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
To eliminate this concern, the emissions harness has been improved.
REPAIR PROCEDURE
- 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:
- Original Emissions Harness: Cut the original harness 50 mm from the end of the connector (A).
- Strip 20 mm of insulation from the end of the wire (B).
- New (Modified) Emissions Harness: Cut off the existing connector (A) near the “S” terminal (B).
NOTE: Discard the connector.
- Solder the connector wire from the original emissions harness (A) to the wire from the new modified emissions harness (B) as shown below.
- 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).
- After completing harness replacement, clear the DTCs.
PART(S) INFORMATION
| Part Number | Description | Qty. | Notes |
| TG20-67-020C | Emissions Harness | 1 | — |
- General purpose electrical tape for long-lasting applications
- Meets and conforms to UL and CSA building codes
- Abrasion-resistant backing for durable coverage
- 7 mils vinyl tape
- Excellent stretch, adhesion and conformability
Last update on 2026-06-16 / Affiliate links / Images from Amazon Product Advertising API
- PRIMARY ELECTRICAL INSULATION for all wire and cable splices rated up to 600 volts
- PROTECTIVE JACKETING for high-voltage cable splices and repairs
- BUNDLE & REPAIR; harness wires and cables
- INDOOR AND OUTDOOR USE; above- or below-ground applications
- HIGH ADHESION in wide range of temperatures: 0°C (32°F)–80°C (176°F)
Last update on 2026-06-16 / Affiliate links / Images from Amazon Product Advertising API
- 7 mil vinyl tape in a canister for easy storage
- Abrasion-resistant backing to keep wires well insulated
- Meets and conforms to UI and CSA building codes
- Rated for use up to 600 volts and between 14-Degree F and 176-Degree F, performs down to -10 degrees Celsius
- Vinyl tape for all-weather durability
Last update on 2026-06-16 / Affiliate links / Images from Amazon Product Advertising API
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