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P0102 OBD2 Code in 1998 Ford Contour: Causes and DIY Fixes

Model: 98 Ford Contour Fault Code: P0102 Posted: 2016-10-20 11:36

My girlfriend's 1998 Ford Contour has been experiencing intermittent engine stalling after driving for a short distance. The car was previously diagnosed with a faulty alternator, which was replaced by a friend—however, the issue persists. After installing a new battery and having the vehicle scanned at AutoZone, code P0102 appeared. The car runs briefly before dying unexpectedly. I'm wondering if this is due to using an incorrect alternator or improper wiring (e.g., wire connections not properly secured), or whether it's actually related to airflow sensor issues as suggested by the diagnostic tool. I hope this can be resolved through a DIY fix, especially since we paid for the repair and want to avoid further costs. Could someone clarify if P0102 is directly linked to starting problems? And what steps should I take next—such as checking fuses (especially 15A and 175A alternator fuses) or performing a charging system test? Any guidance on how to troubleshoot this at home would be greatly appreciated.

Related fault codes

P0102

Comments (5)

Anonymous 2016-10-20 12:02

The term 'hot shot' likely refers to jump-starting. There should be no wires that are disconnected or improperly connected—such wiring suggests the technician was unqualified. A charging system check is recommended and may be available free at some auto parts stores, though the accuracy of the test depends on the technician's skill. According to OBD2 code P0102 (Mass Airflow Sensor Circuit Range/Performance), this does not affect engine starting. Please verify all relevant fuses, especially the 15-amp and 175-amp alternator fuses. Source: https://www.obd-codes.com/p0102

Anonymous 2016-10-20 15:41

Yes, 'hot shot' means jump-starting. The friend installed the wrong alternator and rigged it to work just enough to get paid—this is concerning. If the alternator issue still persists, why did the scanner show an airflow-related code? I'm not a mechanic, but I hope to fix this myself or at least be able to assess whether the person helping me knows what they're doing.

Anonymous 2016-10-20 16:26

This involves two separate issues: 1. Charging system (starting and alternator function) — check all fuses, especially the 15A and 175A alternator fuses. A free diagnostic may be available at some auto parts stores. 2. P0102 code — as per OBD2 reference, this relates to airflow sensor performance but does not interfere with engine starting or charging function. It should be evaluated independently.

Anonymous 2016-10-22 13:53

I purchased a 2004 Ford Taurus and noticed the check engine light came on after leaving the dealership. The car felt shaky, and I found codes P0304, P0316, and P0352. Should I have the seller repair these issues or are they permanent? Are these misfire/ignition-related codes?

Anonymous 2016-10-23 07:13

Misfire and ignition-related codes (like P0304, P0316, P0352) are not permanent. If the dealership is reputable, they should repair these issues at no cost—take it back to them for service.