Possible Causes

1999 Mercury Tracer LS, 4D Sedan, StandardSECTION Possible Causes

Non-volatile memory configuration failure could be caused by an improper configuration file or a damaged or inoperative ECS module.

  1. Check For Hard Or Intermittent DTC  - Ensure ignition is off. Connect NGS tester to DLC. See USING NGS TESTER  under DIAGNOSIS & TESTING. Turn ignition switch to RUN position. Retrieve and record any continuous DTCs. See RETRIEVING FAULT CODES  under DIAGNOSIS & TESTING. Perform on-demand self-test. See ON-DEMAND SELF-TEST  under DIAGNOSIS & TESTING. If DTC B2141 was retrieved during on-demand self-test, replace ECS module. Go to next step. See ELECTRONIC CRASH SENSOR under REMOVAL & INSTALLATION  . If DTC B2141 was not retrieved, fault is intermittent. Go to next step.
  2. Check For Additional DTCs  - Refer to continuous DTCs recorded in step 1). If any continuous DTCs were retrieved, go to DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION  table under DIAGNOSIS & TESTING for direction to appropriate test. If no continuous DTCs were retrieved, reconnect air bag system. Activate air bag system. See ACTIVATING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Clear all DTCs. See CLEARING FAULT CODES  under DIAGNOSIS & TESTING.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.