Throttle Actuation Potentiometer Signal Too High
2000-2004 Porsche Boxster 2.7L H6
Description
The ECU detected that the throttle actuation potentiometer signal voltage is higher than the maximum expected value. This may indicate an open ground circuit or sensor failure.
Symptoms
- Check Engine Light
- Limp mode with limited throttle
- Engine may idle only
- Erratic throttle response
Common Causes
- Open ground wire to throttle body
- Faulty throttle position potentiometer
- Connector pin backed out
- Throttle body internal fault
- ECU reference voltage issue
Diagnostic Steps
- Measure potentiometer signal voltage
- Check ground circuit continuity
- Inspect connector for backed-out pins
- Test reference voltage from ECU
- Compare both potentiometer readings
Repair Notes
Repair the open circuit or replace the throttle body assembly.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1544 on Other Vehicles
Porsche 718 Boxster
2017-2024 2.0L H4 Turbo
Porsche 718 Boxster
2017-2024 2.0L Turbo H4
Porsche 718 Boxster GTS
2020-2024 4.0L H6
Porsche 718 Boxster S
2017-2024 2.5L Turbo H4
Porsche 718 Cayman
2017-2024 2.0L H4 Turbo
Porsche 718 Cayman
2017-2024 2.0L Turbo H4
Porsche 718 Cayman GT4
2019-2024 4.0L H6
Porsche 718 Cayman GTS
2020-2024 4.0L H6
Common Questions
What does code P1544 mean on a 2000-2004 Porsche Boxster?
P1544 stands for "Throttle Actuation Potentiometer Signal Too High". The ECU detected that the throttle actuation potentiometer signal voltage is higher than the maximum expected value. This may indicate an open ground circuit or sensor failure.
What are the symptoms of P1544 on a Porsche Boxster?
Common symptoms of P1544 include: Check Engine Light, Limp mode with limited throttle, Engine may idle only, Erratic throttle response.
What causes P1544 on a 2000-2004 Porsche Boxster?
Common causes of P1544 include: Open ground wire to throttle body, Faulty throttle position potentiometer, Connector pin backed out, Throttle body internal fault, ECU reference voltage issue.