DTC P0777: A/T Clutch Pressure Control Solenoid Valve B Stuck ON
WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the GENERAL TROUBLESHOOTING INFORMATION
- If DTC P0777 is stored in the PCM, the transmission does not shift to any gear other than 3rd or 6th gear because of the fail-safe function.
- Warm up the engine to normal operating temperature (the radiator fan comes on).
- Make sure that the transmission is filled to the proper level, and check for fluid leaks.
- Drain the ATF (see
step 5 under ATF Replacement
) through a strainer. Inspect the strainer for metal debris or excessive clutch material.
Does the strainer have metal debris or excessive clutch material?
YES -Replace the transmission.
NO -Replace the ATF (see step 8 under ATF Replacement ), then go to step 4.
- Turn the ignition switch to ON (II).
- Clear the DTC with the HDS.
- Start the engine. With the brake pedal pressed, shift to D.
- Check the 3rd Pressure Switch signal and the 6th Pressure Switch signal with the HDS in the A/T Data List.
Does the 6th Pressure Switch turn on momentarily, then does the 3rd Pressure Switch turn on with a harsh shift?
YES -Faulty A/T clutch pressure control solenoid valve B. Replace the secondary valve body (A/T clutch pressure control solenoid valve B) (see SECONDARY VALVE BODY REPLACEMENT ).
NO -Intermittent failure, the system is OK at this time.