P0726 OBD-II Trouble Code: Engine Speed Input Circuit Range/Performance

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0726 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0726 code

P0726 is a diagnostic trouble code (DTC) for "Engine Speed Input Circuit Range/Performance". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0726 DIAGNOSTIC Get a fair and transparent estimate upfront

check engine light

P0726 code definition

The P0726 code means that the car’s computer has received an incorrect, irrational or erratic engine speed signal from the engine speed input circuit. Because of this, the transmission will not be able to shift correctly.

What the P0726 code means

The P0726 code is related to other similar codes dealing with the crankshaft position sensor and engine speed input circuit. Essentially, the car’s computer is receiving an incorrect signal from the engine speed input circuit. This signal might be erratic, outright incorrect, or irrational. The upshot is that the transmission cannot provide a shifting strategy because the computer is unable to determine the actual speed of the engine. The computer expects the engine speed to increase gradually, and if that does not happen, whether actual or due to a faulty signal, the P0726 code will be stored.

What causes the P0726 code?

There are multiple potential causes for the P0726 code. These can include:

  • A failed engine input speed sensor
  • A failed transmission output speed sensor
  • A short or open in the wiring harness to one of the sensors
  • A loose connection to one of the sensors
  • A faulty crankshaft position sensor
  • A faulty shift solenoid
  • Dirty, contaminated or low transmission fluid
  • Faulty PCM (rare)

What are the symptoms of the P0726 code?

A range of different symptoms could be present with the P0726 code. These can include the following:

How does a mechanic diagnose the P0726 code?

First, the mechanic should read the codes stored in the computer using an OBD II scanner. Often, the P0726 code is stored with other codes relating to the problem, which can help move the diagnosis along. After checking the code, it should be cleared and the vehicle test driven to see if the code will reset, and to test for operating problems.

Next, the mechanic should inspect the wiring and connector leading to the engine speed input sensor and the sensor’s circuit. Damaged wires should be replaced or repaired and any corrosion should be cleaned. Loose connections should be repaired, and then the vehicle should be tested again.

If a test drive results in recoding, the mechanic should check for reference voltage at the input speed sensor. Continuity and resistance should be checked in both circuits. If the sensor fails these tests, it should be replaced.

Common mistakes when diagnosing the P0726 code

The most common mistake here is assuming that the problem is the vehicle speed sensor and replacing it without further diagnosis. Other incorrect assumptions (made without a full diagnosis) include a problem with the fuel delivery system, a transmission failure or driveline problem.

How serious is the P0726 code?

The P0726 code is serious, and should be diagnosed immediately. It can result in serious drivability problems, up to and including the engine stalling while slowing to a stop in traffic. This can lead to accidents that could have been avoided. There is also the potential for damage to the transmission if it fails to shift correctly, or at all.

What repairs can fix the P0726 code?

The most common repair is the replacement of the engine speed input sensor, although corrosion and damage to connectors, wires and wiring harnesses are also common repairs needed. Replacing a defective transmission output speed sensor is also a common repair.

Additional comments for consideration regarding the P0726 code

Note that the Check Engine Light will not come on in all instances.

Need help with a P0726 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
Check Engine Light
P0726

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0726 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,815

Rating Summary
3,485
164
43
24
99
3,485
164
43
24
99

Addison

16 years of experience
7 reviews
Addison
16 years of experience
Addison is well mannered, prompt and communicative. He was able to correctly diagnose my automotive problem in a reasonable amount of time and I'd be happy to have him return and do the repairs.
2004 FORD FREESTAR - CHECK ENGINE LIGHT IS ON - SACRAMENTO, CALIFORNIA

Ben

38 years of experience
912 reviews
Ben
38 years of experience
Mr. Smith was amazing! He was on time, knowledge, and quick! He is my new go to!
2014 FIAT 500L - CHECK ENGINE LIGHT IS ON - HOUSTON, TEXAS

John

17 years of experience
310 reviews
John
17 years of experience
He was prompt, professional and knowledgeable. I would highly recommend him.
2004 HONDA CIVIC - CHECK ENGINE LIGHT IS ON - ORLANDO, FLORIDA

John

17 years of experience
310 reviews
John
17 years of experience
Very nice guy, on time and helpful.
2005 VOLKSWAGEN TOUAREG - CHECK ENGINE LIGHT IS ON - ORLANDO, FLORIDA

More related articles

P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....

Related questions

Q: Q: Code p0128

Your vehicle does not have a coolant sensor and uses the cylinder head temperature sensor to do both jobs. The system uses this sensor to sense both the coolant and head temperature. If your vehicle fan is running all the...

Q: Can p0717 trigger p0700 on 2006 Equinox?

Both the codes P0700 and P0717 are to the transmission input shaft speed sensor and most likely are related codes. You should have transmission input speed sensor replaced and codes cleared and then see if any codes or problems return....

Q: I have a Nissan Quest with several codes showing - P0075, P0882, P0726

Ok the codes you have given me look like they all may point to different problems. The P0075 points to a malfunction in the intake valve control circuit. The valve timing solenoid may be failing in this case. These valves...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com