Code
P1153
DS
P — Powertrain
Motorised throttle position end stop programming
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EN: 0
RU: 0
AI status
Completed
Completed
100%
Causes
- Throttle body end-stop (closed position) not learned or adaptation data lost
- Interruption during throttle adaptation procedure (battery disconnected, diagnostic tool removed)
- Faulty throttle body (motor/actuator or internal position sensor)
- Corroded/broken wiring or poor electrical connection to throttle actuator or sensors
- Heavy carbon build-up or mechanical obstruction preventing full travel
- Low battery/unstable supply voltage during learning procedure
Symptoms
- Malfunction Indicator Lamp (MIL) or engine warning light illuminated
- Reduced engine power or limp-home mode
- Unstable idle or high/low idle after start
- Poor throttle response or hesitations when accelerating
- Possible throttle surging or unexpected engine speed changes
- After battery disconnect or throttle service, vehicle will not return to normal until adaptation is performed
What to check
- Read and record freeze frame data and full DTC list; confirm P1153 is present and note any related codes
- Check vehicle battery voltage (should be >12.4 V) and charging system before performing adaptations
- Inspect throttle body connector and wiring harness for damage, corrosion, or loose pins
- Scan live data: throttle position sensors (TPS 1 & TPS 2), pedal position sensor(s), and throttle actuator command/actual position
- Manually check throttle plate movement (with ignition off) for mechanical restriction or carbon build-up
- Verify throttle body returns to closed position and that sensors move smoothly without intermittent spikes
Signal parameters
- Closed throttle position (TPS) typical voltage: approximately 0.3–1.0 V (varies by manufacturer — consult DS data)
- Wide open throttle TPS typical voltage: approximately 4.0–4.8 V
- TPS 1 and TPS 2 should correlate linearly; mismatch or stuck value indicates sensor/actuator issue
- Throttle actuator command vs actual position should follow; large discrepancy indicates actuator or learning fault
- Battery voltage should remain above ~12.4 V during learn procedure
Diagnostic algorithm
- Read and record all DTCs and freeze frame data. Note any related throttle/pedal codes.
- Check battery state of charge and charging system. Recharge or replace battery if low.
- Visually inspect throttle body electrical connector and wiring. Repair any damage or corrosion.
- Check throttle plate for carbon deposits or mechanical obstruction. Clean throttle body if necessary using manufacturer-approved procedure.
- Using a diagnostic scan tool with DS/PSA functions, attempt the prescribed throttle end-stop/idle adaptation procedure. Follow the tool prompts exactly and ensure stable battery voltage.
- While performing adaptation, monitor live TPS1/TPS2 and actuator position values for smooth movement and correct correlation.
- If adaptation fails and wiring/power are good, test or replace the throttle body/actuator assembly per manufacturer guidance.
- After repairs or replacement, repeat the adaptation procedure, clear codes, and verify no reoccurrence during test drive.
- If failures persist after new throttle body and correct adaptation, consider PCM software update or replacement as directed by service information.
Likely causes
- Throttle body adaptation data erased after battery replacement or ECM reflash and not re-learned
- Throttle actuator motor or internal position sensor failing or noisy
- Poor power or ground to throttle module (loose connector, corroded pin)
- Carbon deposits restricting throttle plate movement
- Interrupted learning cycle due to low battery voltage or removal of scan tool
Fault status
Status
Throttle end-stop programming fault — adaptation not learned or adaptation failed. Check throttle actuator, sensors, wiring and perform end-stop learning with diagnostic tool.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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