2003 trouble code P0775

[Ken Tx]

Recently hard shifting would occure. When an check engine light was
scanned the Blue Driver Pro Scan tool showed P0775 Pressure Control
Solenoid "B". Anyone with any experiance with this code? Thanks in
advance for help.

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[RDH]

Recently hard shifting would occure. When an check engine light was
scanned the Blue Driver Pro Scan tool showed P0775 Pressure Control
Solenoid "B". Anyone with any experiance with this code? Thanks in
advance for help.

The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the Transmission Control Module ( TCM ).

 

[Icewine]

Recently hard shifting would occure. When an check engine light was
scanned the Blue Driver Pro Scan tool showed P0775 Pressure Control
Solenoid "B". Anyone with any experiance with this code? Thanks in
advance for help.

I had a transmission solenoid issue with my 2004. My understanding is that there are three transmission solenoids: the 1-4, the 2-5, and the 3-R. This transmission is the same one used in the same vintage Explorer, and the solenoids in that vehicle can be replaced in situ. The Thunderbird has a tighter fit, so the transmission has to be dropped to access the solenoids. Seems to me I dropped around $1,500 Cdn on the repair, so all in all not too expensive. Once repaired the car shifted beautifully.

 

[doug7740]

Recently hard shifting would occure. When an check engine light was
scanned the Blue Driver Pro Scan tool showed P0775 Pressure Control
Solenoid "B". Anyone with any experiance with this code? Thanks in
advance for help.

Usually with fault code P0775 transmission shift shock will be felt. This is because the line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the Transmission Control Module (TCM).

The Pressure Control (PC) Solenoid Valve is an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. As current flow is increased, the magnetic field produced by the coil moves the solenoid plunger further away from the exhaust port, opening the exhaust port, which decreases the output fluid pressure regulated by the PC solenoid valve which ultimately decreases line pressure.

The possible causes of fault code P0775 are: Low transmission fluid level, dirty transmission fluid, a faulty line pressure solenoid ‘B’, a line pressure solenoid ‘B’ harness that is open or shorted or a line pressure solenoid ‘B’ circuit that has a poor electrical connection.

doug7740
1955 Thunderbird Blue

 

[Ken Tx]

Recently hard shifting would occure. When an check engine light was
scanned the Blue Driver Pro Scan tool showed P0775 Pressure Control
Solenoid "B". Anyone with any experiance with this code? Thanks in
advance for help.

Update not good. 2nd and 5th band broken. 60k on the clock. I had
just decided to sell "Alice". $3,250 is the price for a rebuild. Wondering
what should I do.

 

[WesTxStoner425]

You can sell cheap, alerting the new buyer to the quoted cost (but selling a car with transmission woes will knock off more than the $3250 you were quoted) or do the rebuild and possibly get a better price because of the new tranny, even though you'll be out over $3k. Either way, you're down AT LEAST that much. Do you trust this transmission shop? if you're not sure, ask around and get a second opinion. Sorry for your troubles. Where in TX are you? I'm in El Paso. Post a picture of your car, I'd like to see it.

 

[DCLadyBird]

Usually with fault code P0775 transmission shift shock will be felt. This is because the line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the Transmission Control Module (TCM).

The Pressure Control (PC) Solenoid Valve is an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. As current flow is increased, the magnetic field produced by the coil moves the solenoid plunger further away from the exhaust port, opening the exhaust port, which decreases the output fluid pressure regulated by the PC solenoid valve which ultimately decreases line pressure.

The possible causes of fault code P0775 are: Low transmission fluid level, dirty transmission fluid, a faulty line pressure solenoid ‘B’, a line pressure solenoid ‘B’ harness that is open or shorted or a line pressure solenoid ‘B’ circuit that has a poor electrical connection.

doug7740
1955 Thunderbird Blue

Thanks Doug7740! I just picked up my 2003 Thunderbird (54K miles) from a mechanic that found the P0775 error code and immediately told me that I need a new transmission. Your post gives me some hope. I also found a YouTube video concerning the use of servo bores to address this error code. Have you ever heard of that? Thanks.

 

[doug7740]

Thanks Doug7740! I just picked up my 2003 Thunderbird (54K miles) from a mechanic that found the P0775 error code and immediately told me that I need a new transmission. Your post gives me some hope. I also found a YouTube video concerning the use of servo bores to address this error code. Have you ever heard of that? Thanks.

There is a Technical Service Bulletin (TSB 09-12-12) that addresses shift concerns, the loss of 2nd, 3rd and 5th gears along with incorrect ratio diagnostic trouble codes. The procedure is to inspect and repair servo pin bore wear. If you have symptoms like shift flares, high revs between shifts, and slipping in overdrive and other gears, than the servo kit mentioned in the video would be a simple and cheaper alternative to installing brass sleeves in the transmission case. However, if you only have fault code P0775 (Pressure Control Solenoid B) without any slipping or shift flares, than I would replace the solenoid body assembly and the transmission filter first.

doug7740
1955 Thunderbird Blue

 

[DCLadyBird]

There is a Technical Service Bulletin (TSB 09-12-12) that addresses shift concerns, the loss of 2nd, 3rd and 5th gears along with incorrect ratio diagnostic trouble codes. The procedure is to inspect and repair servo pin bore wear. If you have symptoms like shift flares, high revs between shifts, and slipping in overdrive and other gears, than the servo kit mentioned in the video would be a simple and cheaper alternative to installing brass sleeves in the transmission case. However, if you only have fault code P0775 (Pressure Control Solenoid B) without any slipping or shift flares, than I would replace the solenoid body assembly and the transmission filter first.

doug7740
1955 Thunderbird Blue

Thank you! So you do not believe it is necessary to replace the transmission? FYI, the first mechanic reported trouble codes P0732 (gear 2 incorrect ratio) P0735 (gear 5 incorrect ratio) and P0775 (pressure control solenoid B) and recommended that the transmission be replaced. However, when I took my bird to Autozone P0775 was the only trouble code detected. As I mentioned, I originally took the car to the mechanic because it felt like it was struggling to to accelerate and would lurch forward at certain points. Do you think it makes sense to let the next mechanic know about the trouble code when I drop my bird off or wait until they have diagnosed the car. I could tell them that I took the vehicle to Autozone…Thanks again for taking the time to respond. Happy 4th of July!

 

[doug7740]

I never said that it wasn’t necessary to replace the transmission. Before I retired and was working at the dealership, I performed all necessary tests, checked all fault codes, monitored the transmission data while driving the vehicle and referenced all Technical Service Bulletins before coming to the conclusion that the transmission needed to be replaced. Now that you told me that you originally took the car to the mechanic because it felt like it was struggling to accelerate, (slipping?) and it would lurch forward at certain points, you may have a servo pressure loss, or because of fault code P0775 a defective Pressure Control Solenoid B. Before I would just replace the transmission, I would perform a line pressure test to see if there is any pressure loss past the servo seals. Don’t forget to start with the basics like checking the transmission fluid level before condemning the transmission.

doug7740
1955 Thunderbird Blue

 

[ty c]

Codes 0750 and 0755 on my 2003 anybody else experience this