Code P0722 output speed sensor location needed

Tiny
ILLDIN
  • MEMBER
  • 2013 CHEVROLET SPARK
  • 1.2L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 149,000 MILES
Hey, my car will go into limp mode occasionally, and the code that causes it is P0722 which points to the output speed sensor. However, I cannot seem to find anywhere online information on how to access this sensor. I've seen some vehicles replace this part by accessing the the sensor under the hood, but some vehicles have it under the car inside of the transmission. Where is the location of the sensor on this vehicle, and how do I access it? Any info helps thanks!
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Tuesday, September 1st, 2020 AT 2:08 PM

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Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

The sensor is right on top of the transmission. I attached a picture and the procedure for you.

Please let me know how it works out.

Roy

Description for you of the code.

DTC P0722, P077C, or P077D

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle See: Vehicle > Initial Inspection and Diagnostic Overview > Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Review Strategy Based Diagnosis See: Vehicle > Initial Inspection and Diagnostic Overview > Strategy Based Diagnosis for an overview of the diagnostic approach.

Diagnostic Procedure Instructions See: Vehicle > Initial Inspection and Diagnostic Overview > Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0722
Output Speed Sensor Circuit No Signal

DTC P077C
Output Speed Sensor Circuit Low Voltage

DTC P077D
Output Speed Sensor Circuit High Voltage

Circuit/System Description

The output speed sensor (OSS) is installed in the transmission case. The OSS detects the revolution speed of the counter drive gear (4) as the output shaft speed. These signals are transmitted to the TCM. Based on those signals, the TCM controls engine torque, shift timing, and lock-up.

Conditions for Running the DTC

P0722

DTC P0705, P0706, P0717, P07C0, P07BF, P0748, P0778, P0798, P0962, P0963, P0966, P0967, P0970, P0971, P0973, or P0974 is not set.

The output speed is 300 RPM or greater.

The transmission is not in limp home mode.

The transmission range is D, 2, or L.

P077C

Ignition ON.

Battery voltage is between 10.2-18.0 volts.

P077D

Ignition ON.

Battery voltage is between 10.2-18.0 volts.

Conditions for Setting the DTC

P0722

The TCM detects no pulse signal from output speed sensor when there are 13 pulses from the input speed sensor, 500 occurrences.

P077C

Voltage signal is less than 0.2 V for 100 msec over 10 times.

P077D

Voltage signal is greater than 2.7 V for 100 msec over 10 times.

Action Taken When the DTC Sets

P0722

DTC P0722 is a Type A DTC.

The TCM allows the vehicle after below 10 km/h (6 mph) to be operated only in the fourth gear.

P077C and P077D

DTCs P077C and P077D are Type A DTCs.

The TCM allows the vehicle after below 10 km/h (6 mph) to be operated only in the second gear.

Conditions for Clearing the DTC

DTCs P0722, P077C, and P077D are Type A DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics See: Automatic Transmission/Transaxle > Electrical > Automatic Transmission Controls Schematics

Connector End View Reference

Component Connector End Views See: Vehicle > Connector Views > Fuel Pump and Level Sensor Assembly

Electrical Information Reference

Circuit Testing See: Vehicle > Component Tests and General Diagnostics > Circuit Testing

Connector Repairs See: Vehicle > Component Tests and General Diagnostics > Connector Repairs

Testing for Intermittent Conditions and Poor Connections See: Vehicle > Component Tests and General Diagnostics > Testing for Intermittent Conditions and Poor Connections

Wiring Repairs See: Vehicle > Component Tests and General Diagnostics > Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions > Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Diagnostic Trouble Code (DTC) List - Vehicle See: A L L Diagnostic Trouble Codes ( DTC ) Diagnostic Trouble Code Descriptions > Diagnostic Trouble Code (DTC) List - Vehicle

Scan Tool Reference

Control Module References See: Vehicle > Programming and Relearning > Control Module References for scan information.

Circuit/System Verification

1. Operate the vehicle at 16-32 km/h (10-20 mph) while observing the scan tool Transmission OSS parameter. The Transmission OSS should vary with the vehicle speed and not drop out.

2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observe from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF, disconnect the output speed sensor wiring harness.

2. Ignition ON, Test for 9-12 volts between the high and low signal circuits, from TCM.

If not within the specified range, replace the K71 TCM.

3. If the circuits test normal, test or replace the B14A output speed sensor.

Component Testing

1. Test the output speed sensor wiring. There should not be an open, short to ground, or a short together condition.

If one of the above conditions is found, repair the circuit.

2. If all circuits test normal, replace the B14A output speed sensor.

Repair Instructions

Perform the Diagnostic Repair Verification See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Diagnostic Repair Verification after completing the diagnostic procedure.

Output Speed Sensor Replacement See: Transmission Speed Sensor, A/T > Removal and Replacement > Output Speed Sensor Replacement

Transmission Adaptive Learn See: Automatic Transmission/Transaxle > Symptom Related Diagnostic Procedures > Transmission Adaptive Learn

Control Module References See: Vehicle > Programming and Relearning > Control Module References for TCM replacement, setup, and programming
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Tuesday, September 1st, 2020 AT 3:20 PM

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