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:
Flywheel Ring Gear
Removal
1. Remove the flywheel.
2. WARNING: This procedure should be carried out only by a
correctly equipped and
experienced acetylene torch operator. Tongs must be used or asbestos gloves
worn
when handling the heated flywheel ring gear. Failure to f ...
Installation
Convertible
1. For installation of the back window glass, refer to Section.
Coupe
CAUTION: After installing the urethane installed back window
glass, the vehicle should
not be driven until the urethane adhesive has cured. The curing time at
tempe ...
Horn (Diagnosis and Testing)
Refer to Wiring Diagrams Cell 44 , Horns/Cigar Lighter for schematic
and connector information.
Special Tool(s)
73 Digital Multimeter or
equivalent
105-R0051
Inspection and Verification
1. Verify the customer concern by operating the h ...
