The Honda 11-02 diagnostic trouble code (DTC) indicates an IG1 Power Line Failure, typically related to the Electronic Power Steering (EPS) system. This article documents a personal troubleshooting experience with this code on a Honda vehicle.
Initial Diagnosis and Dealer Visit
The initial symptom was an intermittent power steering issue. A code reader confirmed the presence of the 11-02 DTC. All visible wiring to the EPS module appeared to be in good condition. A visit to a Honda dealership resulted in the code being cleared and the steering wheel angle calibrated. This temporarily resolved the issue and the code did not immediately reappear.
Persistent Steering Problems
Despite clearing the 11-02 code, intermittent power steering problems persisted. The steering wheel felt stiff and exhibited unusual behavior. Online consultations with another mechanic suggested a potentially faulty EPS module, even in the absence of a recurring DTC.
Unexpected Resolution: MAF Sensor
After two months of intermittent steering issues, the problem was ultimately traced to a dirty Mass Air Flow (MAF) sensor. Cleaning the MAF sensor with compressed air and cleaning the air intake completely resolved the steering problems. While the connection between the MAF sensor and the EPS system isn’t entirely clear, it’s speculated that the dirty MAF sensor negatively impacted the vehicle’s overall performance, including the ABS system, which might have indirectly affected the steering feel.
Conclusion
While the Honda 11-02 code directly points to the EPS system, this experience highlights the importance of considering other potential causes when troubleshooting automotive issues. A dirty MAF sensor, in this instance, was the unexpected culprit behind the intermittent power steering problems. This case study underscores the value of thorough diagnostics and exploring less obvious solutions.
