2011-2015 CX-9 – MIL ILLUMINATION WITH DTCs P219A:00 AND/OR P219B:00
APPLICABLE MODEL(S)/VINS
2011-2015 CX-9
MIL illumination with DTC P219A:00 and/or P219B:00 stored in PCM memory.
| DTC | Description |
| P219A:00 | Bank 1 Air-Fuel Ratio Imbalance |
| P219B:00 | Bank 2 Air-Fuel Ratio Imbalance |
The DTCs may be caused by abnormal electrical noise within the engine harness of certain vehicles.
To eliminate this concern, separate the A/F sensor signal lines from the emission harness by installing the short cord service part.
REPAIR PROCEDURE
Summary:
- Verify that DTC P219A:00 and/or P219B:00 is stored in PCM memory.
NOTE:
- The repairs are slightly different depending on which DTC is stored in PCM memory. Be sure to proceed to the correct repair for the DTC that is found.
- If both DTCs are stored in PCM memory, complete both repairs.
- Remove (pull out) four (4) terminals from PCM connector 0140-010B.
- Replace the four (4) removed terminals with the correct four (4) short cord terminals.
- Route the short cord (A) from connector 0140-010B and the A/F sensor connector 0140-24 (for DTC P219A:00) OR connector 0140-25 (for DTC P219B:00).
| For DTC P219A:00 | For DTC P219B:00 |
 | |
- Pull out two (2) A/F Sensor terminals (C and E) from connector 0140-24 (for DTC P219A:00) OR connector 0140-25 (for DTC P219B:00), then install them into the short cord connector.
REPAIR PROCEDURE FOR DTC P219A:00:
Wiring Diagram:
(A) = Install short cord
(B) = A/F Sensor (RH) terminals C and E
- Verify that DTC P219A:00 is stored in PCM memory.
- Record the customers preset radio stations.
- Remove the engine cover.
- Disconnect the negative battery cable.
- Remove the battery and battery tray.
- Remove the air cleaner element assembly.
- DTC P219A:00 only: Remove the resonance chamber (A) and dynamic chamber (B) according to MS3 online instructions or the Workshop Manual (section 01-13).
- Disconnect connector 0140-010B from the PCM.
- Remove the four (4) terminals (shown below) from connector 0140-010B.
NOTE: Refer to “How to remove terminals” below.
| No. | Terminal | Wire Color |
| 1 | 2BD | White/Blue |
| 2 | 2AS | Gray/Blue |
| 3 | 2AG | White/Red |
| 4 | 2AC | White/Green |
How to remove terminals:
- Lift up the lock cover (A) using a thin flat-blade screwdriver (B), then remove cover from connector.
- Release the lock lever (A) using the screwdriver (B), then pull the terminal (C) out of the connector.
- Install the four (4) terminals (shown below) from the short cord into the removed terminals from connector 0140-010B. Refer to the below table for terminal location and short cord wire colors.
| No. | Terminal | Wire Color | Short Cord Wire Color |
| 1 | 2BD | White/Blue | Brown/Blue |
| 2 | 2AS | Gray/Blue | White |
| 3 | 2AG | White/Red | Violet/Green |
| 4 | 2AC | White/Green | White/Green |
- Insert the lock cover over the connector, then push the cover down as shown below.
- Tape the remaining four (4) terminals of connector 0140-010B with electrical tape, then attach them to the harness as shown below.
- Route the short cord (A) as shown below.
- Disconnect the A/F connector 0140-24 (A), then (push) release the lock lever (B) to move from the harness.
- Remove terminals C (Green) and E (Green/Brown) from connector 0140-24.
How to remove terminals:
- Lift up the lock cover (A) using a thin flat-blade screwdriver, then remove cover from connector.
- Release the lock lever using the screwdriver, then pull the terminal out of the connector.
- Insert the removed terminals from connector 0140-24 into the short cord connector.
How to insert terminals into short cord connector:
- Lift up the short cord connector lock cover (A) half way.
- Insert the terminals (A) into the connector, then push the lock cover down.
- Connect the short cord connector to harness connector 0140-24.
- Cut off the original connector 0140-24, then discard it.
- Tape the ends of the remaining four (4) terminals (A) from the original connector 0140-24, then attach them to the harness using electrical tape as shown below. (B) = short cord connector location.
- PCM side:
- Starter motor side:
- On Engine:
- DTC P219A:00 only: Reinstall the resonance chamber (A) and dynamic chamber (B) according to MS3 online instructions or the Workshop Manual (section 01-13).
NOTE: Be sure to replace the three (3) dynamic chamber gaskets with new ones.
- Reinstall the air cleaner element assembly.
- Reinstall the battery and battery tray.
- Reconnect the negative battery cable.
- Reinstall the engine cover.
- Re-enter the customers preset radio stations.
REPAIR PROCEDURE FOR DTC P219B:00:
Wiring Diagram:
(A) = Install short cord
(B) = A/F Sensor (LH) terminals C and E
- Verify that DTC P219B:00 is stored in PCM memory.
- Record the customers preset radio stations.
- Remove the engine cover.
- Disconnect the negative battery cable.
- Remove the battery and battery tray.
- Remove the air cleaner element assembly.
- Disconnect connector 0140-010B from the PCM.
- Remove the four (4) terminals (shown below) from connector 0140-010B.
NOTE: Refer to “How to remove terminals” below.
| No. | Terminal Location | Wire Color |
| 1 | 2BF | Yellow/Violet |
| 2 | 2AO | Violet/Yellow |
| 3 | 2AK | White/Violet |
| 4 | 2AE | Violet/White |
How to remove terminals:
- Lift up the lock cover (A) using a thin flat-blade screwdriver (B), then remove cover from connector.
- Release the lock lever (A) using the screwdriver (B), then pull out the terminal (C) out of the connector.
9. Insert the four (4) terminals from the short cord into the removed terminals from connector 0140-010B. Refer to the below table for terminal location and short cord wire colors.
| No. | Terminal | Wire Color | Short Cord Wire Color |
| 1 | 2BF | Yellow/Violet | Brown/Blue |
| 2 | 2AO | Violet/Yellow | White |
| 3 | 2AK | White/Violet | Violet/Green |
| 4 | 2AE | Violet/White | White/Green |
- Insert the lock cover over the connector, then push the cover down as shown below.
- Tape the remaining four (4) terminals of connector 0140-010B with electrical tape, then attach them to the harness as shown below.
- Route the short cord (A) as shown below.
- Disconnect the A/F connector 0140-25 (A), then (push) release the lock lever (B) to move from the harness.
- Remove terminals C (Green) and E (Gray/Violet) from connector 0140-25.
How to remove terminals:
- Lift up the lock cover (A) using a thin flat-blade screwdriver, then remove cover from the connector.
- Release the lock lever using the screwdriver, then pull out the terminal out of the connector.
- Insert the removed terminals from connector 0140-25 into the short cord connector.
How to insert terminals into short cord connector:
- Lift up the short cord connector lock cover (A) half way.
- Insert the terminals (A) into the connector, then push the lock cover down.
- Connect the short cord connector to harness connector 0140-25.
- Cut off the original connector 0140-25, then discard it.
- Tape the ends of the remaining four (4) terminals (A) from the original connector 0140-25 and attach them to the harness using electrical tape as shown below. (B) = short cord connector location.
- PCM side:
- Starter motor side:
- On engine:
- Reinstall the air cleaner element assembly.
- Reinstall the battery and battery tray.
- Reconnect the negative battery cable.
- Reinstall the engine cover.
- Re-enter the customers preset radio stations.
PART(S) INFORMATION
| Part Number | Description | Qty. | Notes |
| TGY1-67-SH1 | Short Cord | 1 or 2 | For DTCs P219A:00 and/or P219B:00 |
CY01-13-135
Mazda Plenum Gasket - CY01-13-135
Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API | Gasket | 3 | Replacement parts for DTC P219A:00 repair only |
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Last update on 2026-06-01 / Affiliate links / Images from Amazon Product Advertising API
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