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Home / DTC / P2101 — Accelerator Pedal Position (APP) assembly failure, Powertrain Control Module (PCM) failure, Throttle control motor failure, Wiring issue

P2101 — Accelerator Pedal Position (APP) assembly failure, Powertrain Control Module (PCM) failure, Throttle control motor failure, Wiring issue

Detailed page for trouble code P2101.

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Code

P2101

AUDI P — Powertrain

Accelerator Pedal Position (APP) assembly failure, Powertrain Control Module (PCM) failure, Throttle control motor failure, Wiring issue

Brand: AUDI
Type: P — Powertrain
Views: UK: 23 EN: 59 RU: 38
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Accelerator Pedal Position (APP) sensor assembly failure
  • Throttle body / throttle control motor failure
  • Powertrain Control Module (PCM) internal fault
  • Open, shorted, damaged, or corroded wiring and connectors in APP/throttle circuits
  • Poor ground or 5V reference supply failure
  • Software or calibration issue between APP and throttle control

Symptoms

  • MIL illuminated and P2101 logged
  • Reduced engine power / limp-home mode
  • Poor or delayed throttle response
  • Cruise control disabled
  • Possible rough idle, stalling, or inability to accelerate normally
  • Intermittent or permanent loss of driveability

What to check

  • Retrieve all stored codes and freeze frame data with a capable scan tool
  • Inspect APP and throttle body connectors for corrosion, bent pins, water intrusion and secure fit
  • Visually inspect wiring harness along pedal to firewall and engine bay for damage or chafing
  • Check 5V reference and ground at APP and throttle body with key ON (back-probe)
  • Back-probe APP signal pins while operating pedal; verify sensor voltages change smoothly and correlate between redundant sensors
  • Command throttle actuator using scan tool actuator test and observe response

Signal parameters

  • APP sensors: typically two redundant signals; voltages roughly 0.5–4.5 V that change smoothly and correlate to pedal travel
  • 5V reference present at sensor supply pin (approx. 5.0 V) and good ground
  • Throttle position sensor: correlated change in signal voltage as throttle is commanded
  • Throttle actuator: PWM duty cycle 0–100% or specific frequency (varies by model) when commanded by PCM
  • Resistance or continuity: no short to ground or battery on signal lines; typical sensor input impedance per service data

Diagnostic algorithm

  1. Read and record all DTCs, freeze frame and live data for APP channels, throttle position, and actuator status.
  2. Observe live APP sensor voltages (both channels) while slowly pressing and releasing pedal. Verify both signals change smoothly without dropouts and have expected correlation.
  3. Verify 5V reference and ground at APP connector. Repair any missing reference or poor ground before further testing.
  4. Inspect wiring harness from pedal to PCM and throttle body to PCM for damage, corrosion, or pin issues. Wiggle test while monitoring signals for intermittent faults.
  5. Back-probe throttle body connector and command throttle actuator using scan tool. Confirm throttle plate moves and feedback position matches commanded value.
  6. If actuator does not respond, check power/ground to actuator and measure actuator driver signals from PCM. If driver signals absent or abnormal, suspect PCM or wiring to PCM.
  7. If APP signals are out-of-range or noisy, bench-test or swap pedal assembly (if available) to confirm. Replace APP if confirmed faulty.
  8. If actuator is mechanically seized or motor fails, replace throttle body assembly and perform required adaptations/relearn.
  9. If wiring and components test OK, consider PCM failure or software/calibration issue. Check for ECU updates and perform PCM tests per manufacturer procedures; replace PCM only if supported by diagnostics.
  10. After repairs, clear codes, perform throttle/APP relearn as required, and verify driveability and that DTC does not return.

Likely causes

  • Corroded or loose connector at the APP or throttle body
  • Broken or chafed wiring between APP and PCM or PCM and throttle actuator
  • Failed APP potentiometer or Hall-effect sensors (loss of signal or out-of-range readings)
  • Throttle actuator motor worn or mechanically stuck
  • PCM driver for throttle actuator degraded or failed
  • Recent work or water intrusion at pedal/throttle wiring causing damage

Fault status

⚠️ Status
P2101 — Accelerator Pedal Position/throttle control circuit fault. Indicates APP assembly, throttle actuator, wiring/connectors, or PCM issue causing out-of-range or failed signals; vehicle may enter limp mode and set MIL.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P2100 P2102 P2122 P2123 P2135 P2119
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Code

P2101

Generic P — Powertrain

Throttle Actuator A Control Motor Circuit Range/Performance

Brand: Generic
Type: P — Powertrain
Views: UK: 22 EN: 59 RU: 34
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Accelerator Pedal Position (APP) sensor assembly failure
  • Throttle body / throttle control motor failure
  • Powertrain Control Module (PCM) internal fault
  • Open, shorted, damaged, or corroded wiring and connectors in APP/throttle circuits
  • Poor ground or 5V reference supply failure
  • Software or calibration issue between APP and throttle control

Symptoms

  • MIL illuminated and P2101 logged
  • Reduced engine power / limp-home mode
  • Poor or delayed throttle response
  • Cruise control disabled
  • Possible rough idle, stalling, or inability to accelerate normally
  • Intermittent or permanent loss of driveability

What to check

  • Retrieve all stored codes and freeze frame data with a capable scan tool
  • Inspect APP and throttle body connectors for corrosion, bent pins, water intrusion and secure fit
  • Visually inspect wiring harness along pedal to firewall and engine bay for damage or chafing
  • Check 5V reference and ground at APP and throttle body with key ON (back-probe)
  • Back-probe APP signal pins while operating pedal; verify sensor voltages change smoothly and correlate between redundant sensors
  • Command throttle actuator using scan tool actuator test and observe response

Signal parameters

  • APP sensors: typically two redundant signals; voltages roughly 0.5–4.5 V that change smoothly and correlate to pedal travel
  • 5V reference present at sensor supply pin (approx. 5.0 V) and good ground
  • Throttle position sensor: correlated change in signal voltage as throttle is commanded
  • Throttle actuator: PWM duty cycle 0–100% or specific frequency (varies by model) when commanded by PCM
  • Resistance or continuity: no short to ground or battery on signal lines; typical sensor input impedance per service data

Diagnostic algorithm

  1. Read and record all DTCs, freeze frame and live data for APP channels, throttle position, and actuator status.
  2. Observe live APP sensor voltages (both channels) while slowly pressing and releasing pedal. Verify both signals change smoothly without dropouts and have expected correlation.
  3. Verify 5V reference and ground at APP connector. Repair any missing reference or poor ground before further testing.
  4. Inspect wiring harness from pedal to PCM and throttle body to PCM for damage, corrosion, or pin issues. Wiggle test while monitoring signals for intermittent faults.
  5. Back-probe throttle body connector and command throttle actuator using scan tool. Confirm throttle plate moves and feedback position matches commanded value.
  6. If actuator does not respond, check power/ground to actuator and measure actuator driver signals from PCM. If driver signals absent or abnormal, suspect PCM or wiring to PCM.
  7. If APP signals are out-of-range or noisy, bench-test or swap pedal assembly (if available) to confirm. Replace APP if confirmed faulty.
  8. If actuator is mechanically seized or motor fails, replace throttle body assembly and perform required adaptations/relearn.
  9. If wiring and components test OK, consider PCM failure or software/calibration issue. Check for ECU updates and perform PCM tests per manufacturer procedures; replace PCM only if supported by diagnostics.
  10. After repairs, clear codes, perform throttle/APP relearn as required, and verify driveability and that DTC does not return.

Likely causes

  • Corroded or loose connector at the APP or throttle body
  • Broken or chafed wiring between APP and PCM or PCM and throttle actuator
  • Failed APP potentiometer or Hall-effect sensors (loss of signal or out-of-range readings)
  • Throttle actuator motor worn or mechanically stuck
  • PCM driver for throttle actuator degraded or failed
  • Recent work or water intrusion at pedal/throttle wiring causing damage

Fault status

⚠️ Status
P2101 — Accelerator Pedal Position/throttle control circuit fault. Indicates APP assembly, throttle actuator, wiring/connectors, or PCM issue causing out-of-range or failed signals; vehicle may enter limp mode and set MIL.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P2100 P2102 P2122 P2123 P2135 P2119
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  • 1 Engine number
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Key sections:
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Workshop Manual
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Short description

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  • 2 Injection system
  • 2.1 Technical data
  • 2.2 Overview of fitting locations - injection system
  • 3 Intake manifold
  • 3.1 Exploded view - intake manifold
  • 3.2 Removing and installing intake manifold
Buy

Audi A8 (2003) — Electrical System Workshop Manual (Edition 08.2014)

Workshop Manual
Years: 2003 Manual in English Pages: 369 9.1 MB
Short description

Comprehensive workshop manual for the Audi A8 (2003) electrical system — Edition 08.2014. Covers battery, alternator, starter, instrument cluster, wiper/washer systems, exterior/interior lighting and wiring repair procedures with step-by-step illustrations. Includes diagnostic and adjustment procedures and torque/data specifications.

199,00 UAH
Contents
Key sections:
  • 27 - Starter, current supply, CCS
  • 1 Contact corrosion
  • 2 Battery
  • 2.1 Battery - general notes
  • 2.2 Maintenance-free batteries
  • 2.3 Disconnecting and connecting battery
  • 2.4 Removing and installing battery
  • - Remove luggage compartment side trim (right-side)
  • - Connect battery charger for back-up power
  • - Detach earth and positive cables, central venting hose
  • - Remove battery retainer plate and lift battery out
  • - Installation notes, adaptation via Vehicle diagnostic tester
Buy

Audi Q4 e-tron (Type F4) - Self-study Programme SSP 685

Workshop Manual
Years: 2021 Manual in English Pages: 186 82.7 MB
Short description

Official Audi Service Training self‑study programme SSP 685 for the Audi Q4 e‑tron (Type F4). Covers body, power units, power transmission, running gear, electrics & electronics, high‑voltage system, thermal management, driver assist and infotainment. Intended for internal service training and technical familiarisation; not a workshop repair manual.

199,00 UAH
Contents
Key sections:
  • Introduction
  • - Introduction to Audi Q4 e-tron
  • - Dimensions
  • Body
  • - Body structure and materials
  • - Joining techniques
  • - Securing high-voltage battery and force progression
  • - Body assembly (doors, rear lid, panoramic sunroof)
  • - Dash panel and centre console
  • Power units
  • - Technical data: rear electric motor (VX90)
  • - Technical data: front electric motor (VX89)
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Audi Q8 (2018) — Electrical System Workshop Manual (Edition 05.2019)

Workshop Manual
Years: 2018 Manual in English Pages: 645 14.8 MB
Short description

Workshop manual for the Audi Q8 (2018) — Electrical System. Includes technical data, safety notes and step‑by‑step repair procedures for battery/charging, starter/alternator, lighting, washer/wiper and wiring. Edition 05.2019.

199,00 UAH
Contents
Key sections:
  • 00 - Technical data
  • 1 Safety precautions
  • 1.1 Safety precautions when working on vehicles with start/stop system
  • 1.2 Safety precautions when using testers and measuring instruments during a road test
  • 1.3 Notes on use and safety for LED headlights and Audi laser lights
  • 2 Repair notes
  • 2.1 Rules for cleanliness
  • 2.2 General notes
  • 2.3 Contact corrosion
  • 2.4 ESD (electrostatic discharge) workplace
  • 2.5 Routing and attachment of lines and wiring
  • 2.6 Identification plates
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Audi Servicing Manual — 7‑Speed Dual Clutch Transmission 0CJ / 0CL / 0CK / 0DN / 0DP / 0HL (Edition 05.2018)

Workshop Manual
Years: 2008–2019 Manual in English Pages: 128 11.1 MB
Short description

Service manual for the 7‑Speed dual‑clutch (DSG) transmissions 0CJ/0CL/0CK/0DN/0DP/0HL fitted to various Audi models. Includes repair information, clutch and gearbox disassembly/assembly, mechatronic and hydraulic system procedures, seals and differential work. Edition 05.2018.

199,00 UAH
Contents
Key sections:
  • 00 - General, Technical Data
  • 1 Repair Information
  • 1.1 General Repair Information
  • 1.2 Contact Corrosion
  • 1.3 ATF Pump, Deactivating and Draining the Hydraulic Pump Reservoir
  • 2 Rules for Cleanliness when Working on DSG® Transmission
  • 30 - Clutch
  • 1 Clutch
  • 1.1 Overview - Flywheel and Dual Clutch
  • 1.2 Flywheel, Removing and Installing
  • 1.3 Dual Clutch, Removing and Installing
  • 1.4 Input Shaft Seal, Replacing
Buy
LAND ROVER 3

Land Rover Defender 300Tdi — Workshop Manual (1996 model year)

Workshop Manual
Defender 300Tdi Years: 1996 Manual in English 7.5 MB
Short description

Official workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.

199,00 UAH
Contents
Key sections:
  • 01 INTRODUCTION
  • 04 GENERAL SPECIFICATION DATA
  • 05 ENGINE TUNING DATA
  • 07 GENERAL FITTING REMINDERS
  • 09 LUBRICANTS, FLUIDS AND CAPACITIES
  • 10 MAINTENANCE
  • 12 ENGINE Tdi
  • - Description and operation
  • - Fault diagnosis
  • - Adjustment
  • - Repair and overhaul procedures
  • 19 FUEL SYSTEM Tdi
Buy

Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)

Workshop Manual
Defender Years: 1999–2002 Manual in English 7.6 MB
Short description

Workshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.

199,00 UAH
Contents
Key sections:
  • 01 - INTRODUCTION
  • - Introduction
  • - Dimensions
  • - References
  • - Repairs and replacements
  • - Poisonous substances
  • - Fuel handling precautions
  • - Synthetic rubber
  • - Recommended sealants
  • - Used engine oil precautions
  • - Accessories and conversions
  • - Wheels and tyres
Buy

Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)

Workshop Manual
Manual in English Pages: 494 7.1 MB
Short description

Land Rover Range Rover Electrical Library (LRL 0453ENG). Comprehensive manual covering fuse details, earth points, system descriptions, diagnostics and connector pin-outs for electrical troubleshooting and repair. Intended for technicians and service workshops.

199,00 UAH
Contents
Key sections:
  • 1 INTRODUCTION
  • 1.1 About this document
  • 1.2 Battery voltage
  • 1.3 Electrical precautions
  • 1.4 Battery disconnecting / charging
  • 1.5 Disciplines / greases
  • 1.6 Abbreviations
  • 1.7 HeVAC, sensors abbreviations
  • 1.8 How to use this document
  • 1.9 Connector detail format
  • 1.10 Fault diagnosis
  • 1.11 Wire colour codes
Buy
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Code

P2101

HUMMER P — Powertrain

Control Module Throttle Actuator Position Performance

Brand: HUMMER
Type: P — Powertrain
Views: UK: 6 EN: 20 RU: 21
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Accelerator Pedal Position (APP) sensor assembly failure
  • Throttle body / throttle control motor failure
  • Powertrain Control Module (PCM) internal fault
  • Open, shorted, damaged, or corroded wiring and connectors in APP/throttle circuits
  • Poor ground or 5V reference supply failure
  • Software or calibration issue between APP and throttle control

Symptoms

  • MIL illuminated and P2101 logged
  • Reduced engine power / limp-home mode
  • Poor or delayed throttle response
  • Cruise control disabled
  • Possible rough idle, stalling, or inability to accelerate normally
  • Intermittent or permanent loss of driveability

What to check

  • Retrieve all stored codes and freeze frame data with a capable scan tool
  • Inspect APP and throttle body connectors for corrosion, bent pins, water intrusion and secure fit
  • Visually inspect wiring harness along pedal to firewall and engine bay for damage or chafing
  • Check 5V reference and ground at APP and throttle body with key ON (back-probe)
  • Back-probe APP signal pins while operating pedal; verify sensor voltages change smoothly and correlate between redundant sensors
  • Command throttle actuator using scan tool actuator test and observe response

Signal parameters

  • APP sensors: typically two redundant signals; voltages roughly 0.5–4.5 V that change smoothly and correlate to pedal travel
  • 5V reference present at sensor supply pin (approx. 5.0 V) and good ground
  • Throttle position sensor: correlated change in signal voltage as throttle is commanded
  • Throttle actuator: PWM duty cycle 0–100% or specific frequency (varies by model) when commanded by PCM
  • Resistance or continuity: no short to ground or battery on signal lines; typical sensor input impedance per service data

Diagnostic algorithm

  1. Read and record all DTCs, freeze frame and live data for APP channels, throttle position, and actuator status.
  2. Observe live APP sensor voltages (both channels) while slowly pressing and releasing pedal. Verify both signals change smoothly without dropouts and have expected correlation.
  3. Verify 5V reference and ground at APP connector. Repair any missing reference or poor ground before further testing.
  4. Inspect wiring harness from pedal to PCM and throttle body to PCM for damage, corrosion, or pin issues. Wiggle test while monitoring signals for intermittent faults.
  5. Back-probe throttle body connector and command throttle actuator using scan tool. Confirm throttle plate moves and feedback position matches commanded value.
  6. If actuator does not respond, check power/ground to actuator and measure actuator driver signals from PCM. If driver signals absent or abnormal, suspect PCM or wiring to PCM.
  7. If APP signals are out-of-range or noisy, bench-test or swap pedal assembly (if available) to confirm. Replace APP if confirmed faulty.
  8. If actuator is mechanically seized or motor fails, replace throttle body assembly and perform required adaptations/relearn.
  9. If wiring and components test OK, consider PCM failure or software/calibration issue. Check for ECU updates and perform PCM tests per manufacturer procedures; replace PCM only if supported by diagnostics.
  10. After repairs, clear codes, perform throttle/APP relearn as required, and verify driveability and that DTC does not return.

Likely causes

  • Corroded or loose connector at the APP or throttle body
  • Broken or chafed wiring between APP and PCM or PCM and throttle actuator
  • Failed APP potentiometer or Hall-effect sensors (loss of signal or out-of-range readings)
  • Throttle actuator motor worn or mechanically stuck
  • PCM driver for throttle actuator degraded or failed
  • Recent work or water intrusion at pedal/throttle wiring causing damage

Fault status

⚠️ Status
P2101 — Accelerator Pedal Position/throttle control circuit fault. Indicates APP assembly, throttle actuator, wiring/connectors, or PCM issue causing out-of-range or failed signals; vehicle may enter limp mode and set MIL.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P2100 P2102 P2122 P2123 P2135 P2119
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Code

P2101

LAND ROVER P — Powertrain

Throttle actuator control motor - circuit range / performance

Brand: LAND ROVER
Type: P — Powertrain
Views: UK: 6 EN: 13 RU: 16
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Accelerator Pedal Position (APP) sensor assembly failure
  • Throttle body / throttle control motor failure
  • Powertrain Control Module (PCM) internal fault
  • Open, shorted, damaged, or corroded wiring and connectors in APP/throttle circuits
  • Poor ground or 5V reference supply failure
  • Software or calibration issue between APP and throttle control

Symptoms

  • MIL illuminated and P2101 logged
  • Reduced engine power / limp-home mode
  • Poor or delayed throttle response
  • Cruise control disabled
  • Possible rough idle, stalling, or inability to accelerate normally
  • Intermittent or permanent loss of driveability

What to check

  • Retrieve all stored codes and freeze frame data with a capable scan tool
  • Inspect APP and throttle body connectors for corrosion, bent pins, water intrusion and secure fit
  • Visually inspect wiring harness along pedal to firewall and engine bay for damage or chafing
  • Check 5V reference and ground at APP and throttle body with key ON (back-probe)
  • Back-probe APP signal pins while operating pedal; verify sensor voltages change smoothly and correlate between redundant sensors
  • Command throttle actuator using scan tool actuator test and observe response

Signal parameters

  • APP sensors: typically two redundant signals; voltages roughly 0.5–4.5 V that change smoothly and correlate to pedal travel
  • 5V reference present at sensor supply pin (approx. 5.0 V) and good ground
  • Throttle position sensor: correlated change in signal voltage as throttle is commanded
  • Throttle actuator: PWM duty cycle 0–100% or specific frequency (varies by model) when commanded by PCM
  • Resistance or continuity: no short to ground or battery on signal lines; typical sensor input impedance per service data

Diagnostic algorithm

  1. Read and record all DTCs, freeze frame and live data for APP channels, throttle position, and actuator status.
  2. Observe live APP sensor voltages (both channels) while slowly pressing and releasing pedal. Verify both signals change smoothly without dropouts and have expected correlation.
  3. Verify 5V reference and ground at APP connector. Repair any missing reference or poor ground before further testing.
  4. Inspect wiring harness from pedal to PCM and throttle body to PCM for damage, corrosion, or pin issues. Wiggle test while monitoring signals for intermittent faults.
  5. Back-probe throttle body connector and command throttle actuator using scan tool. Confirm throttle plate moves and feedback position matches commanded value.
  6. If actuator does not respond, check power/ground to actuator and measure actuator driver signals from PCM. If driver signals absent or abnormal, suspect PCM or wiring to PCM.
  7. If APP signals are out-of-range or noisy, bench-test or swap pedal assembly (if available) to confirm. Replace APP if confirmed faulty.
  8. If actuator is mechanically seized or motor fails, replace throttle body assembly and perform required adaptations/relearn.
  9. If wiring and components test OK, consider PCM failure or software/calibration issue. Check for ECU updates and perform PCM tests per manufacturer procedures; replace PCM only if supported by diagnostics.
  10. After repairs, clear codes, perform throttle/APP relearn as required, and verify driveability and that DTC does not return.

Likely causes

  • Corroded or loose connector at the APP or throttle body
  • Broken or chafed wiring between APP and PCM or PCM and throttle actuator
  • Failed APP potentiometer or Hall-effect sensors (loss of signal or out-of-range readings)
  • Throttle actuator motor worn or mechanically stuck
  • PCM driver for throttle actuator degraded or failed
  • Recent work or water intrusion at pedal/throttle wiring causing damage

Fault status

⚠️ Status
P2101 — Accelerator Pedal Position/throttle control circuit fault. Indicates APP assembly, throttle actuator, wiring/connectors, or PCM issue causing out-of-range or failed signals; vehicle may enter limp mode and set MIL.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P2100 P2102 P2122 P2123 P2135 P2119
Workshop Manuals

Repair manuals for LAND ROVER

3

Land Rover Defender 300Tdi — Workshop Manual (1996 model year)

Workshop Manual
Defender 300Tdi Years: 1996 Manual in English 7.5 MB
Short description

Official workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.

199,00 UAH
Contents
Key sections:
  • 01 INTRODUCTION
  • 04 GENERAL SPECIFICATION DATA
  • 05 ENGINE TUNING DATA
  • 07 GENERAL FITTING REMINDERS
  • 09 LUBRICANTS, FLUIDS AND CAPACITIES
  • 10 MAINTENANCE
  • 12 ENGINE Tdi
  • - Description and operation
  • - Fault diagnosis
  • - Adjustment
  • - Repair and overhaul procedures
  • 19 FUEL SYSTEM Tdi
Buy

Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)

Workshop Manual
Defender Years: 1999–2002 Manual in English 7.6 MB
Short description

Workshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.

199,00 UAH
Contents
Key sections:
  • 01 - INTRODUCTION
  • - Introduction
  • - Dimensions
  • - References
  • - Repairs and replacements
  • - Poisonous substances
  • - Fuel handling precautions
  • - Synthetic rubber
  • - Recommended sealants
  • - Used engine oil precautions
  • - Accessories and conversions
  • - Wheels and tyres
Buy

Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)

Workshop Manual
Manual in English Pages: 494 7.1 MB
Short description

Land Rover Range Rover Electrical Library (LRL 0453ENG). Comprehensive manual covering fuse details, earth points, system descriptions, diagnostics and connector pin-outs for electrical troubleshooting and repair. Intended for technicians and service workshops.

199,00 UAH
Contents
Key sections:
  • 1 INTRODUCTION
  • 1.1 About this document
  • 1.2 Battery voltage
  • 1.3 Electrical precautions
  • 1.4 Battery disconnecting / charging
  • 1.5 Disciplines / greases
  • 1.6 Abbreviations
  • 1.7 HeVAC, sensors abbreviations
  • 1.8 How to use this document
  • 1.9 Connector detail format
  • 1.10 Fault diagnosis
  • 1.11 Wire colour codes
Buy
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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P2101

MERCEDES-BENZ P — Powertrain

Throttle Actuator Control Motor Circuit Range/Performance

Brand: MERCEDES-BENZ
Type: P — Powertrain
Views: UK: 14 EN: 35 RU: 24
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Accelerator Pedal Position (APP) sensor assembly failure
  • Throttle body / throttle control motor failure
  • Powertrain Control Module (PCM) internal fault
  • Open, shorted, damaged, or corroded wiring and connectors in APP/throttle circuits
  • Poor ground or 5V reference supply failure
  • Software or calibration issue between APP and throttle control

Symptoms

  • MIL illuminated and P2101 logged
  • Reduced engine power / limp-home mode
  • Poor or delayed throttle response
  • Cruise control disabled
  • Possible rough idle, stalling, or inability to accelerate normally
  • Intermittent or permanent loss of driveability

What to check

  • Retrieve all stored codes and freeze frame data with a capable scan tool
  • Inspect APP and throttle body connectors for corrosion, bent pins, water intrusion and secure fit
  • Visually inspect wiring harness along pedal to firewall and engine bay for damage or chafing
  • Check 5V reference and ground at APP and throttle body with key ON (back-probe)
  • Back-probe APP signal pins while operating pedal; verify sensor voltages change smoothly and correlate between redundant sensors
  • Command throttle actuator using scan tool actuator test and observe response

Signal parameters

  • APP sensors: typically two redundant signals; voltages roughly 0.5–4.5 V that change smoothly and correlate to pedal travel
  • 5V reference present at sensor supply pin (approx. 5.0 V) and good ground
  • Throttle position sensor: correlated change in signal voltage as throttle is commanded
  • Throttle actuator: PWM duty cycle 0–100% or specific frequency (varies by model) when commanded by PCM
  • Resistance or continuity: no short to ground or battery on signal lines; typical sensor input impedance per service data

Diagnostic algorithm

  1. Read and record all DTCs, freeze frame and live data for APP channels, throttle position, and actuator status.
  2. Observe live APP sensor voltages (both channels) while slowly pressing and releasing pedal. Verify both signals change smoothly without dropouts and have expected correlation.
  3. Verify 5V reference and ground at APP connector. Repair any missing reference or poor ground before further testing.
  4. Inspect wiring harness from pedal to PCM and throttle body to PCM for damage, corrosion, or pin issues. Wiggle test while monitoring signals for intermittent faults.
  5. Back-probe throttle body connector and command throttle actuator using scan tool. Confirm throttle plate moves and feedback position matches commanded value.
  6. If actuator does not respond, check power/ground to actuator and measure actuator driver signals from PCM. If driver signals absent or abnormal, suspect PCM or wiring to PCM.
  7. If APP signals are out-of-range or noisy, bench-test or swap pedal assembly (if available) to confirm. Replace APP if confirmed faulty.
  8. If actuator is mechanically seized or motor fails, replace throttle body assembly and perform required adaptations/relearn.
  9. If wiring and components test OK, consider PCM failure or software/calibration issue. Check for ECU updates and perform PCM tests per manufacturer procedures; replace PCM only if supported by diagnostics.
  10. After repairs, clear codes, perform throttle/APP relearn as required, and verify driveability and that DTC does not return.

Likely causes

  • Corroded or loose connector at the APP or throttle body
  • Broken or chafed wiring between APP and PCM or PCM and throttle actuator
  • Failed APP potentiometer or Hall-effect sensors (loss of signal or out-of-range readings)
  • Throttle actuator motor worn or mechanically stuck
  • PCM driver for throttle actuator degraded or failed
  • Recent work or water intrusion at pedal/throttle wiring causing damage

Fault status

⚠️ Status
P2101 — Accelerator Pedal Position/throttle control circuit fault. Indicates APP assembly, throttle actuator, wiring/connectors, or PCM issue causing out-of-range or failed signals; vehicle may enter limp mode and set MIL.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P2100 P2102 P2122 P2123 P2135 P2119
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P2101

MITSUBISHI P — Powertrain

ETV motor magneto

Brand: MITSUBISHI
Type: P — Powertrain
Views: UK: 10 EN: 17 RU: 19
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Accelerator Pedal Position (APP) sensor assembly failure
  • Throttle body / throttle control motor failure
  • Powertrain Control Module (PCM) internal fault
  • Open, shorted, damaged, or corroded wiring and connectors in APP/throttle circuits
  • Poor ground or 5V reference supply failure
  • Software or calibration issue between APP and throttle control

Symptoms

  • MIL illuminated and P2101 logged
  • Reduced engine power / limp-home mode
  • Poor or delayed throttle response
  • Cruise control disabled
  • Possible rough idle, stalling, or inability to accelerate normally
  • Intermittent or permanent loss of driveability

What to check

  • Retrieve all stored codes and freeze frame data with a capable scan tool
  • Inspect APP and throttle body connectors for corrosion, bent pins, water intrusion and secure fit
  • Visually inspect wiring harness along pedal to firewall and engine bay for damage or chafing
  • Check 5V reference and ground at APP and throttle body with key ON (back-probe)
  • Back-probe APP signal pins while operating pedal; verify sensor voltages change smoothly and correlate between redundant sensors
  • Command throttle actuator using scan tool actuator test and observe response

Signal parameters

  • APP sensors: typically two redundant signals; voltages roughly 0.5–4.5 V that change smoothly and correlate to pedal travel
  • 5V reference present at sensor supply pin (approx. 5.0 V) and good ground
  • Throttle position sensor: correlated change in signal voltage as throttle is commanded
  • Throttle actuator: PWM duty cycle 0–100% or specific frequency (varies by model) when commanded by PCM
  • Resistance or continuity: no short to ground or battery on signal lines; typical sensor input impedance per service data

Diagnostic algorithm

  1. Read and record all DTCs, freeze frame and live data for APP channels, throttle position, and actuator status.
  2. Observe live APP sensor voltages (both channels) while slowly pressing and releasing pedal. Verify both signals change smoothly without dropouts and have expected correlation.
  3. Verify 5V reference and ground at APP connector. Repair any missing reference or poor ground before further testing.
  4. Inspect wiring harness from pedal to PCM and throttle body to PCM for damage, corrosion, or pin issues. Wiggle test while monitoring signals for intermittent faults.
  5. Back-probe throttle body connector and command throttle actuator using scan tool. Confirm throttle plate moves and feedback position matches commanded value.
  6. If actuator does not respond, check power/ground to actuator and measure actuator driver signals from PCM. If driver signals absent or abnormal, suspect PCM or wiring to PCM.
  7. If APP signals are out-of-range or noisy, bench-test or swap pedal assembly (if available) to confirm. Replace APP if confirmed faulty.
  8. If actuator is mechanically seized or motor fails, replace throttle body assembly and perform required adaptations/relearn.
  9. If wiring and components test OK, consider PCM failure or software/calibration issue. Check for ECU updates and perform PCM tests per manufacturer procedures; replace PCM only if supported by diagnostics.
  10. After repairs, clear codes, perform throttle/APP relearn as required, and verify driveability and that DTC does not return.

Likely causes

  • Corroded or loose connector at the APP or throttle body
  • Broken or chafed wiring between APP and PCM or PCM and throttle actuator
  • Failed APP potentiometer or Hall-effect sensors (loss of signal or out-of-range readings)
  • Throttle actuator motor worn or mechanically stuck
  • PCM driver for throttle actuator degraded or failed
  • Recent work or water intrusion at pedal/throttle wiring causing damage

Fault status

⚠️ Status
P2101 — Accelerator Pedal Position/throttle control circuit fault. Indicates APP assembly, throttle actuator, wiring/connectors, or PCM issue causing out-of-range or failed signals; vehicle may enter limp mode and set MIL.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P2100 P2102 P2122 P2123 P2135 P2119
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

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