P1601
PPowertrainThrottle Control Unit Throttle Position Fault
What does this code mean?
Severity : HighP1601 is a manufacturer specific code. In the definition used here, it reports a throttle position fault detected by the throttle control unit. The exact meaning depends on the manufacturer: on many brands P1601 refers to a module communication or supply fault. A throttle fault often triggers limp mode.
Symptoms
- Check engine light on.
- Limp mode with limited power.
- Unstable idle or engine speed stuck.
- Weak or no throttle response.
Possible causes
- Dirty or sticking throttle body.
- Faulty throttle position sensor.
- Damaged throttle connector or wiring.
- Faulty power or ground to the control unit.
- Engine control module fault.
Diagnosis and repair
- Confirm what this code means for your make.
- Inspect the throttle body, its connector and wiring.
- Compare position signals in live data.
- Clean the throttle and run a relearn, or replace it if needed.
- Clear the code and road test.
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Code
P1601
Category
Powertrain
Prefix
P
Standard
OBD-II / SAE J2012