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Home >> Acura >> 2003 >> MDX Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Performance System Self-Diagnostics >> Diagnostic Tests >> DTC P0133 Or DTC P0153
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DTC P0133 Or DTC P0153

Code Definition

CAUTION: When substituting or replacement of PCM is recommended, see PCM REMOVAL & REPLACEMENT  for important precautions.
NOTE: This test covers both Front and Rear Air Fuel Ratio (A/F) sensors. The information will be shown Rear (Bank 1) first and Front (Bank 2) second. When discussion of PCM harness connector terminals arises, Rear (A/F) ratio sensor terminals will precede Front A/F ratio sensor terminals. Also, Front A/F ratio sensor terminal information will be enclosed in parantheses ( ).
NOTE: If DTC P0139 and/or (P0159) is set at the same time as DTC P0133 and/or (P0153), troubleshoot DTC P0139 and/or (P0159) first, then recheck for DTC P0133 and/or (P0153).
  1. Turn ignition on. Using Honda PGM Tester or the HDS, do the DTC CLEAR in the CLEAR menu.
  2. Start engine. Hold engine at 3000 RPM with no load in (Park or Neutral) until the radiator fan comes on, then let engine idle
  3. Test drive vehicle under the following conditions:
    • Engine coolant temperature more than 158°F (70°C).
    • A/T in "D" position.
    • Vehicle speed at 30 MPH or more and engine speed at 1200-2250 RPM.
  4. Using Honda PGM Tester or the HDS, check the AF FB AVE in the DATA list. If the value is 0.8-1.2, go to next step. If the value is not 0.8-1.2. Go to step  3 and recheck.
  5. Using the Honda PGM Tester or the HDS, monitor OBD STATUS for DTCs P0133 and/or (P0153) in the DTCs menu. If it is PASSED, problem is intermittent, system is OK at this time. If it FAILED, go to next step. If it is EXECUTING, continue driving condition until a result comes in. If it is OUT OF CONDITION, go to step  1 and recheck.
  6. Turn ignition off.
  7. Replace Air Fuel Ratio sensor.
  8. Turn ignition on. With the Honda PGM tester or the HDS, do PCM RESET in the CLEAR menu. Do the PCM idle learn procedure. See PCM IDLE LEARN PROCEDURE  .
  9. Start engine. Hold engine at 3000 RPM with no load in (Park or Neutral) until the radiator fan comes on, then let engine idle
  10. Test drive vehicle under the following conditions:
    • Engine coolant temperature more than 158°F (70°C).
    • A/T in "D" position.
    • Vehicle speed at 30 MPH or more and engine speed at 1200-2250 RPM.
  11. Check for Temporary DTCs or DTCs in the DTC menu. If DTCs P0133 and/or (P0153) are set, check for poor connections or loose terminals at A/F sensor (Sensor 1) and PCM connector. Go to step  1 . If any other Temporary DTCs or DTCs are set, troubleshoot those indicated. If there are no Temporary DTCs or DTCs set, go to next step.
  12. Using the Honda PGM Tester or the HDS, monitor OBD STATUS for DTCs P0133 and/or (P0153) in the DTCs menu. If it is PASSED, troubleshooting is complete. If it FAILED, check for poor connections or loose terminals at A/F sensor (Sensor 1) and PCM connector Go to step  1 . If it is EXECUTING, continue driving condition until a result comes in. If it is OUT OF CONDITION, go to step  9 and recheck.
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