Vehicle Shift Solenoid A Circuit Malfunction

What does that mean?

This is a generic transmission diagnostic trouble code (DTC) and typically applies to OBD-II vehicles equipped with an automatic transmission. That may include but is not limited to vehicles from Chrysler, Ford, Dodge, Hyundai, Kia, Ram, Lexus, Toyota, Mazda, Honda, VW, etc. Although generic, the exact repair steps may vary depending on year, make, model and powertrain configuration.

The purpose of the Shift Solenoid Circuit is for the PCM to monitor the shift solenoids to manage the movement of fluid between various hydraulic circuits and change the transmission gear ratio at the appropriate time. This process maximizes the performance level of the engine at the lowest RPM possible.

When the Powertrain Control Module (PCM) detects a malfunction within the Shift Solenoid “A” Shift Circuit a variety of codes can be triggered depending on the specific vehicle, transmission and the number of gears incorporated into the specific automatic transmission. In this case, the P0750 OBD-II trouble code is associated with a general malfunction with the the transmission Shift Solenoid “A” Circuit.

Symptoms of a P0750 trouble code may include:

• Transmission slipping
• Transmission overheating
• Transmission catches in gear
• Decreased fuel economy
• Possibly misfire-like symptoms
• Vehicle enters limp mode Check
• Engine Light illuminated

Causes for this P0750 transmission code may include:

• Insufficient fluid level
• Dirty or contaminated fluid
• Dirty or clogged transmission filter
• Defective transmission valve body
• Restricted hydraulic passages
• Transmission has internal failure
• Faulty shift solenoid Corroded or damaged connector
• Faulty or damaged wiring Faulty PCM

What are some common repairs for this code?

• Changing the fluid and filter
• Repair replace a faulty shift solenoid
• Repair or replace defective transmission valve body
• Repair or replace defective transmission
• Transmission flush to clean passages
• Cleaning corrosion from connectors
• Repairing or replacing wiring
• Flashing or replacing PCM

Hopefully, the information in this article has been helpful to point you in the right direction to correct the problem with your Shift Solenoid Circuit fault code. This article is strictly informational and the specific technical data and service bulletins for your vehicle should always take priority.

P0302 – Meaning, Causes, Symptoms, & Fixes

What Does Code P0302 Mean?

Your vehicle moves when gasoline is burned and power is generated inside a chamber known as the cylinder. Most engines have a 4, 6, or 8-cylinder engine, where more cylinders typically mean more power. Power is generated by pistons that move up and down while fuel is ignited at very specific times. A misfire typically occurs when the timing of this ignition is off. P0302 indicates that cylinder #2 is experiencing misfires.

P0302 Causes

• Faulty or worn spark plugs and/or spark plug wires
  
• Ignition issues, including failing or damaged ignition coils
• Distributor failure
  
• Faulty fuel injector
  
• Vacuum leak
  
• Low fuel pressure
  
• Camshaft and/or crankshaft sensor defective
  
• Engine timing off
  
• Leaking head gasket
  
• Low engine compression
  
• Poor quality fuel that is old or contaminated

P0302 Symptoms

• Check Engine Light is on or flashing
  
• Engine runs rough, hesitates, or jerks when accelerating
  
• Drivers may not notice any adverse conditions when driving
  
• In some cases, drivers may experience decreased fuel economy, fuel smell from exhaust, rough idling, or lack of power from the engine
  
• Commonly associated with error codes: P0300, P0301, P0303, P0304, P0305, P0306, P0307, P0308

How Do I Fix Code P0302?

With a misfire fault, the first step is to get it diagnosed to figure out what is causing the engine to misfire and fixed all the possible causes diagnosed.

If your vehicle is misfiring and you’re not comfortable diagnosing this issue at home, we recommend finding a RepairPal certified shop nearby to pinpoint the problem and give an accurate estimate for repairs.

These shops can not only help you figure out what’s going wrong before you waste time and money on the wrong parts, but they also offer a minimum 12-month, 12,000-mile warranty and stand behind all their estimates with guaranteed fair pricing.

Common P0302 Diagnosis Mistakes

Loose fitting electrical connectors and broken or disconnected vacuum hoses are often overlooked. Oxygen sensor(s) are another common misdiagnosis for P0302