Check engine light codes P0700, P0157 and P0776

Welcome to 2CarPros.

The p0700 is an informational code. It is sent by the transmission control module (TCM) when a fault is indicated. Now, the shift issue is more than likely related to the p0776. That code indicates that Clutch Pressure Control (PC) Solenoid 2 is stuck off.

Now, this could be as simple as low or dirty transmission fluid or an issue with the 3-5-R clutch, or a pressure solenoid issue. I am going to provide the diagnostics for it. Don't be overwhelmed.

P0777

The TCM detects an incorrect off-going clutch gear ratio, or tie-up, when the 3-5-R clutch is commanded OFF for 1.2 seconds and the transmission input shaft speed is 40 RPM or less from the anticipated input shaft speed.

Action Taken When the DTC Sets

* DTCs P0776 and P0777 are Type A DTCs.
* The TCM commands maximum line pressure.
* The TCM inhibits TCC.
* The TCM freezes transmission adaptive functions.

Conditions for Clearing the DIC/DTC

DTCs P0776 and P0777 are Type A DTCs.

Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.

Special Tools Required

* DT-47825 Control Solenoid Test Plate
* DT-47825-10 Jumper Harness

Circuit/System Verification

1. Perform the Transmission Fluid Check. See: Automatic Transmission/Transaxle > Component Tests and General Diagnostics > Transmission Fluid Check
2. Operate the vehicle in drive with the calculated throttle position greater than 15 percent to obtain 72 km/h (45 mph).

* If the DTC resets, go to Circuit/System Testing.

Circuit/System Testing

1. Perform the Line Pressure Check. See: Automatic Transmission/Transaxle > Component Tests and General Diagnostics > Line Pressure Check

* If the pressure is out of specification, correct this concern first.

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning and retest the DTC as outlined in the Circuit/System Verification steps. See: Automatic Transmission/Transaxle > Component Tests and General Diagnostics > Control Solenoid Valve and Transmission Control Module Assembly Cleaning

* If the DTC resets, continue on with testing.

3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection. See: Automatic Transmission/Transaxle > Component Tests and General Diagnostics > Control Solenoid Valve and Transmission Control Module Assembly Inspection

* If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.

4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test. See: Automatic Transmission/Transaxle > Component Tests and General Diagnostics > Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test

* If the solenoid is found to be leaking or stuck closed, replace the control solenoid (w/body and TCM) valve assembly.

5. Inspect the control valve lower body assembly for sticking valves, damage, scored bores, or debris.

* If a concern if found in the valve body, repair or replace the valve body as necessary.

6. Inspect the 3-5-R clutch assembly for damage.

* If a concern is found in the 3-5-R clutch assembly, repair or replace as necessary.

Component Testing

pic 1

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests

* Control valve body replacement - refer to Control Valve Lower Body and Upper Body Replacement.
* 3-5-R clutch assembly repair or replacement - refer to Low and Reverse Clutch and 1-2-3-4 Clutch Plate Removal.
* Control solenoid (w/body and TCM) valve assembly replacement - Refer to Programming and Relearning for replacement, setup, and programming.
* Perform the Service Fast Learn Adapts. See: Vehicle > Programming and Relearning

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As you can see, it can get involved. What I do suggest is to check the transmission fluid and level to see if that can be causing a pressure issue.

The directions for checking, adding and so on are basically located in the pics starting with number 2. Here are the few words they added.

Transmission Fluid Check

Transmission Fluid Check
pic 2

The oil level control plug (65) is located on the torque converter side of the transmission.

Step 1 - Step 8
pic 3

Step 9
pic 4

Step 10 - Step 11
pic 5

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Check that first and let me know what you find.

Take care,
Joe

Welcome back:

This doesn't sound related to the transmission, but low voltage has caused many problems in the past. If I had to guess, since it died while you were driving, the alternator would be my first suspect. However, the battery may have failed as well.

Here is what I suggest. First, confirm that the battery terminals are clean and tight. If they are, try to load test the battery. If it fails, disconnect the battery and charge it. Once fully charged, reconnect it and see if the car will start. Please keep in mind, if you don't have a charger, remove the battery and take it to a nationally recognized parts store. Most of them will charge it for you and the load test it for free. If after being charged the car will start, then I need you to check the alternator. I will provide you with links that explain everything I just suggested:

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https://www.2carpros.com/articles/how-a-car-battery-works

https://www.2carpros.com/articles/symptoms-of-a-bad-car-battery

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

https://www.2carpros.com/articles/how-to-charge-your-car-battery

https://www.2carpros.com/articles/car-battery-load-test

https://www.2carpros.com/articles/how-to-replace-a-car-battery

Once you get it started, here is a link that shows how to test an alternator. You will need a basic volt meter or multi meter.

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https://www.2carpros.com/articles/how-to-check-a-car-alternator

https://www.2carpros.com/articles/how-to-use-a-voltmeter

If you find the alternator is bad, here is a link that shows in general how one is replaced.

https://www.2carpros.com/articles/how-to-replace-an-alternator

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Here are the directions specific to your vehicle. The attached pictures correlate with the directions.

Generator Replacement (LY7)

Removal Procedure

pic 1

1. Disconnect the negative battery cable.
2. Reposition the positive battery cable boot at the generator terminal.
3. Remove the positive battery cable nut at the generator.
4. Remove the positive battery cable terminal from the generator.

pic 2

5. Disconnect the engine harness electrical connector from the generator.
6. Remove the drive belt.

pic 3

7. Remove the idler pulley.
8. Remove the generator bolts.

Important: When removing the generator from the vehicle, it may be necessary to maneuver the generator to remove it from the vehicle.

9. Remove the generator.

Installation Procedure

pic 4

1. Position the generator to the engine.
2. Loosely install the generator bolts.
3. Install the idler pulley.

Notice: Refer to Fastener Notice.

4. Tighten the generator bolts in the sequence shown.

Tighten the bolts to 50 N.m (37 lb ft).

pic 5

5. Install the drive belt.
6. Connect the engine harness electrical connector to the generator.

pic 6

7. Install the positive battery cable terminal to the generator.
8. Install the positive battery cable nut at the generator.

Tighten the nut to 20 N.m (15 lb ft).

9. Position the positive battery cable boot at the generator terminal.
10. Connect the negative battery cable.

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Let me know what you find or if you have other questions.

Take care,
Joe

Welcome back:

Is the third gear problem gone? Is the reverse something new? I would hate to see you get stuck and need to back up. Also, most part store scanners may not be able to read transmission codes. Instead, they only can provide the generic P0700 which simply means the transmission control module and sent a signal that a problem exist.

Were you able to check the transmission fluid level and condition?

Joe

Welcome back:

I'm not familiar with a wave plate. Could it have been something different?

Joe