnostic in PARK or NEUTRAL. Go To Pinpoint Test C .
P0712 TFT, wiring, PCM 157C (315F) indicated TFT sensor circuit grounded Voltage drop across TFT sensor exceeds scale set for temperature of 157C (315F). Firm shift feel. Go To Pinpoint Test B .
P0713 TFT, wiring, PCM -40C (-40F) indicated TFT sensor circuit open Voltage drop across TFT sensor exceeds scale set for temperature - 40C (-40F). Firm shift feel. Go To Pinpoint Test B .
P1710 TFT TFT sensor in range malfunction PCM detected TFT not changing. Firm shift, TCIL flashing, increase in EPC. Go To Pinpoint Test B .
P1711 TFT TFT out of onboard diagnostic range Transmission not at operating temperature during on-board diagnostic. Warm vehicle to normal operating temperature. Go To Pinpoint Test B .
P1713 TFT wiring PCM TFT continually reading cold TFT sensor in range low failure Firm shift feel.

Substitute ECT for TFT

Go To Pinpoint Test B .
P1718 TFT wiring PCM TFT continually reading hot TFT sensor in range high failure Firm shift feel.

Substitute ECT for TFT

Go To Pinpoint Test B .
P1783 TFT Transmission over temperature condition indicated Transmission fluid temperature exceeded 127C (270F). Increase in EPC pressure. Go To Pinpoint Test B .
P0720 OSS Insufficient input from output shaft speed sensor PCM detected a loss of OSS signal during operation. Harsh shifts, abnormal shift schedule, no torque converter clutch activation. Go To Pinpoint Test E .
P0721 OSS OSS sensor signal noisy PCM has detected an erratic OSS signal. Harsh shifts, abnormal shift schedule, no torque converter clutch engagement Go To Pinpoint Test E .
P0722 OSS wiring Insufficient input from OSS PCM has detected a loss of OSS signal. Harsh shifts, abnormal shift schedule, no torque converter clutch engagement. Go To Pinpoint Test E .
P0741 ** TCC, internal components TCC slippage detected The PCM picked up an excessive amount of slippage during normal vehicle operation. TCC slippage/erratic or no torque converter clutch operation.

Flashing Transmission Control Indicator Lamp (TCIL).

GO to Diagnosis By Symptom .
P0743 * TCC, wiring, PCM TCC solenoid circuit failure during onboard diagnostic TCC solenoid circuit fails to provide voltage drop across solenoid. Circuit open or shorted or PCM driver failure during on-board diagnostic. Short circuit: engine stalls in second (OD, 2 range) at low idle speeds with brake applied.

Open circuit: torque converter clutch never engages.

Go To Pinpoint Test A .
P1746 * EPC, wiring, PCM Shorted PCM output driver Voltage through EPC solenoid is checked. An error will be noted if tolerance is exceeded. Open circuit causes maximum EPC pressure, harsh engagements and shifts. Go To Pinpoint Test D .
P1747 * EPC, wiring, PCM EPC solenoid circuit failure, shorted circuit or output driver Voltage through EPC solenoid is checked. An error will be noted if tolerance is exceeded. Short circuit causes minimum EPC pressure (minimum capacity) and limits engine torque (alternate firm). Go To Pinpoint Test D .
P1760 EPC, wiring, PCM EPC solenoid circuit failure, shorted circuit or output driver PCM detected a loss of EPC during operation. Unexpected reduction in engine torque. Go To Pinpoint Test D .
P0750 a SSA, wiring, PCM 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. Incorrect gear selection depending on condition mode and manual lever position. See Solenoid On/Off Chart. Go To Pinpoint Test A .
P0753 SSA, wiring, PCM SSA electrical circuit failure SSA circuit fails to provide voltage drop across solenoid. Circuit open or shorted or PCM driver failure during on-board diagnostic. Incorrect gear depending on condition mode and manual lever position. See Solenoid Off/On Chart. Flashing Transmission Control Indicator Lamp (TCIL). Go To Pinpoint Test A .
P0751 SSA, wiring, PCM Shift solenoid A functional failure Mechanical or hydraulic failure of the shift solenoid. Incorrect gear selection depending on failure mode manual lever position. REFER to Solenoid Operation Chart.

Go To Pinpoint Test A .

P0781 b SSA or internal parts 1-2 shift error Engine rpm drop not detected when 1-2 shift was commanded by PCM. Incorrect gear selection depending on failure or mode and manual lever position. Shift errors may also be due to other internal transmission concerns (stuck valves, damaged friction material). REFER to Solenoid Operation Chart.

Go To Pinpoint Test A .

P1714 SSA, internal components SSA malfunction Mechanical failure of the solenoid detected. Incorrect gear selection depending on condition, mode and manual lever position. See Solenoid Operation Chart. Go To Pinpoint Test F .
P0755 a SSB, wiring, PCM SSB solenoid circuit failure SSB circuit fails to provide voltage drop across solenoid. Circuit open or shorted or PCM driver failure during on-board diagnostic. Incorrect gear selection depending on condition mode and manual lever position. See Solenoid On/Off Chart. Go To Pinpoint Test A .
P0756 SSB Shift solenoid B functional failure Mechanical or hydraulic failure of the shift solenoid. Incorrect gear selection depending on failure mode and manual lever position. REFER to Solenoid Operation Chart.

Go To Pinpoint Test A .

P1715 SSB SSB malfunction Mechanical failure of the solenoid detected. Incorrect gear selection depending on condition, mode and manual lever position. See Solenoid Operation Chart. Go To Pinpoint Test F .
P0758 SSB, wiring, PCM SSB electrical circuit failure SSB circuit fails to provide voltage drop across solenoid. Circuit open or shorted or PCM driver failure during on-board diagnostic. Incorrect gear depending on condition mode and manual lever position. See Solenoid Off/On Chart. Flashing Transmission Control Indicator Lamp (TCIL). Go To Pinpoint Test A .
P0782 b SSA, SSB or internal parts 2-3 shift error Engine rpm drop not detected when 2-3 shift was commanded by PCM. Incorrect gear selection depending on failure or mode and manual lever position. Shift errors may also be due to other internal transmission concerns (stuck valves, damaged friction material). REFER to Solenoid Operation Chart.

Go To Pinpoint Test A .

P0783 b SSA, SSB or internal parts 3-4 shift error Engine rpm drop not detected when 3-4 shift was commanded by PCM Incorrect gear selection depending on failure or mode and manual lever position. Shift errors may also be due to other internal transmission concerns (stuck valves, damaged friction material) REFER to Solenoid Operation Chart.

Go To Pinpoint Test A .

P1116 ECT ECT out of onboard diagnostic range ECT temperature higher or lower than expected during KOEO and KOER. Rerun on-board diagnostic at normal operating temperature. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P1124 TP TP voltage high/low for on-board diagnostic TP was not in the correct position for on-board diagnostic. Rerun at appropriate throttle position per application. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P1460 A/C A/C clutch cycling pressure switch error A/C or defrost on condition may result from A/C clutch being on during on-board diagnostic. DTC set during onboard diagnostic, repeat with A/C off.

Failed on, EPC pressure slightly low with A/C OFF.

REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P1636 PCM PCM PCM detected internal error - - REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P1703 BPP BPP switch circuit failed. Brake ON/OFF circuit failure. Failed ON or not connected - torque converter clutch will not engage at less than 1/3 throttle. Failed OFF or not connected - torque converter clutch will not disengage when brake is applied. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P1703 BPP Brake not actuated during onboard diagnostic Brake not cycled during KOER. Failed OFF or not connected - torque converter clutch will not engage at less than 1/3 throttle. Failed OFF or not connected - torque converter clutch will not disengage when brake is applied. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P0740 TCC, wiring, PCM 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 second (OD, 2 range) at low idle speeds with brake applied.

Open circuit: torque converter clutch never engages.

Flashing Transmission Control Indicator Lamp (TCIL).

Go To Pinpoint Test A .
P0740 TCC TCC malfunction Mechanical failure of the solenoid detected. Failed ON - Engine stalls in 2nd (O/D, Manual 2 ranges) at low idle speeds with brake applied. Failed OFF - Torque Converter never applies. Go To Pinpoint Test F .
P1741 b TCC, internal components Excessive torque converter clutch engagement error Excessive variations in slip (engine speed surge) across the torque converter clutch. Engine rpm oscillation is present in 3rd gear. Go To Pinpoint Test A .
P1742 TCC, internal components TCC solenoid failed ON TCC solenoid has failed on by electric, mechanical or hydraulic concern. Harsh shifts. Go To Pinpoint Test A .
P1743 TCC, internal components TCC solenoid failed ON TCC solenoid has failed on by electric, mechanical or hydraulic concern. Harsh shifts. Go To Pinpoint Test A .
P1744 TCC TCC The PCM picked up an excessive amount of TCC slippage during normal vehicle operation. TCC slippage/erratic or no torque converter clutch operation. GO to Diagnosis by Symptom.
P1767 TCC 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 second (O/D, 2 range) at low idle speeds with brake applied.

Open circuit: Torque Converter never engages.

Go To Pinpoint Test A .
P1780 TCS TCS not changing states TCS not cycled during self-test.

TCS circuit open or shorted.

Rerun on-board diagnostic and cycle switch. No OD cancel when switch is cycled. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
- TCIL TCIL circuit failure TCIL circuit open or shorted. Failed on, OD cancel mode on. No flashing TCIL for EPC failure or sensor. Failed off, OD cancel mode never indicated. No flashing TCIL for EPC sensor failure. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual
P1709 PNP switch PNP switch out of self-test range Vehicle not in PARK or NEUTRAL during on-board diagnostic. Rerun on-board diagnostic in PARK or NEUTRAL. Go To Pinpoint Test C .

a - Output circuit check, generated only by electrical symptoms.

b - May also be generated by some other non-electric transmission hardware system.

Rotunda Transmission Tester

The Transmission Tester is used to diagnosis the digital transmission range sensor and is used in conjunction with the pinpoint tests. The tests should be carried out in order. Installing the Transmission Tester allows separation of the vehicle electronics from transmission electronics; refer to the Transmission Tester manual for these tests.

  • Digital Transmission Range (TR) Sensor Testing
  • Resistance/Continuity Test
  • Voltage Test - PARK/NEUTRAL, Reversing Lamp, and Optional Circuits
    Transmission Drive Cycle Test
    NOTE: Always drive the vehicle in a safe manner according to driving conditions and obey all traffic laws. NOTE: The Transmission Drive Cycle Test must be followed exactly. Malfunctions must occur ...

    Transmission Connector Layouts
    Transmission Vehicle Harness Connector   Transmission Internal Harness Connector   Digital Transmission Range (TR) Sensor Connector   Output Shaft Speed (OSS) Sensor Harnes ...

    Other materials:

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    Engine (Assembly)
    Special Tool(s) Guides, Connecting Rod 303-442 (T93P-6136-A) Installer, Crankshaft Vibration Damper 303-102 (T74P-6316-B) Installer, Front Cover Oil Seal 303-335 (T88T-6701-A) Installer, Crankshaft Rear ...

    Speed Control
    Torque Specifications Speed Control The speed control system consists of the following components: speed control actuator cable (9A825) deactivator switch output shaft sensor (OSS) speed control actuator switches (9C888) brake pedal position (BPP) switc ...