Error Code P2773: What It Means & What To Do?

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A decrease in the fuel consumption and the engine performance along with occasional engine stalling and not starting with improper throttle response due to transmission not engaging to 4 wheel drive mode may be an indication of problems with the transfer case system hampering the engine’s performance, thus indicating OBD Code P2773.

The Four Wheel Drive Low Switch Circuit signal is monitored by the transmission control module which sets the OBDII code when the Four Wheel Drive Low Switch Circuit is out of the factory specifications. Thus P2773 gets stored in the system when the circuit voltage is lower than the required specification.

What causes this problem with the Four Wheel Drive Low Switch Circuit Low?

• Malfunctioned four wheel drive low switch
• Open or short in the four wheel drive low switch harness
• Four wheel drive low switch circuit faulty electrical connection
• Mechanical issues with the transmission
• A faulty transmission control module
• A faulty PCM (this is a very rare occurrence though

1. Engine Control Module - ECM faults are rare but can be a big problem as faulty ECM will cause wrong vehicle operations and can also result in wrong OBD codes getting stored in the system which can also cause misdiagnosis. Thus, replace faulty ECM components now!
2. Electronic Control Unit - The ECU coordinates with the temperature sensor to control the blower fan for keeping the battery temperatures under control. So, replace faulty ECU components now!
3. Powertrain Control Module - Check for PCM error which might be due to circuit faults that might require complete replacement and reprogramming. Replace it now!
4. Diagnostic Tool - In order to detect the error, one needs high grade diagnostic tools. Visit us today to grab amazing deals.
5. Transmission Control Module - Faulty TCM can cause delayed transmission response and slipping. It can also cause hard shifts and gear stuck in neutral along with problems during downshifting,
6. 4 Wheel Drive Switch - Problematic drive switch can lead to drivability issues and lost traction control. The vehicle will not be able to switch between required drive modes and can also damage expensive transmission parts. Thus, replace faulty part now!

We at Parts Avatar Canada care for our customers, and that’s why we will help you to diagnose P2773 code by listing out some major symptoms. They are mentioned below as follows:

Common Symptoms

• Delayed shifting or vehicle not shifting into the right gear
• Transmission slipping
• Harsh shifts and stuck gear
• Decrease in fuel efficiency
• Check Engine Light illumination
• Drive modes not shifting

Learn the ways with which you can correct this trouble code P2773:

• Repair or replace any corroded or damaged wires in and around the transmission control module
• Replace transmission fluid and wiring, if not in working condition
• Replace drive switch and related faulty wiring and connectors

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of PCM, Transmission Control Module, Connectors, Transfer case internal, Four Wheel Drive Low, Switch, Digital Volt, Ohmmeter, Clutch Position Sensor and a lot more. We are sure that now all your issues would be resolved.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P2773 code to be stored:

• Begin with a visual inspection of all wiring and connectors. Repair or replace damaged, disconnected, shorted, or corroded wiring, connectors, and components as necessary.
• Retest the system after repairs are completed to ensure success. If all system wiring, connectors, and components appear to be in normal working order, connect the scanner (or code reader) to the diagnostic connector and record all stored codes and freeze frame data.
• Check for input and output voltages to the drive switch circuit and match them with the manufacturer specifications. If the voltage is low, OBD code P2773 may flash.
• Perform a continuity test for the drive switch circuit and fuses to check for the faults. Replace the faulty switch immediately.
• Faulty TCM (Transmission Control Module) and PCM should also be repaired, reprogrammed or replaced as required.

Common Mistakes When Diagnosing the P2773 Code

Some of the common mistakes done while changing diagnosing the OBD code P2773 are:

• Directly replacing the TCM without evaluation
• Simply replacing the Powertrain Control Module (PCM) without considering other possibilities of problem
• Not checking for 4 wheel drive circuit problems
• Not checking the damaged or loosened wiring and circuit problems