Gear 2 Incorrect Ratio
The P0732 code means the vehicle's onboard diagnostic system has detected: Gear 2 Incorrect Ratio. This is a critical severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- hard
- Estimated cost
- $200 - $4000 (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.
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Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.
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Common Symptoms
- Check Engine Light illuminated
- Slipping in second gear
- RPM flare during 1-2 upshift
- Harsh 2-3 shift
- Vehicle may skip second gear
Probable Causes (Ranked by Likelihood)
- Worn second gear clutch pack or band Very High
- Faulty shift solenoid affecting second gear High
- Low line pressure in second gear circuit Moderate
- Valve body malfunction Low
Step-by-Step Diagnostic Procedure
-
Monitor gear ratio in second gear using input and output speed sensors
-
Check shift solenoids that control second gear engagement
-
Perform a line pressure test in second gear
-
Check transmission fluid for burnt smell and metal particles
-
Internal transmission inspection or rebuild may be needed
Common Fixes by Vehicle
What techs usually find when diagnosing P0732 on specific vehicles — tap your vehicle for the fix and the exact part:
2001-2014 Honda Accord 2.4L/3.0L Automatic Easy (fluid), Advanced (rebuild) DIY
Gear 2 incorrect ratio is one of the most common Honda automatic transmission failure modes. The 2nd gear clutch pack wears prematurely, especially on 2003-2007 V6 Accords. Start with 3x drain-and-fill with Honda DW-1 ATF. If the code returns immediately, the 2nd clutch pack is worn and requires a transmission rebuild or replacement. Honda extended warranty covered this on some model years -- check with the dealer.
Labor: 30 min (fluid), 8-10 hours (rebuild)2005-2017 Toyota Camry/RAV4 U250E/U760E Easy (fluid), Advanced (solenoid) DIY
Second gear ratio error on Toyota U-series transmissions is often caused by worn B2 brake band or a sticking shift solenoid. Check ATF level and condition -- Toyota WS fluid should be cherry red, not brown. If fluid is good, use a scan tool to command solenoid tests. A sticking SL2 solenoid causes this code. Solenoid replacement is done through the valve body without full trans removal.
Labor: 30 min (fluid), 4-5 hours (solenoid)2007-2018 GM Silverado/Tahoe 6L80E Moderate (cooler), Advanced (rebuild) DIY
2nd gear ratio error on the 6L80E is caused by 2-6 clutch pack wear or a sticking pressure control solenoid. Very common on trucks used for towing. Check transmission fluid temperature history with a scan tool -- overheating accelerates clutch wear. If fluid is burnt, a rebuild is likely needed. Add an auxiliary transmission cooler to prevent future issues if the transmission is rebuilt.
Labor: 1 hour (cooler), 8-10 hours (rebuild)Frequently Asked Questions
Can I drive with code P0732?
Do not drive. An incorrect gear ratio indicates the transmission is slipping or not engaging properly. Continued driving can cause catastrophic transmission failure.
Does P0732 mean I need a new transmission?
Not always, but often. If the cause is a worn clutch pack or band, a transmission rebuild or replacement is typically necessary. If a solenoid or valve body is the cause, repair may be less extensive.
How is gear ratio measured for P0732?
The TCM compares input shaft speed to output shaft speed. The calculated ratio should match the expected gear ratio. When the ratio deviates beyond a threshold, the code is set.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P0732 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
See All Codes & Fixes for Your Vehicle
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