Engine Speed Input Circuit Range/Performance
The P0726 code means the vehicle's onboard diagnostic system has detected: Engine Speed Input Circuit Range/Performance. This is a critical severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $100 - $350 (parts and labor)
Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.
Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.
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Common Symptoms
- Check Engine Light illuminated
- Harsh or delayed shifting
- Engine RPM flare during shifts
- Transmission slipping sensation
Probable Causes (Ranked by Likelihood)
- Degraded crankshaft position sensor signal Very High
- Air gap too large between CKP sensor and reluctor High
- Worn reluctor ring teeth Moderate
- TCM calibration or software issue Low
Frequently Asked Questions
Can I drive with code P0726?
Drive short distances only. Engine Speed Input Circuit Range/Performance can cause unsafe or unpredictable transmission behavior.
What causes P0726?
The most common cause is a faulty sensor or wiring issue. Degraded crankshaft position sensor signal is the most likely cause.
Is P0726 expensive to fix?
Estimated repair costs range from $100 - $350 (parts and labor). Sensor replacement is the most common fix.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Monitor engine RPM on a scan tool -- look for noisy or erratic signal during shifts
-
Compare CKP sensor signal to specification using an oscilloscope
-
Check CKP sensor air gap and mounting for looseness
-
Inspect reluctor ring for damaged or worn teeth
-
Replace CKP sensor if signal quality is poor
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Commonly Affected Vehicles
- 2003-2015 Honda Accord
- 2004-2016 Nissan Pathfinder
- 2005-2017 Toyota 4Runner
- 2002-2014 Ford Explorer
Related Codes
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