LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 97 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P2195, DTC P2196, DTC P2197, DTC P2198, DTC P2237 & DTC P2240 >> Diagnosis & Repair

Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. If there any other codes (besides DTCs P2195, P2196, P2197, P2198, P2237 or P2240) being output, diagnose those DTCs first. If not, go to next step.
  2. Check connection of PCV hose. Repair or replace PCV hose as necessary. If PCV hose is okay, go to next step.
  3. Connect the OBD-II scan tool or hand-held tester to the DLC3. Warm up the A/F sensors (bank 1, 2 sensor 1) with the engine at 2500 RPM for approximately 90 seconds. On hand-held tester only, select ENHANCED OBD2/SNAPSHOT/MANUAL SNAP SHOT/ ALL mode. On either hand-held tester or OBD-II scan tool, read voltage of A/F sensors (bank 1, 2 sensor 1) on the screen of the OBD-II scan tool or hand-held tester when performing following conditions. Voltage of AFR(+) - E1 (-) or AFL(+) - E1 (-) terminals of ECM is fixed at 3.3 volts and voltage of terminals AFR (-) - E1 or AFL (-) - E1 (-) is fixed at 3.0 volts. See Figure-Figure . If system is okay, go to step  14. If system is not okay, go to next step.
    NOTE: Under normal condition, when the vehicle is driven, in the case that the output voltage of the A/F sensors is below 2.8 volts on hand-held tester, or 0.76 volts on OBD-II scan tool, during fuel enrichment (for example, when the vehicle tries to overtake another vehicle on a highway, the vehicle speed is suddenly increased with the accelerator pedal fully depressed), the A/F sensors are functioning normally. Under malfunction condition, whenever the output voltage of the A/F sensors remains at approximately 3.3 volts for hand-held tester, or 0.660 volts for OBD-II tester under any conditions as well as the above conditions, the A/F sensors may have an open circuit. This will happen also when the A/F sensor heater has an open-circuit. Whenever the output voltage of the A/F sensors remains at a certain value of approximately 3.8 volts or more for hand-held tester or 0.76 volts or more for OBD-II scan tool, or 2.8 volts or less for hand-held tester or 0.56 volts or less OBD-II scan tool under any conditions as well as the above conditions, the A/F sensor may have a short-circuit.
  4. Check for open and short in harness and connector between ECM and A/F sensors (bank 1 and/or 2 sensor 1). Repair or replace harness or connector. If okay, go to next step.
  5. Check resistance of A/F sensor heater. See SENSOR OPERATING RANGE CHARTS article. Replace A/F sensor as necessary. If A/F sensor is okay, go to next step.
  6. Check air induction system. See AIR INDUCTION SYSTEMS in SYSTEM & COMPONENT TESTING - ES300 & RX300 article. Replace air induction system as necessary. If air induction system is okay, go to next step.
  7. Check fuel pressure. See FUEL SYSTEM in SYSTEM & COMPONENT TESTING - ES300 & RX300 article. Check and repair fuel pump, fuel pipe line and filter as necessary. If okay, go to next step.
  8. Check injector injection. See FUEL SYSTEM in SYSTEM & COMPONENT TESTING article. Replace injector as necessary. If okay, go to next step.
  9. Check gas leakage on exhaust system. Repair as necessary. If okay, go to next step.
  10. Replace A/F sensor (bank 1 and/or 2 sensor 1). Go to next step.
  11. Perform confirmation driving pattern. See CONFIRMATION DRIVING PATTERN  under DTC P0134 & P0154. Go to next step.
  12. If DTC P2195, P2196, P2197, P2198, P2237 and/or P2240 are being output again, check and replace ECM. If DTCs are not output again, go to next step.
  13. Determine whether vehicle ran out of fuel in the past. If not, check for intermittent problems. If yes, go to next step.
  14. DTC P2195, P2196, P2197, P2198, P2237 and/or P2240 is caused by shortage of fuel. Perform confirmation driving pattern. See CONFIRMATION DRIVING PATTERN  under DTC P0134 & P0154. Go to next step.
  15. If DTC P2195, P2196, P2197, P2198, P2237 and/or P2240 are being output again, go to next step. If not, go step  19.
  16. Replace A/F sensors (bank 1 ,2 sensor 1). Go to next step.
  17. Perform confirmation driving pattern. See CONFIRMATION DRIVING PATTERN  under DTC P0134 & P0154. Go to next step.
  18. If DTC P2195, P2196, P2197, P2198, P2237 and/or P2240 are output again, check and replace ECM. If not, go to next step.
  19. If vehicle ran out of fuel in the past, go to next step. If not, check for intermittent problems.
  20. DTC P2195, P2196, P2197, P2198, P2237 and/or P2240 were caused by shortage of fuel.
scientia non olet · About LEMON Manuals