P0715: How to Diagnose & Fix — Input/Turbine Speed Sensor Circuit Malfunction
21 vehicles · 14 makes · $150-$4,500 repair
How to diagnose and fix P0715: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Mazda Tribute · 2001–2008
Same CD4E automatic transmission as the Ford Escape, prone to premature failure. Internal clutch and servo bore wear. V6 models with CD4E are most affected.
Common Symptoms
- Harsh 1-2 shift
- Slipping in 3rd and 4th gear
- Shudder on acceleration
- Delayed engagement
- Burning trans fluid smell
How to Fix
Rebuild or replace transmission with remanufactured unit. Use updated servo bore kit during rebuild. Fluid changes every 30k miles help but do not prevent failure.
Owner tips & cautions
- TipThe 4-cylinder model uses a different (more reliable) transmission — CD4E problems are V6 specific
Sources for this issue (2)
Chrysler New Yorker · 1994–1996
The New Yorker's A604 (41TE) 4-speed automatic was one of the first electronically controlled transmissions and is notorious for premature failure. The solenoid pack, input/output speed sensors, and clutch packs wear out, causing erratic shifting and complete failure.
Common Symptoms
- Erratic shifting
- Stuck in second gear limp mode
- Delayed engagement into drive or reverse
- Slipping under load
- Check engine light
- Transmission shudder on acceleration
How to Fix
Replace the solenoid pack and speed sensors for early symptoms. Once slipping occurs, a full rebuild or remanufactured transmission is required. Use only ATF+4 fluid — other fluids accelerate clutch wear.
Sources for this issue (1)
Chrysler LeBaron · 1990–1995
The LeBaron uses the Chrysler A604 (41TE) 4-speed electronically-controlled automatic transaxle. This was one of the first fully electronic automatics and its solenoid pack is the primary failure point. The solenoids develop internal leaks and electrical failures, causing erratic shifting, no-shift conditions, and limp mode (locked in 2nd gear). The transmission controller can also fail. The A604 was so problematic that Chrysler extended warranty coverage on early units.
Common Symptoms
- Transmission stuck in 2nd gear (limp mode)
- Check engine light with P0700 and P07XX codes
- Harsh or erratic shifting between all gears
- No upshift from 2nd gear
- Transmission bangs into gear from Park
How to Fix
Replace the solenoid pack assembly (located in the valve body) with an updated unit. The solenoid pack is accessible by removing the side pan. A remanufactured solenoid pack from TransGo or Rostra is $150-250. If the transmission is in limp mode, scan for codes first — many limp mode events are caused by a speed sensor or input/output shaft sensor failure rather than the solenoid pack.
What you need to diagnose it
The repair instructions explicitly call for reading stored codes. Use a scanner that can read the named code families before choosing a repair.The recommended scanner supports these code families; confirm your exact year, model and module coverage before buying.
ANCEL AD310 Classic OBD-II Scanner
Read & clear engine (P) codes
$20–$40View
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Reading and clearing the code is DIY work. Module replacement or reprogramming is not — most modules are VIN-programmed, so a new one does nothing until a shop codes it to your car. Check for an open recall or service bulletin before buying anything.
Sources for this issue (1)
Kia Optima · 2001–2002
Mercedes-Benz Sprinter · 2007–2018
Find P0715 by make
Browse every documented model and issue for your make.
P0715 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0715 mean?
P0715 stands for "Input/Turbine Speed Sensor Circuit Malfunction." P0715 indicates a malfunction in the input/turbine speed sensor circuit of an automatic transmission. This sensor measures how fast the transmission's input (turbine) shaft is rotating, which the transmission control module uses—alongside output speed—to calculate gear ratios and command smooth, properly timed shifts. When the signal is missing, erratic, or out of range, this code sets. Symptoms often include harsh or erratic shifting, incorrect shift points, no speedometer-related transmission data, or the transmission dropping into a limp/fail-safe mode.
What are the most common causes of P0715?
The most common causes of P0715 are: Faulty input/turbine speed sensor, Damaged wiring or connector at the sensor, Low or contaminated transmission fluid, Corroded or loose connector terminals, Open or short in the sensor circuit, Internal transmission wear or debris affecting the sensor, Faulty transmission control module (less common). The specific cause varies by vehicle.
How much does it cost to fix P0715?
Repair costs for P0715 range from $150 to $4,500, depending on the vehicle and root cause.
Which vehicles are affected by P0715?
Au7o has documented P0715 across 21 vehicle models from 14 manufacturers: Audi, Chrysler, Fiat, Ford, Honda, Hyundai, Jaguar, Jeep, Kia, Mazda, Mercedes-Benz, Nissan, Volkswagen, Volvo.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.