SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSOLDSMOBILE1998ACHIEVA 3.1 M, 4T40E/MN4REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROLS - TESTS W/CODES - 2.4L)DIAGNOSTIC TROUBLE CODESDTC P0134 - O2S INSUFFICIENT ACTIVITY SENSOR 1DIAGNOSTIC PROCEDURES
1998 Oldsmobile Achieva 3.1 M, 4T40E/MN4

Diagnostic Procedures

1998 Oldsmobile Achieva 3.1 M, 4T40E/MN4SECTION Diagnostic Procedures
WARNING: This page is about a different variant/trim than selected.
  1. Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  , then go to next step.
  2. Ensure engine is at normal operating temperature. Start engine. Increase engine speed to 1200 RPM for 2 minutes. If scan tool indicates closed loop, go to next step. If scan tool does not indicate closed loop, go to step 4).
  3. Turn ignition on, with engine off. Using scan tool, review FREEZE FRAME data and note parameters. Start engine and operate vehicle within conditions required for setting this DTC, and as close to conditions recorded in FREEZE FRAME as possible. If scan tool indicates closed loop, go to next step. If scan tool does not indicate closed loop, go to step 12).
  4. Turn ignition on, with engine off. Disconnect O2S 1 connector. Connect a jumper wire between ground and sensor signal circuit terminal at O2S 1 harness connector. If voltage is less than 50 mV, go to next step. If voltage is not less than 50 mv, go to step 6).
  5. Turn ignition off. Inspect O2S 1 harness connector for faulty terminals or poor connection. Repair as necessary. After repairs, go to step 12). If connector is okay, go to step 9).
  6. Turn ignition on, with engine off. Disconnect jumper wire. Using DVOM, measure voltage between ground and sensor signal circuit terminal at O2S 1 harness connector. If voltage is greater than 600 mV, go to step 10). If voltage is not greater than 600 mV, go to next step.
  7. If voltage reading in step 6) is less than 300 mV, go to step 11). If voltage reading is not less than 300 mV, go to next step.
  8. Replace PCM. Program PCM using required equipment. After replacing PCM, go to next step.
  9. Replace oxygen sensor. After replacing sensor, go to step 12).
  10. Check O2S 1 ground circuit for open or poor connection at PCM. Repair as necessary. After repairs, go to step 12). If circuit is okay, go to step 8).
  11. Check O2S 1 signal circuit for open or poor connection at PCM. Repair as necessary. After repairs, go to next step. If circuit is okay, go to step 8).
  12. Using scan tool, select CLEAR INFO or CLEAR DTCS function to clear DTCs. Start engine and allow it to idle. Ensure engine is at normal operating temperature. Operate vehicle within conditions required for setting this DTC. Select SPECIFIC DTC function then enter DTC P0134. If scan tool indicates TEST RAN AND PASSED, go to next step. If scan tool does not indicate TEST RAN AND PASSED, repeat step 2).
  13. If any other DTCs are set, diagnose DTCs as necessary. If no other DTCs are set, no problem is indicated at this time.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.