Lack of Power, Wrench Light Comes on with DTCs P0123 / P0222 – 2011-2013 Mazda CX-9

2011-2013 CX-9 – LACK OF POWER / WRENCH LIGHT ON / CHECK ENGINE LIGHT ON WITH DTCs P0123 / P0222

APPLICABLE MODEL(S)/VINS

2011-2013 CX-9 with VINs lower than JM3TB******419830 (produced May 1, 2013)

 

Lack of power and the wrench light comes on with DTCs P0123 / P0222 stored in memory.

 

Wrench Light: Powertrain Malfunction / Reduced Power Warning Light

• DTC: P0123:00 TP sensor No.1 circuit high input.
• DTC: P0222:00 TP sensor No. 2 circuit low input.

To eliminate this concern, the emissions harness has been improved.

 

REPAIR PROCEDURE

1. Inspect the following according to the instructions on MS3 online or the Workshop Manual (section 01-02).

DTC: P0123:00 TP Sensor No. 1 Circuit High Input.

The TP sensor No.1 circuit was flagged as a concern by the PCM indicating a high voltage.

• Connector or terminal malfunction.
• Short to constant voltage supply circuit between throttle body terminal F and PCM terminal 2AN.
• TP sensor signal circuits are shorting each other.
• TP sensor No.1 malfunction.

DTC: P0222:00 TP Sensor No. 2 Circuit Low Input.

The TP sensor No. 2 circuit was flagged as a concern by the PCM indicating a low voltage or open circuit.

• Connector or terminal malfunction.
• Short to ground circuit between throttle body terminal C and PCM terminal 2AL.
• Open circuit between throttle body terminal C (E) and PCM terminal 2AL (2Z).
• TP sensor No. 2 malfunction.

If no trouble is found during the inspection above, replace the emissions harness (A) with a modified part.

 

Emissions Harness Modification (2011 CX-9 Only):

Since the shape of the “S” (starter) terminal in the 2011 CX-9 is different than later models, the new (modified) emissions harness (p/n: TG20-67-020C) cannot be used as is. It must be modified.

Follow the steps below to modify the new harness using the connector for the “S” terminal from the original harness:

1. Original Emissions Harness: Cut the original harness 50 mm from the end of the connector (A).
2. Strip 20 mm of insulation from the end of the wire (B).

3. New (Modified) Emissions Harness: Cut off the existing connector (A) near the “S” terminal (B).

NOTE: Discard the connector.

4. Solder the connector wire from the original emissions harness (A) to the wire from the new modified emissions harness (B) as shown below.

5. Insulate the soldered wires with butyl tape, then again with electrical tape (over the butyl tape).

NOTE: For additional information, refer to MS3 online (section 00-00).

6. After completing harness replacement, clear the DTCs.

 

PART(S) INFORMATION

Part Number	Description	Qty.	Notes
TG20-67-020C	Emissions Harness	1	—