LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Dodge and Ram >> 1996 >> Caravan Base, 3.3 R >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls - Tests W/Codes - 2.4L) >> Trouble Code Tests >> Test TC-102A - Upstream O2 Sensor Slow Response
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Test TC-102A - Upstream O2 Sensor Slow Response

WARNING: This page is about a different variant/trim than selected.
NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY  . For wiring diagram, see WIRING DIAGRAMS - 2.4L article.
  1. This Diagnostic Trouble Code (DTC) may be stored in Powertrain Control Module (PCM) if voltage on upstream oxygen sensor, mounted on the exhaust manifold, is switching from less than .39 volt to more than .6 volt fewer times than required. Possible causes are: dirt/moisture or grease inside connector, exhaust leak, fuel contamination or engine mechanical problem. Go to next step.
  2. Start engine. Check for exhaust leaks between engine and catalytic converter. If no exhaust leaks exist, go to next step. If exhaust leaks exist, repair as necessary. Perform TEST VER-5A.
  3. Check exhaust for excessive smoke caused by high oil consumption. If excessive smoke and high oil consumption does not exist, go to next step. If excessive smoke and high oil consumption exists, repair engine as necessary. Replace catalytic converter. Perform TEST VER-5A.
  4. Ensure ignition is off. Disconnect connector at upstream oxygen sensor, mounted on the exhaust manifold. Using scan tool in ohmmeter mode, check resistance at terminal No. 3 (Black/Light Blue wire) on connector for upstream oxygen sensor.
  5. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit in Black/Light Blue wire between PCM and upstream oxygen sensor. The PCM is located between driver's side front fender and power distribution center, near battery. Perform TEST VER-5A.
  6. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
  7. Inspect connectors for damaged terminals. If connectors or terminals are damaged, repair as necessary. Perform TEST VER-5A. If connectors and terminals are not damaged, replace upstream oxygen sensor. Perform TEST VER-5A.
scientia non olet · About LEMON Manuals