Fix P076A: Mechanic’s solutions that WORKED

The code P076a: “Shift Solenoid ‘H’ Circuit” indicates an electrical issue with the shift solenoid ‘H’ in the transmission. This code suggests that there is a problem within the circuit controlling this particular solenoid, affecting the transmission’s ability to shift gears effectively. It is usually caused by electrical issues or solenoid malfunction.

P076A quick overview

Meaning	P076a: Shift Solenoid ‘H’ Circuit
Is it serious?	Yes, it can lead to transmission shifting problems, potentially affecting vehicle drivability and safety.
Possible causes	– Faulty or failing shift solenoid – Damaged wiring or connections to the shift solenoid – Transmission fluid issues (dirty or low fluid) – Malfunctioning transmission control module (TCM)
How to diagnose?	Inspect Wiring: Check for damaged or disconnected wiring to the shift solenoid. Test Solenoid: Perform electrical tests on the shift solenoid for resistance and function. Check Transmission Fluid: Ensure the fluid is clean, at the correct level, and not burnt. Diagnose TCM: Evaluate the transmission control module for faults or software updates. Scan for Additional Codes: Use a diagnostic scanner to check for other related transmission codes.

In simpler terms, the P076a code means there’s an issue with one of the small electrical components (shift solenoid ‘H’) inside your transmission. This part helps manage how and when your car changes gears. If there’s a problem here, you might notice your car isn’t shifting gears as smoothly as it should, or it might behave unpredictably. This issue is usually related to the electrical system or the transmission fluid and needs to be fixed to keep your car running properly.

How to fix P076A – learn from mechanics

I looked into P076A service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.

Case #1: Dodge

Vehicle Information

• 2009 Dodge Journey R/T 3.5L

Issue + Repair History

• Initially came in with a broken transfer case; replaced in January
• Returned in March with bad U-joints in rear drive shaft; shaft replaced
• Came back with transmission in limp mode, code P076a
• Replaced PCM and smart fuse box
• Replaced alternator after failure to charge
• Car returned with same transmission code and power issues

Other OBD2 Codes + Test Results

• P076a

Suggested Fixes

• Conduct manual step-by-step diagnostics for 62TE verification test
• Ensure correct tire circumference after new parts installation
• Check solenoid assembly or wiring for issues
• Load test wiring to check for shorts
• Consider replacing solenoid pack in transmission valve body

Final Fix

• Tested solenoids, found one was bad
• Replaced solenoid pack, resolving the issue

Case #2: Toyota

Vehicle Information

• 2012 Toyota Camry SE 2.5L

Issue + Repair History

• Customer reported intermittent shifting issues
• Diagnostic revealed code P076a, indicating a transmission shift solenoid problem
• Noticed erratic shifts and occasional slipping in transmission

Other OBD2 Codes + Test Results

• P076a

Suggested Fixes

• Inspect wiring to the transmission solenoid for any damage or disconnections
• Conduct electrical resistance tests on the shift solenoids
• Check transmission fluid level and quality; change if necessary

Final Fix

• Found a damaged wire to the shift solenoid and repaired it
• Cleared code and confirmed smooth shifting during test drive

Case #3: Ford

Vehicle Information

• 2015 Ford F-150 XLT 3.5L EcoBoost

Issue + Repair History

• Transmission not shifting correctly, especially in higher gears
• Code P076a retrieved during initial scan
• Shifts felt delayed and harsh

Other OBD2 Codes + Test Results

• P076a

Suggested Fixes

• Check transmission control module (TCM) for any software updates
• Inspect the shift solenoid operation through a diagnostic scanner
• Evaluate the health of the transmission fluid

Final Fix

• Updated TCM software
• Replaced transmission fluid which was found to be dirty
• Reset code, and confirmed issue was resolved

Case #4: Chevrolet

Vehicle Information

• 2013 Chevrolet Malibu LTZ 2.5L

Issue + Repair History

• Transmission stuck in a lower gear, would not shift up
• Diagnostic scan showed code P076a
• Transmission fluid appeared dark and burnt

Other OBD2 Codes + Test Results

• P076a

Suggested Fixes

• Perform a complete transmission fluid and filter change
• Test the electrical connection to the shift solenoid
• Replace shift solenoid if necessary

Final Fix

• Changed transmission fluid and filter
• Replaced faulty shift solenoid
• Cleared the code and verified that the transmission shifted properly

Case #5: Lexus

Vehicle Information

• 2014 Lexus RX 350 3.5L

Issue + Repair History

• Harsh shifting and sometimes failing to shift into higher gears
• Code P076a found during diagnosis
• Customer reported a ‘check engine’ light illuminated

Other OBD2 Codes + Test Results

• P076a

Suggested Fixes

• Inspect all related wiring and connectors for damage or corrosion
• Perform an electronic diagnostic of the transmission system
• Check for any TCM software updates

Final Fix

• Found corrosion on connector to shift solenoid, cleaned and secured connection
• Updated TCM with the latest software
• Reset the fault code and confirmed normal operation through a road test

Common Advice for Solving Code P076a	Diagnostic Step Description
Inspect Shift Solenoid Wiring	Check for any damage, disconnections, or corrosion in the wiring leading to the shift solenoid.
Test Shift Solenoids	Conduct electrical resistance tests on the shift solenoids to ensure they are functioning correctly.
Update Transmission Control Module (TCM) Software	If available, update the TCM software to ensure it is running the latest version.
Check and Replace Transmission Fluid	Evaluate the condition of the transmission fluid; change if it is dirty, burnt, or at an incorrect level.
Replace Faulty Shift Solenoid	If diagnostics indicate a malfunction, replace the specific shift solenoid that is causing issues.
Perform Electronic Diagnostic of Transmission	Use a diagnostic scanner to perform a thorough check of the transmission system for any anomalies or errors.