Smart Roadster Power Loss + CEL Points to Temp Sensor

Had the same issue on a 2002 Smart City-Coupe. The symptoms match exactly what I experienced, reduced power, whistling noise, and check engine light. The charge sensor and temperature sensor assembly needed replacement after the wiring harness showed significant wear. The diagnosis revealed damaged connectors where the charge air temperature sensor connects to the air intake system. What initially seemed like a simple sensor issue turned out to be more complex, as the faulty connection was causing incorrect readings and making the engine run in safety mode. The repair involved: Testing the airflow sensor functionality, Replacing the temperature gauge assembly, Installing new wiring connectors, Recalibrating the engine management system This was a serious repair that required specialized diagnostic equipment. Just replacing the sensor without addressing the wiring would have only temporarily fixed the issue. The temperature sensor plays a crucial role in engine management, and incorrect readings can cause lasting damage if not addressed properly. Consider having the complete sensor assembly and wiring checked rather than just replacing individual components.

Had the same issue on a 2002 Smart City-Coupe. The symptoms match exactly what I experienced, reduced power, whistling noise, and check engine light. The charge sensor and temperature sensor assembly needed replacement after the wiring harness showed significant wear. The diagnosis revealed damaged connectors where the charge air temperature sensor connects to the air intake system. What initially seemed like a simple sensor issue turned out to be more complex, as the faulty connection was causing incorrect readings and making the engine run in safety mode. The repair involved: Testing the airflow sensor functionality, Replacing the temperature gauge assembly, Installing new wiring connectors, Recalibrating the engine management system This was a serious repair that required specialized diagnostic equipment. Just replacing the sensor without addressing the wiring would have only temporarily fixed the issue. The temperature sensor plays a crucial role in engine management, and incorrect readings can cause lasting damage if not addressed properly. Consider having the complete sensor assembly and wiring checked rather than just replacing individual components.

Had the same issue on a 2002 Smart City-Coupe. The symptoms match exactly what I experienced, reduced power, whistling noise, and check engine light. The charge sensor and temperature sensor assembly needed replacement after the wiring harness showed significant wear. The diagnosis revealed damaged connectors where the charge air temperature sensor connects to the air intake system. What initially seemed like a simple sensor issue turned out to be more complex, as the faulty connection was causing incorrect readings and making the engine run in safety mode. The repair involved: Testing the airflow sensor functionality, Replacing the temperature gauge assembly, Installing new wiring connectors, Recalibrating the engine management system This was a serious repair that required specialized diagnostic equipment. Just replacing the sensor without addressing the wiring would have only temporarily fixed the issue. The temperature sensor plays a crucial role in engine management, and incorrect readings can cause lasting damage if not addressed properly. Consider having the complete sensor assembly and wiring checked rather than just replacing individual components.

Had the same issue on a 2002 Smart City-Coupe. The symptoms match exactly what I experienced, reduced power, whistling noise, and check engine light. The charge sensor and temperature sensor assembly needed replacement after the wiring harness showed significant wear. The diagnosis revealed damaged connectors where the charge air temperature sensor connects to the air intake system. What initially seemed like a simple sensor issue turned out to be more complex, as the faulty connection was causing incorrect readings and making the engine run in safety mode. The repair involved: Testing the airflow sensor functionality, Replacing the temperature gauge assembly, Installing new wiring connectors, Recalibrating the engine management system This was a serious repair that required specialized diagnostic equipment. Just replacing the sensor without addressing the wiring would have only temporarily fixed the issue. The temperature sensor plays a crucial role in engine management, and incorrect readings can cause lasting damage if not addressed properly. Consider having the complete sensor assembly and wiring checked rather than just replacing individual components.

Had the same issue on a 2002 Smart City-Coupe. The symptoms match exactly what I experienced, reduced power, whistling noise, and check engine light. The charge sensor and temperature sensor assembly needed replacement after the wiring harness showed significant wear. The diagnosis revealed damaged connectors where the charge air temperature sensor connects to the air intake system. What initially seemed like a simple sensor issue turned out to be more complex, as the faulty connection was causing incorrect readings and making the engine run in safety mode. The repair involved: Testing the airflow sensor functionality, Replacing the temperature gauge assembly, Installing new wiring connectors, Recalibrating the engine management system This was a serious repair that required specialized diagnostic equipment. Just replacing the sensor without addressing the wiring would have only temporarily fixed the issue. The temperature sensor plays a crucial role in engine management, and incorrect readings can cause lasting damage if not addressed properly. Consider having the complete sensor assembly and wiring checked rather than just replacing individual components.

Thanks for sharing your experience with the charge sensor repair. The symptoms you described match my issue perfectly. The automotive sensor diagnostics seem quite involved. Did you remember roughly how much this repair ended up costing? Also curious if you had any other temperature gauge or engine management issues since getting it fixed?

Thanks for sharing your experience with the charge sensor repair. The symptoms you described match my issue perfectly. The automotive sensor diagnostics seem quite involved. Did you remember roughly how much this repair ended up costing? Also curious if you had any other temperature gauge or engine management issues since getting it fixed?

Thanks for sharing your experience with the charge sensor repair. The symptoms you described match my issue perfectly. The automotive sensor diagnostics seem quite involved. Did you remember roughly how much this repair ended up costing? Also curious if you had any other temperature gauge or engine management issues since getting it fixed?

Thanks for sharing your experience with the charge sensor repair. The symptoms you described match my issue perfectly. The automotive sensor diagnostics seem quite involved. Did you remember roughly how much this repair ended up costing? Also curious if you had any other temperature gauge or engine management issues since getting it fixed?

Thanks for sharing your experience with the charge sensor repair. The symptoms you described match my issue perfectly. The automotive sensor diagnostics seem quite involved. Did you remember roughly how much this repair ended up costing? Also curious if you had any other temperature gauge or engine management issues since getting it fixed?

Glad to update on my Smart City-Coupe sensor repair experience. The charge air temperature sensor issue was completely resolved after fixing a faulty cable connection, much simpler than my initial repair actually turned out to be. The fix cost 95€, which covered diagnosing and repairing the defective plug connection. Since addressing the automotive sensor problem, the engine has run perfectly with no temperature gauge issues or engine management problems. The whistling noise disappeared completely, and power returned to normal once the charge sensor was reading correctly again. The airflow sensor diagnostic actually showed all other components were working fine, it was purely the connection that needed attention. This proves the importance of proper diagnostics before replacing parts unnecessarily. My earlier concerns about extensive repairs turned out to be overcautious. Sometimes these engine sensor issues have simple solutions if diagnosed correctly.

Glad to update on my Smart City-Coupe sensor repair experience. The charge air temperature sensor issue was completely resolved after fixing a faulty cable connection, much simpler than my initial repair actually turned out to be. The fix cost 95€, which covered diagnosing and repairing the defective plug connection. Since addressing the automotive sensor problem, the engine has run perfectly with no temperature gauge issues or engine management problems. The whistling noise disappeared completely, and power returned to normal once the charge sensor was reading correctly again. The airflow sensor diagnostic actually showed all other components were working fine, it was purely the connection that needed attention. This proves the importance of proper diagnostics before replacing parts unnecessarily. My earlier concerns about extensive repairs turned out to be overcautious. Sometimes these engine sensor issues have simple solutions if diagnosed correctly.

Glad to update on my Smart City-Coupe sensor repair experience. The charge air temperature sensor issue was completely resolved after fixing a faulty cable connection, much simpler than my initial repair actually turned out to be. The fix cost 95€, which covered diagnosing and repairing the defective plug connection. Since addressing the automotive sensor problem, the engine has run perfectly with no temperature gauge issues or engine management problems. The whistling noise disappeared completely, and power returned to normal once the charge sensor was reading correctly again. The airflow sensor diagnostic actually showed all other components were working fine, it was purely the connection that needed attention. This proves the importance of proper diagnostics before replacing parts unnecessarily. My earlier concerns about extensive repairs turned out to be overcautious. Sometimes these engine sensor issues have simple solutions if diagnosed correctly.

Glad to update on my Smart City-Coupe sensor repair experience. The charge air temperature sensor issue was completely resolved after fixing a faulty cable connection, much simpler than my initial repair actually turned out to be. The fix cost 95€, which covered diagnosing and repairing the defective plug connection. Since addressing the automotive sensor problem, the engine has run perfectly with no temperature gauge issues or engine management problems. The whistling noise disappeared completely, and power returned to normal once the charge sensor was reading correctly again. The airflow sensor diagnostic actually showed all other components were working fine, it was purely the connection that needed attention. This proves the importance of proper diagnostics before replacing parts unnecessarily. My earlier concerns about extensive repairs turned out to be overcautious. Sometimes these engine sensor issues have simple solutions if diagnosed correctly.

Glad to update on my Smart City-Coupe sensor repair experience. The charge air temperature sensor issue was completely resolved after fixing a faulty cable connection, much simpler than my initial repair actually turned out to be. The fix cost 95€, which covered diagnosing and repairing the defective plug connection. Since addressing the automotive sensor problem, the engine has run perfectly with no temperature gauge issues or engine management problems. The whistling noise disappeared completely, and power returned to normal once the charge sensor was reading correctly again. The airflow sensor diagnostic actually showed all other components were working fine, it was purely the connection that needed attention. This proves the importance of proper diagnostics before replacing parts unnecessarily. My earlier concerns about extensive repairs turned out to be overcautious. Sometimes these engine sensor issues have simple solutions if diagnosed correctly.

Thanks everyone for the helpful replies. I wanted to share how my repair turned out. After checking the connections and wiring to the charge sensor myself, I took it to a specialist garage for proper diagnosis. The mechanic found the temperature sensor had a broken connector pin, causing intermittent readings. The total repair was 180€ which covered: Complete diagnostic scan, Cleaning the airflow sensor assembly, Replacing the faulty temperature gauge connector, Labor costs The automotive sensor repair was much simpler than expected. The whistling noise is completely gone, engine power is back to normal, and no check engine light. The temperature readings are now stable and accurate. Really glad I asked here first, saved me from unnecessarily replacing multiple parts. The mechanic confirmed just fixing the connector was the right approach rather than changing the entire sensor assembly.

Thanks everyone for the helpful replies. I wanted to share how my repair turned out. After checking the connections and wiring to the charge sensor myself, I took it to a specialist garage for proper diagnosis. The mechanic found the temperature sensor had a broken connector pin, causing intermittent readings. The total repair was 180€ which covered: Complete diagnostic scan, Cleaning the airflow sensor assembly, Replacing the faulty temperature gauge connector, Labor costs The automotive sensor repair was much simpler than expected. The whistling noise is completely gone, engine power is back to normal, and no check engine light. The temperature readings are now stable and accurate. Really glad I asked here first, saved me from unnecessarily replacing multiple parts. The mechanic confirmed just fixing the connector was the right approach rather than changing the entire sensor assembly.

Thanks everyone for the helpful replies. I wanted to share how my repair turned out. After checking the connections and wiring to the charge sensor myself, I took it to a specialist garage for proper diagnosis. The mechanic found the temperature sensor had a broken connector pin, causing intermittent readings. The total repair was 180€ which covered: Complete diagnostic scan, Cleaning the airflow sensor assembly, Replacing the faulty temperature gauge connector, Labor costs The automotive sensor repair was much simpler than expected. The whistling noise is completely gone, engine power is back to normal, and no check engine light. The temperature readings are now stable and accurate. Really glad I asked here first, saved me from unnecessarily replacing multiple parts. The mechanic confirmed just fixing the connector was the right approach rather than changing the entire sensor assembly.

Thanks everyone for the helpful replies. I wanted to share how my repair turned out. After checking the connections and wiring to the charge sensor myself, I took it to a specialist garage for proper diagnosis. The mechanic found the temperature sensor had a broken connector pin, causing intermittent readings. The total repair was 180€ which covered: Complete diagnostic scan, Cleaning the airflow sensor assembly, Replacing the faulty temperature gauge connector, Labor costs The automotive sensor repair was much simpler than expected. The whistling noise is completely gone, engine power is back to normal, and no check engine light. The temperature readings are now stable and accurate. Really glad I asked here first, saved me from unnecessarily replacing multiple parts. The mechanic confirmed just fixing the connector was the right approach rather than changing the entire sensor assembly.

Thanks everyone for the helpful replies. I wanted to share how my repair turned out. After checking the connections and wiring to the charge sensor myself, I took it to a specialist garage for proper diagnosis. The mechanic found the temperature sensor had a broken connector pin, causing intermittent readings. The total repair was 180€ which covered: Complete diagnostic scan, Cleaning the airflow sensor assembly, Replacing the faulty temperature gauge connector, Labor costs The automotive sensor repair was much simpler than expected. The whistling noise is completely gone, engine power is back to normal, and no check engine light. The temperature readings are now stable and accurate. Really glad I asked here first, saved me from unnecessarily replacing multiple parts. The mechanic confirmed just fixing the connector was the right approach rather than changing the entire sensor assembly.