OBD-II · P0715
P0715 Code: Transmission Input Speed Sensor Fault
Input/turbine speed sensor circuit malfunction
The short version
Not recommended — this code can cause erratic shifting or sudden limp mode engagement, which is risky at highway speeds.
- Severity: Serious
- Most common cause: Damaged input speed sensor wiring/connector
- 5 diagnosis steps in order
- 4 symptoms tied to this code
Darker bars are the more common causes; bar length is the top expected repair cost. Start with the dark, cheap causes before the expensive ones.
Can I keep driving?
Not recommended — this code can cause erratic shifting or sudden limp mode engagement, which is risky at highway speeds. Get it checked promptly.
Symptoms
- Delayed, harsh, or erratic gear shifts
- Transmission entering limp/fail-safe mode
- Speedometer inaccuracy in some cases
- Jerking or shuddering during gear changes
Causes & repair cost
Damaged input speed sensor wiring/connector
Most common$80 – $250
Failed input speed sensor
Most common$150 – $450
Low or dirty transmission fluid
Possible$100 – $300
Internal transmission wear (tone ring, gear teeth)
Rare$800 – $3,000
If it's just the sensor or wiring, cost stays moderate; if the fault is internal to the transmission the cost jumps significantly, so early diagnosis helps avoid further internal damage.
Estimate the repair for your carDiagnosis steps in order
- Check transmission fluid level and condition first
- Visually inspect sensor wiring and connectors
- Test sensor resistance with a multimeter against spec
- Monitor sensor signal live with a scan tool while driving
- Inspect the internal tone ring if the sensor itself tests fine
FAQ
Can I drive with a P0715 code?
It's best to avoid long drives since it can trigger sudden limp mode.
Can a transmission fluid change fix this?
Sometimes, if fluid was low or degraded — worth trying first as a cheap step.
What does limp mode mean?
A protective mode that limits speed/gears to protect the transmission from further damage.
Is this code always expensive to fix?
No, if it's just a sensor or wiring issue the cost is relatively moderate.
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