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1997 sunfire: miss..ac on;scan ecm p1601 code serial data..misfires…

Customer Question
1997 sunfire quad 4;intermitent engine...
1997 sunfire quad 4;intermitent engine miss esp with ac on;scan ecm p1601 code serial data comm error but no misfires codes......so perplexed
Submitted: 8 years ago.Category: Pontiac
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Answered in 33 minutes by:
6/14/2010
Pontiac Mechanic: Amedee, Pontiac Technician replied 8 years ago
Amedee
Amedee, Pontiac Technician
Category: Pontiac
Satisfied Customers: 28,338
Experience: ASE certified Technician advanced level specialist. Wisconsin certified emissions state inspector
Verified

Hello there!

 

You could have a module shorting out pulling the other modules down. THis is very common.

 

Potential Causes:

 

Electronic Brake Control Module (EBCM)
Instrument Panel Cluster (IPC)
Powertrain Control Module (PCM)
Sensing Diagnostic Module (SDM)
Wiring

 

A scan tool will be needed to diagnose this problem. When this problem is happening, try to communicate with the Sensing Diagnostic Module, Instrument Panel Cluster, and Electronic Brake Control Module. If the scan tool cannot communicate with any of these modules, disconnect the SDM, IPC, and EBCM one at a time and recheck for scan tool communication. If there is now communication, check the wiring at the module that is affecting communication. If the wiring is ok, the module is defective. (Obviously check the basics like tune up parts, injectors, and air or vacuum leaks).

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