P0722 — Output Speed Sensor Circuit No Signal #

The wording of this code may vary depending on the vehicle manufacturer.

• P0722 — Output Speed Sensor No Signal (Ford)
• P0722 — OSS Sensor Circuit No Signal (Chrysler)
• P0722 — Transmission Output Speed Sensor Circuit No Signal (Honda)
• P0722 — Output Shaft Speed Sensor Circuit No Signal (Hyundai/Kia)

Summary of code P0722 #

P0722 is a generic OBD-II trouble code indicating that the Transmission Output Speed Sensor (OSS) is not sending a signal to the vehicle’s Engine Control Module (ECM) or Transmission Control Module (TCM). The output speed sensor monitors the rotational speed of the transmission’s output shaft, providing critical data for transmission shift timing and speedometer accuracy. When the ECM/TCM detects no signal from this sensor, it triggers code P0722. This typically means either the sensor is faulty, the wiring is damaged, or there is a problem with the transmission control module itself. Addressing this fault quickly is important, as it can impact driveability and transmission performance.

Common Symptoms for code P0722 #

When code P0722 is present, a number of symptoms may manifest, often affecting both how the vehicle drives and what the driver perceives. The most prominent signs are related to transmission operation and dashboard warnings. Here are the typical indicators:

• Check Engine Light illuminated on the dashboard
• Transmission may stay in “limp” mode (locked in a single gear, often 2nd or 3rd)
• Harsh, delayed, or erratic shifting
• Speedometer not working or displaying zero
• Poor acceleration or reduced engine power
• Possible stalling when coming to a stop

Probable Causes for code P0722 (most to least frequent) #

The most common causes behind a P0722 are related to the output speed sensor and its electrical circuit. However, other factors can contribute. Here is a ranked list from most to least likely:

1. Faulty Output Speed Sensor (OSS): The sensor itself may have failed internally.
2. Damaged or corroded wiring/connectors: Open circuits, short circuits, or poor connections in the sensor harness.
3. Faulty Transmission Control Module (TCM) or Engine Control Module (ECM): Rare, but possible if the modules can’t read the sensor input.
4. Internal transmission issues: Such as a damaged tone ring or reluctor wheel on the output shaft.
5. Aftermarket modifications: Poorly installed electronics or transmission swaps can interfere with sensor operation.

Step-by-step diagnostics for code P0722 #

Diagnosing P0722 requires methodical electrical and physical inspection. Always start with the simplest checks before moving to complex ones. Here are the recommended steps:

• Use a scan tool to confirm P0722 and check for other related transmission codes.
• Visually inspect the output speed sensor and its wiring for obvious damage, corrosion, or loose connectors.
• With the ignition off, disconnect the OSS and check for bent, pushed-out, or corroded pins in the connector.
• Test the OSS using a multimeter (refer to OEM specs): check for proper resistance and continuity.
• Check for voltage supply and ground at the OSS connector with the ignition on.
• Inspect the wiring harness for continuity between the OSS and the TCM/ECM.
• If no faults are found, inspect the output shaft’s tone ring/reluctor wheel (often requires transmission disassembly).
• As a last resort, test or substitute a known-good TCM/ECM to rule out module failure.

Possible Repairs for code P0722 #

Once the root cause is identified, the following repairs may be necessary to resolve P0722:

• Replace the output speed sensor with a high-quality OEM or equivalent part.
• Repair or replace damaged wiring, connectors, or terminals in the OSS circuit.
• Clean corroded connections and apply dielectric grease to prevent future issues.
• Replace or repair the tone ring/reluctor wheel if physically damaged (requires transmission work).
• Reprogram, repair, or replace the TCM/ECM if diagnosed as defective.

Is it safe to drive with code P0722? #

Driving with code P0722 is generally not recommended. While it may be possible to operate the vehicle for short distances, the transmission often enters limp mode, which can severely limit speed and gear selection. This can be dangerous in traffic and may cause further transmission damage if ignored. If you must move the car, do so carefully and have it inspected as soon as possible.

Vehicles most commonly affected by code P0722 #

P0722 is a generic code found on many vehicles with automatic transmissions, but some models are more prone to this issue due to design and component placement. The following makes and models frequently experience this code:

• Ford (Focus, Fusion, F-150, Escape)
• Chrysler/Dodge/Jeep (Grand Caravan, Ram, Charger, Wrangler)
• Honda (Accord, Odyssey, Pilot)
• Hyundai/Kia (Sonata, Elantra, Sorento, Optima)
• Volkswagen (Jetta, Passat, Golf)

Common mistakes & best practices for code P0722 #

Misdiagnosis is common with transmission codes like P0722. Avoid unnecessary parts replacement by following best practices:

• Don’t replace the speed sensor without first checking wiring and connectors—many issues stem from corroded or broken wires.
• Always use the correct OEM part for sensor replacement; aftermarket sensors may not function properly.
• Clear the code after repairs and test drive to confirm a successful fix before returning the vehicle to service.
• Double-check the TCM/ECM grounds and power supplies before condemning the module.

FAQ express — code P0722 #

Here are quick answers to common questions about P0722:

• Can a bad output speed sensor cause transmission slipping?
  Not usually. P0722 causes shifting issues or limp mode, but slipping is typically due to worn clutches or bands inside the transmission.
• Is P0722 expensive to fix?
  Repair costs vary. Replacing the sensor itself is usually affordable, but if the wiring or internal transmission parts are damaged, costs can rise.