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2013 Hyundai Elantra GLS 1.8L - Troubleshooting P0030, P0135, and P2118 OBD2 Fault Codes

Model: Elantra Fault Code: P0030 Posted: 2016-07-11 23:38

I'm experiencing three OBD2 fault codes on my 2013 Hyundai Elantra GLS with a 1.8L engine: P0030, P0135, and P2118. I already understand what P0135 (O2 Sensor Heater Circuit Malfunction - Bank 1 Sensor 1) means, but I need help diagnosing the other two codes. P0030 refers to the HO2S Heater Control Circuit (Bank 1 Sensor 1), which indicates a potential issue with the heater circuit of the upstream oxygen sensor. P2118 relates to the Throttle Actuator Control Motor Current Range/Performance, suggesting possible problems in throttle actuation or related electrical circuits. I've already cleaned the throttle body (TB) and checked fuses and wiring connectors. However, I still experience rough idle and delayed acceleration—especially under highway driving conditions. I'm looking for guidance on next steps to resolve these issues.

Related fault codes
P0030P0135P2118
Comments (5)
Anonymous 2016-07-12 07:49

P2118 - Throttle Actuator Control Motor Current Range/Performance Start by cleaning the throttle body (TB) using a dedicated TB cleaner—avoid oil-based filters. First, verify the circuit integrity: check fuses and wiring connectors. Key keywords include 'CIRCUIT', 'wiring diagram E', and 'connector'. P0030: HO2S Heater Control Circuit (Bank 1 Sensor 1) P0135: O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1) If replacement sensors are needed, use OEM Hyundai parts for optimal compatibility and performance.

Anonymous 2016-07-14 10:24

I replaced both upstream and downstream oxygen sensors. Could you clarify what 'TB' refers to and which specific fuse or connector I should inspect first?

Anonymous 2016-07-14 10:48

TB stands for Throttle Body. Use a dedicated throttle body cleaner, available at most auto parts stores. Follow the wiring diagram labeled E in the attached resource: http://www.revbase.com/BBBMotor/Wd/Down...id=1028402. Ensure you are using genuine Hyundai replacement parts to maintain system compatibility and avoid further diagnostic errors.

Anonymous 2016-07-15 02:47

Yes, I cleaned the throttle body, checked all fuses and connectors related to the TB, but the vehicle still has a rough idle and delayed acceleration—especially when driving on highways. I'm now at a loss as to what else might be causing this issue.

Anonymous 2016-07-16 21:17

Could the throttle position sensor (TPS) be the root cause of the P2118 fault code? It's possible that a faulty TPS could affect throttle actuation and contribute to performance issues like delayed acceleration or rough idle.