Definition of Code P0976
The fault code P0976 indicates that the Powertrain Control Module (PCM) has detected a voltage in one of the shift solenoid control circuits that falls below the parameters set by the vehicle manufacturer.
What does code P0976 mean?
The shift solenoid control circuit is responsible for relaying voltage and input between the shifting system and the PCM. In the case of a P0976, a lack or insufficient voltage input has been reported in the PCM, which can lead to a range of issues for the vehicle’s transmission system.
What causes code P0976?
Problems with a broken electrical circuit between the solenoid control circuit and the PCM are the most likely cause of a P0976 fault code. Technicians report that the code is often the result of a vehicle stored in poor conditions for too long, or otherwise mishandled during a previous set of repairs.
There is very little chance that the PCM itself is faulty and reporting a false issue. Although this should only be considered once all other options have been exhausted, it is still something that can be taken into account if all other components related to the code check out correctly.
What are the symptoms of code P0976?
In the case of a P0976 fault code, the vehicle may experience gear slipping or failure to shift. One or more gears may be inaccessible due to a malfunction in the solenoid control circuit. Otherwise, the transmission system may behave erratically, depending on the severity of the solenoid control circuit malfunction. A fault code and an engine warning light on the dashboard will also be present to help diagnose the problem.
How does a mechanic diagnose code P0976?
A mechanic may first identify the P0976 code by reading it via an OBD-II scanner. The solenoid itself should be checked for any signs of disconnection or failure. Circuit checks must be performed between the shift solenoid control and the PCM itself using a voltmeter. This will help identify any potential circuit issues, if any. Ensure all connectors are properly connected and note any broken, corroded, or otherwise damaged wiring.
Common mistakes when diagnosing code P0976
Components related to the transmission or shift solenoid control circuit may be mistakenly replaced when the real problem lies in broken electrical wiring.
How severe is code P0976?
If one or more gears have been made inaccessible due to the P0976 fault code, it will severely affect the vehicle’s drivability. As with any fault code related to the vehicle’s transmission system, P0976 must be taken very seriously and addressed at the earliest opportunity.
What repairs can fix code P0976?
- Replace wiring identified as corroded, broken, or disconnected
- Replace or repair the faulty solenoid
- Replace or repair a faulty component