Acura RL. Manual - part 693

Is DTC P2185 indicated?

YES - Check for poor connections or loose terminals at ECT sensor 2 and the PCM, then go to step 1.

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the
indicated DTCs troubleshooting

25. Reconnect all connectors.

26. Update the PCM if it does not have the latest software (see UPDATING THE PCM ), or substitute a

known-good PCM (see SUBSTITUTING THE PCM ).

27. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2185 indicated?

YES - Check for poor connections or loose terminals at ECT sensor 2 and the PCM. If the PCM was
updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the
PCM was substituted, go to step 1.

NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the
original PCM (see PCM REPLACEMENT ). If any other Temporary DTCs or DTCs are indicated,
go to the indicated DTCs troubleshooting

DTC P2195: REAR A/F SENSOR (BANK 1, SENSOR 1) SIGNAL STUCK LEAN; DTC P2197:
FRONT A/F SENSOR (BANK 2, SENSOR 1) SIGNAL STUCK LEAN

1. Inspect the condition of the A/F sensor (Sensor 1).

Is it loose in the exhaust pipe?

YES - Go to step 2.

NO - Go to step 4.

2. Turn the ignition switch OFF.

3. Reinstall the A/F sensor (Sensor 1) (see A/F SENSOR REPLACEMENT ).

4. Turn the ignition switch ON (II).

NOTE:



Before you troubleshoot, record all freeze data and any on-board
snapshot, and review the general troubleshooting information (see
GENERAL TROUBLESHOOTING INFORMATION ).



Information marked with an asterisk (*) applies to the front bank (Bank
2).



If the vehicle was out of fuel and the engine stalled before this DTC was
stored, refuel and clear the DTC with the HDS.



If DTC P2101, P2108, P2118, P2135, P2138, P2176, U0107, or a
combination of P2122 and P2T27, P2122 and P2138, or P2127 and
P2138 is stored at the same time, troubleshoot those DTCs first, then
recheck for DTC P2195 and/or P2197*.

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:59 PM

5. Reset the PCM with the HDS.

6. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).

7. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2195 and/or P2197* indicated?

YES - Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM, then
go to step 1.

NO - Go to step 8.

8. Monitor the OBD STATUS for DTC P2195 and/or P2197* in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 7,
go to the indicated DTCs troubleshooting

NO - If the screen indicates FAILED, check for poor connections or loose terminals at A/F sensor
(Sensor 1) and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, keep idling
until a result comes on.

DTC P2227: BARO SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM

1. Turn the ignition switch ON (II), and wait 2 seconds.

2. Check the BARO SENSOR in the DATA LIST with the HDS.

Is about 101 kPa (29.9 in.Hg, 760 mmHg), or about 2.9 V at sea level indicated?

YES - Go to step 3.

NO - Update the PCM if it does not have the latest software (see UPDATING THE PCM ), or
substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the
symptom/indication goes away with a known-good PCM, replace the original PCM (see PCM
REPLACEMENT )

3. Clear the DTC with the HDS.

4. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the

radiator fan comes on, then let it idle.

5. Test-drive under these conditions:



Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C)

NOTE:



Before you troubleshoot, record all freeze data and any on-board
snapshot, and review the general troubleshooting information (see
GENERAL TROUBLESHOOTING INFORMATION ).



If DTC P0107, P0108, P1128, and/or P1129 are stored at the same time
as DTC P2227, troubleshoot those DTCs first, then recheck for DTC
P2227.

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:59 PM



Transmission in D position



Throttle position between 14 degrees and 45 degrees for 2 seconds

6. Monitor the OBD STATUS for DTC P2227 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Intermittent failure, the system is OK at this time

NO - If the screen indicates FAILED, go to step 7. If the screen indicates NOT COMPLETED, go to
step 4.

7. Update the PCM if it does not have the latest software (see UPDATING THE PCM ), or substitute a

known-good PCM (see SUBSTITUTING THE PCM ).

8. Reset the PCM with the HDS.

9. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).

10. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the

radiator fan comes on, then let it idle.

11. Test-drive under these conditions:



Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C)



Transmission in D position



Throttle position between 14 degrees and 45 degrees for 2 seconds

12. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2227 indicated?

YES - If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ),
then go to step 10. If the PCM was substituted, go to step 1.

NO - Go to step 13.

13. Monitor the OBD STATUS for DTC P2227 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the
original PCM (see PCM REPLACEMENT ). If any other Temporary DTCs or DTCs were indicated
in step 12, go to the indicated DTCs troubleshooting

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the PCM. If
the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then go
to step 10. If the PCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, go to
step 10.

DTC P2228: BARO SENSOR CIRCUIT LOW VOLTAGE

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot,
and review the general troubleshooting information (see GENERAL

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:59 PM

1. Turn the ignition switch ON (II).

2. Check the BARO SENSOR in the DATA LIST with the HDS.

Is about 53 kPa (15.6 in.Hg, 397 mmHg), or 1.58 V or less indicated?

YES - Go to step 3.

NO - Intermittent failure, the system is OK at this time

3. Update the PCM if it does not have the latest software (see UPDATING THE PCM ), or substitute a

known-good PCM (see SUBSTITUTING THE PCM ).

4. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2228 indicated?

YES - Check for poor connections or loose terminals at the PCM. If the PCM was updated, substitute
a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the PCM was substituted
in step 3, go to step 1.

DTC P2229: BARO SENSOR CIRCUIT HIGH VOLTAGE

1. Turn the ignition switch ON (II).

2. Check the BARO SENSOR in the DATA LIST with the HDS.

Is about 160 kPa (47.2 in.Hg, 1,200 mmHg), or 4.5 V or more indicated?

YES - Go to step 3.

NO - Intermittent failure, the system is OK at this time

3. Update the PCM if it does not have the latest software (see UPDATING THE PCM ), or substitute a

known-good PGM (see SUBSTITUTING THE PCM ).

4. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2229 indicated?

YES - Check for poor connections or loose terminals at the PCM. If the PCM was updated, substitute
a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the PCM was substituted

TROUBLESHOOTING INFORMATION ).

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot,
and review the general troubleshooting information (see GENERAL
TROUBLESHOOTING INFORMATION ).

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:59 PM

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