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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What Are the Symptoms of P0726?
- Check Engine Light illuminated
- Harsh or delayed shifting
- Engine RPM flare during shifts
- Transmission slipping sensation
What Causes P0726? (Most Likely First)
- 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
Can I Still Drive with P0726?
Short distances only. P0726 is rated critical severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
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
How Do You Diagnose P0726?
-
Monitor engine RPM on a scan tool -- look for noisy or erratic signal during shifts
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Compare CKP sensor signal to specification using an oscilloscope
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Check CKP sensor air gap and mounting for looseness
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Inspect reluctor ring for damaged or worn teeth
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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)
Which Vehicles Commonly Get P0726?
- 2003-2015 Honda Accord
- 2004-2016 Nissan Pathfinder
- 2005-2017 Toyota 4Runner
- 2002-2014 Ford Explorer
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