DTC code
P0722
Output Shaft Speed Sensor Circuit No Signal
Technical guide
Symptoms
- Check engine light / transmission warning (MIL or "Transmission Shift Error")
- improper
- harsh or delayed shifting or transmission failing to shift
- transmission slip
- drop in fuel economy
- speedometer malfunction possible
- stalling at idle or while driving
- engine misfiring reported in some cases.
Probable causes
- 1) Defective output speed sensor (internal coil damage, contamination or bearing wear stopping pulse generation). 2) Defective sensor connector or wiring: corrosion
- chafing or broken pins in the sensor-to-TCM harness interrupting the pulse signal. 3) Defective shift solenoids. 4) Defective transmission valve body. 5) PCM/TCM fault (rare).
Diagnostic steps
- Scan for codes and record freeze frame information, then test drive to duplicate the code-setting conditions, watching engine load, throttle position, RPM and road speed.
- Check the output speed sensor signal on live scan data while driving; a missing signal with the vehicle moving confirms the fault.
- Visually inspect the OSS sensor connector and harness for corrosion, chafing, broken pins or damaged wiring.
- Perform continuity checks on the sensor circuit wiring to the TCM/PCM.
- Verify sensor pulse output with an oscilloscope; replace the sensor if it produces no pulses.
- If the sensor and circuit test good, investigate shift solenoids and the valve body per the manufacturer's procedure.
- Clear codes and road test to confirm.
Cross-checked technical synthesis (QA). It does not replace the manufacturer's procedure.
Models most reported with this code (NHTSA)
Count of distinct owner complaints mentioning the code. US data — same engines, same failures.
AI here is a librarian: this page shows only what mechanics confirmed, or says “unknown”. It never suggests a diagnosis — MECCANIC interprets the code, never your car.
0 confirmed cases on P0722
Nothing confirmed yet for this code. No guess is offered on purpose.
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