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P1607 Serial Communication Problem With Device 7


P1607 Serial Communication Problem With Device 7




The P1607 code is a diagnostic trouble code (DTC) that indicates a serial communication problem with device 7 in the vehicle's network. Device 7 is usually the powertrain control module (PCM), which is the main computer that controls the engine and transmission functions. The PCM communicates with other devices, such as the engine control module (ECM), the transmission control module (TCM), the instrument cluster, and the diagnostic scan tool, through serial data lines. If there is a problem with the serial data communication, such as a short circuit, an open circuit, a poor connection, or a faulty device, the PCM may set the P1607 code and turn on the check engine light.


What are the possible causes of the P1607 code?




According to various sources , some of the possible causes of the P1607 code are:


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  • Faulty PCM



  • Faulty ECM



  • Faulty TCM



  • Faulty device 7



  • Shorted or open serial data line



  • Poor electrical connection at the PCM, ECM, TCM, or device 7



  • Corroded or damaged connector pins at the PCM, ECM, TCM, or device 7



  • Inconsistent coolant temperature reading




How to diagnose and fix the P1607 code?




The diagnosis and repair of the P1607 code may vary depending on the make and model of the vehicle, as well as the type and location of device 7. However, some general steps that can be followed are:



  • Use a scan tool to retrieve the freeze frame data and any other codes that may be stored in the PCM. Note the conditions when the code was set and clear the codes.



  • Perform a visual inspection of the wiring harness and connectors related to device 7. Check for any signs of damage, corrosion, loose connections, or broken pins. Repair or replace any faulty components as needed.



  • Check if there are any technical service bulletins (TSBs) or recalls issued by the manufacturer for the vehicle model and year that may be related to the P1607 code. Follow the recommended procedures if applicable.



  • Test the serial data line for continuity and resistance using a digital multimeter. Compare the readings with the specifications provided by the manufacturer. If there is an open or short circuit in the line, locate and repair the source of the problem.



  • Test the power and ground circuits of device 7 using a digital multimeter. Compare the readings with the specifications provided by the manufacturer. If there is a problem with the power or ground supply, locate and repair the source of the problem.



  • Test device 7 for proper operation using a scan tool or other diagnostic equipment. Follow the instructions provided by the manufacturer or refer to a reliable source of information. If device 7 is faulty, replace it with a new or remanufactured one.



  • Test the PCM for proper operation using a scan tool or other diagnostic equipment. Follow the instructions provided by the manufacturer or refer to a reliable source of information. If PCM is faulty, replace it with a new or remanufactured one.



  • Erase the codes and perform a road test to verify if the problem has been resolved. If not, repeat the steps until the root cause is identified and fixed.




What is the cost to diagnose and fix the P1607 code?




The cost to diagnose and fix the P1607 code may vary depending on several factors, such as:



  • The labor rate and time charged by the auto repair shop



  • The make and model of vehicle



  • The type and location of device 7



  • The availability and price of replacement parts




According to one source, The average cost for diagnosing this code is between $75 and $150 per hour. The average cost for replacing device 7 is between $200 and $500. The average cost for replacing the PCM is between $500 and $1500.


Conclusion




The P1607 code is a serious issue that can affect the performance and drivability of the vehicle. It is important to address this code as soon as possible to prevent further damage to the vehicle's network and components. By following the steps outlined above, the P1607 code can be diagnosed and fixed with the help of a professional mechanic or a DIY enthusiast.


References:



  • [P1607 Chevrolet Code - Serial Communication Problem With Device 7]



  • [P1607 Code Meaning, Causes, Symptoms, & Tech Notes - Engine-Codes.com]



  • [Code P1607 today, with CEL. Allpar Forums]






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