Gear Shift Position Control Performance
The P0918 code means the vehicle's onboard diagnostic system has detected: Gear Shift Position Control Performance. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $150 - $1,200 (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 P0918?
- Check Engine Light on
- Automated gear selection not performing
- Transmission may enter limp mode
- Abnormal transmission behavior
What Causes P0918? (Most Likely First)
- Gear shift actuator not meeting target Very High
- Contaminated or low transmission fluid High
- Wiring or connector fault in the circuit Moderate
- TCM internal failure Low
Can I Still Drive with P0918?
Short distances only. P0918 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What does P0918 indicate?
P0918 indicates a problem with the gear shift position control performance. This is a transmission control system code that requires professional diagnosis.
Do I need a transmission rebuild?
Not necessarily. Many transmission codes are caused by solenoid failures, sensor issues, or fluid problems that can be repaired without a full rebuild.
How important is transmission fluid condition?
Very important. Contaminated or degraded fluid is a leading cause of transmission problems. It causes solenoid sticking, valve body issues, and accelerated clutch wear. Regular fluid changes can prevent many of these codes.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0918?
-
Use a scan tool to read Gear Shift Position Control Performance related data
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Check transmission fluid level, condition, and color
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Inspect the transmission wiring harness and connector for damage or corrosion
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Compare sensor readings to manufacturer specifications
Sources 2
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)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get P0918?
- 2010-2020 Ford F-150
- 2012-2019 Chevrolet Silverado
- 2011-2020 Toyota Camry
- 2009-2019 Honda Accord
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