Code
P1147
CITROEN
P — Powertrain
Variable distribution electrovalve (VTC)
Views:
UK: 16
EN: 33
RU: 23
AI status
Completed
Completed
100%
Causes
- Faulty VTC (VVT) solenoid / electrovalve (stuck, clogged or failed)
- Damaged or corroded connector or wiring (open, short to ground or +12V, intermittent)
- Low or contaminated engine oil (incorrect viscosity, sludge) causing poor VTC operation
- Faulty camshaft phaser (mechanical seizure or excessive wear)
- Engine control module (ECU) fault or poor ground
- Related sensor faults (camshaft position sensor giving incorrect feedback)
Symptoms
- Malfunction Indicator Lamp (MIL) / check engine light illuminated
- Rough idle, hesitation or reduced engine power
- Poor fuel economy and increased emissions
- Hard starting or stalling in some cases
- Unusual engine noise from valve train at idle or low speed
- Possible limp-home mode / reduced torque on some vehicles
What to check
- Read stored freeze-frame data and all related DTCs with a diagnostic scanner
- Check oil level, condition and correct viscosity; top up or change if dirty or low
- Visually inspect VTC solenoid connector and wiring for damage, corrosion, or poor pins
- Check battery and charging system voltage (low voltage can affect solenoid operation)
- Inspect camshaft position sensor signals and synchronization with crankshaft
- Verify ECU grounds and fuses for the VTC circuit
Signal parameters
- Command signal: ECU typically switches solenoid with a PWM or switched +12V ground; observe duty cycle when active
- Supply voltage: near battery voltage (approx. 11–14 V) when commanded
- Coil resistance: VTC solenoid resistance normally low (single to double digit ohms); consult vehicle-specific data for exact value
- Continuity: expect low resistance from solenoid connector to ECU (no open circuit)
- Cam position feedback: camshaft sensor pulses should change when VTC commanded; monitor with scope or live data
Diagnostic algorithm
- Connect a capable scan tool, read P1147 and any related codes, record freeze frame and live data while engine is cold and warmed up.
- Check and correct engine oil level and quality before extensive electrical testing (dirty/low oil is a common cause).
- Perform a visual inspection of the VTC solenoid, connector and wiring harness. Repair any obvious damage or corrosion.
- With ignition off, unplug the solenoid and inspect pins for corrosion/fit. Wiggle test harness with connector plugged while monitoring for intermittent faults.
- Measure solenoid coil resistance at the connector and compare to vehicle spec. If open or out of range, replace the solenoid.
- Check supply and control signals with a multimeter or scope while commanding the VTC from the scan tool (verify battery voltage to solenoid and pulsed control from ECU).
- Check continuity to ECU and for shorts to battery or ground. Repair wiring or connector faults found.
- Monitor camshaft position sensor signals while commanding VTC; confirm cam timing changes and that cam sensor feedback follows ECU commands.
- If electrical and oil/system checks pass but VTC does not move, remove and bench-test or replace the VTC solenoid and/or cam phaser as required.
- After repair, clear codes and perform a road test or relearn procedure per manufacturer; verify code does not return.
Likely causes
- Clogged or electrically failed VTC solenoid
- Poor electrical connection at solenoid (corrosion, loose pin) or damaged harness
- Low or dirty oil causing sluggish/blocked VTC movement
Fault status
Status
The ECU has detected an abnormal condition in the variable timing electrovalve (VTC) circuit or its operation. The fault is stored and the MIL is illuminated. Cam timing may be limited causing reduced performance and increased emissions until the issue is resolved.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1147
DAEWOO
P — Powertrain
ACCEL POS SNSR CT MAL -ETS
Views:
UK: 17
EN: 28
RU: 24
AI status
Completed
Completed
100%
Causes
- Faulty VTC (VVT) solenoid / electrovalve (stuck, clogged or failed)
- Damaged or corroded connector or wiring (open, short to ground or +12V, intermittent)
- Low or contaminated engine oil (incorrect viscosity, sludge) causing poor VTC operation
- Faulty camshaft phaser (mechanical seizure or excessive wear)
- Engine control module (ECU) fault or poor ground
- Related sensor faults (camshaft position sensor giving incorrect feedback)
Symptoms
- Malfunction Indicator Lamp (MIL) / check engine light illuminated
- Rough idle, hesitation or reduced engine power
- Poor fuel economy and increased emissions
- Hard starting or stalling in some cases
- Unusual engine noise from valve train at idle or low speed
- Possible limp-home mode / reduced torque on some vehicles
What to check
- Read stored freeze-frame data and all related DTCs with a diagnostic scanner
- Check oil level, condition and correct viscosity; top up or change if dirty or low
- Visually inspect VTC solenoid connector and wiring for damage, corrosion, or poor pins
- Check battery and charging system voltage (low voltage can affect solenoid operation)
- Inspect camshaft position sensor signals and synchronization with crankshaft
- Verify ECU grounds and fuses for the VTC circuit
Signal parameters
- Command signal: ECU typically switches solenoid with a PWM or switched +12V ground; observe duty cycle when active
- Supply voltage: near battery voltage (approx. 11–14 V) when commanded
- Coil resistance: VTC solenoid resistance normally low (single to double digit ohms); consult vehicle-specific data for exact value
- Continuity: expect low resistance from solenoid connector to ECU (no open circuit)
- Cam position feedback: camshaft sensor pulses should change when VTC commanded; monitor with scope or live data
Diagnostic algorithm
- Connect a capable scan tool, read P1147 and any related codes, record freeze frame and live data while engine is cold and warmed up.
- Check and correct engine oil level and quality before extensive electrical testing (dirty/low oil is a common cause).
- Perform a visual inspection of the VTC solenoid, connector and wiring harness. Repair any obvious damage or corrosion.
- With ignition off, unplug the solenoid and inspect pins for corrosion/fit. Wiggle test harness with connector plugged while monitoring for intermittent faults.
- Measure solenoid coil resistance at the connector and compare to vehicle spec. If open or out of range, replace the solenoid.
- Check supply and control signals with a multimeter or scope while commanding the VTC from the scan tool (verify battery voltage to solenoid and pulsed control from ECU).
- Check continuity to ECU and for shorts to battery or ground. Repair wiring or connector faults found.
- Monitor camshaft position sensor signals while commanding VTC; confirm cam timing changes and that cam sensor feedback follows ECU commands.
- If electrical and oil/system checks pass but VTC does not move, remove and bench-test or replace the VTC solenoid and/or cam phaser as required.
- After repair, clear codes and perform a road test or relearn procedure per manufacturer; verify code does not return.
Likely causes
- Clogged or electrically failed VTC solenoid
- Poor electrical connection at solenoid (corrosion, loose pin) or damaged harness
- Low or dirty oil causing sluggish/blocked VTC movement
Fault status
Status
The ECU has detected an abnormal condition in the variable timing electrovalve (VTC) circuit or its operation. The fault is stored and the MIL is illuminated. Cam timing may be limited causing reduced performance and increased emissions until the issue is resolved.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1147
DS
P — Powertrain
Variable distribution electrovalve (VTC)
Views:
UK: 13
EN: 28
RU: 19
AI status
Completed
Completed
100%
Causes
- Faulty VTC (VVT) solenoid / electrovalve (stuck, clogged or failed)
- Damaged or corroded connector or wiring (open, short to ground or +12V, intermittent)
- Low or contaminated engine oil (incorrect viscosity, sludge) causing poor VTC operation
- Faulty camshaft phaser (mechanical seizure or excessive wear)
- Engine control module (ECU) fault or poor ground
- Related sensor faults (camshaft position sensor giving incorrect feedback)
Symptoms
- Malfunction Indicator Lamp (MIL) / check engine light illuminated
- Rough idle, hesitation or reduced engine power
- Poor fuel economy and increased emissions
- Hard starting or stalling in some cases
- Unusual engine noise from valve train at idle or low speed
- Possible limp-home mode / reduced torque on some vehicles
What to check
- Read stored freeze-frame data and all related DTCs with a diagnostic scanner
- Check oil level, condition and correct viscosity; top up or change if dirty or low
- Visually inspect VTC solenoid connector and wiring for damage, corrosion, or poor pins
- Check battery and charging system voltage (low voltage can affect solenoid operation)
- Inspect camshaft position sensor signals and synchronization with crankshaft
- Verify ECU grounds and fuses for the VTC circuit
Signal parameters
- Command signal: ECU typically switches solenoid with a PWM or switched +12V ground; observe duty cycle when active
- Supply voltage: near battery voltage (approx. 11–14 V) when commanded
- Coil resistance: VTC solenoid resistance normally low (single to double digit ohms); consult vehicle-specific data for exact value
- Continuity: expect low resistance from solenoid connector to ECU (no open circuit)
- Cam position feedback: camshaft sensor pulses should change when VTC commanded; monitor with scope or live data
Diagnostic algorithm
- Connect a capable scan tool, read P1147 and any related codes, record freeze frame and live data while engine is cold and warmed up.
- Check and correct engine oil level and quality before extensive electrical testing (dirty/low oil is a common cause).
- Perform a visual inspection of the VTC solenoid, connector and wiring harness. Repair any obvious damage or corrosion.
- With ignition off, unplug the solenoid and inspect pins for corrosion/fit. Wiggle test harness with connector plugged while monitoring for intermittent faults.
- Measure solenoid coil resistance at the connector and compare to vehicle spec. If open or out of range, replace the solenoid.
- Check supply and control signals with a multimeter or scope while commanding the VTC from the scan tool (verify battery voltage to solenoid and pulsed control from ECU).
- Check continuity to ECU and for shorts to battery or ground. Repair wiring or connector faults found.
- Monitor camshaft position sensor signals while commanding VTC; confirm cam timing changes and that cam sensor feedback follows ECU commands.
- If electrical and oil/system checks pass but VTC does not move, remove and bench-test or replace the VTC solenoid and/or cam phaser as required.
- After repair, clear codes and perform a road test or relearn procedure per manufacturer; verify code does not return.
Likely causes
- Clogged or electrically failed VTC solenoid
- Poor electrical connection at solenoid (corrosion, loose pin) or damaged harness
- Low or dirty oil causing sluggish/blocked VTC movement
Fault status
Status
The ECU has detected an abnormal condition in the variable timing electrovalve (VTC) circuit or its operation. The fault is stored and the MIL is illuminated. Cam timing may be limited causing reduced performance and increased emissions until the issue is resolved.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1147
LAND ROVER
P — Powertrain
Correlation of collector air temperature / air temperature of admission
Views:
UK: 16
EN: 30
RU: 19
AI status
Completed
Completed
100%
Causes
- Faulty VTC (VVT) solenoid / electrovalve (stuck, clogged or failed)
- Damaged or corroded connector or wiring (open, short to ground or +12V, intermittent)
- Low or contaminated engine oil (incorrect viscosity, sludge) causing poor VTC operation
- Faulty camshaft phaser (mechanical seizure or excessive wear)
- Engine control module (ECU) fault or poor ground
- Related sensor faults (camshaft position sensor giving incorrect feedback)
Symptoms
- Malfunction Indicator Lamp (MIL) / check engine light illuminated
- Rough idle, hesitation or reduced engine power
- Poor fuel economy and increased emissions
- Hard starting or stalling in some cases
- Unusual engine noise from valve train at idle or low speed
- Possible limp-home mode / reduced torque on some vehicles
What to check
- Read stored freeze-frame data and all related DTCs with a diagnostic scanner
- Check oil level, condition and correct viscosity; top up or change if dirty or low
- Visually inspect VTC solenoid connector and wiring for damage, corrosion, or poor pins
- Check battery and charging system voltage (low voltage can affect solenoid operation)
- Inspect camshaft position sensor signals and synchronization with crankshaft
- Verify ECU grounds and fuses for the VTC circuit
Signal parameters
- Command signal: ECU typically switches solenoid with a PWM or switched +12V ground; observe duty cycle when active
- Supply voltage: near battery voltage (approx. 11–14 V) when commanded
- Coil resistance: VTC solenoid resistance normally low (single to double digit ohms); consult vehicle-specific data for exact value
- Continuity: expect low resistance from solenoid connector to ECU (no open circuit)
- Cam position feedback: camshaft sensor pulses should change when VTC commanded; monitor with scope or live data
Diagnostic algorithm
- Connect a capable scan tool, read P1147 and any related codes, record freeze frame and live data while engine is cold and warmed up.
- Check and correct engine oil level and quality before extensive electrical testing (dirty/low oil is a common cause).
- Perform a visual inspection of the VTC solenoid, connector and wiring harness. Repair any obvious damage or corrosion.
- With ignition off, unplug the solenoid and inspect pins for corrosion/fit. Wiggle test harness with connector plugged while monitoring for intermittent faults.
- Measure solenoid coil resistance at the connector and compare to vehicle spec. If open or out of range, replace the solenoid.
- Check supply and control signals with a multimeter or scope while commanding the VTC from the scan tool (verify battery voltage to solenoid and pulsed control from ECU).
- Check continuity to ECU and for shorts to battery or ground. Repair wiring or connector faults found.
- Monitor camshaft position sensor signals while commanding VTC; confirm cam timing changes and that cam sensor feedback follows ECU commands.
- If electrical and oil/system checks pass but VTC does not move, remove and bench-test or replace the VTC solenoid and/or cam phaser as required.
- After repair, clear codes and perform a road test or relearn procedure per manufacturer; verify code does not return.
Likely causes
- Clogged or electrically failed VTC solenoid
- Poor electrical connection at solenoid (corrosion, loose pin) or damaged harness
- Low or dirty oil causing sluggish/blocked VTC movement
Fault status
Status
The ECU has detected an abnormal condition in the variable timing electrovalve (VTC) circuit or its operation. The fault is stored and the MIL is illuminated. Cam timing may be limited causing reduced performance and increased emissions until the issue is resolved.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Repair manuals
Manual library for LAND ROVER
160
Browse 160 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
LAND ROVER
-
LAND ROVER: 2023
-
Range Rover Velar
-
-
LAND ROVER: 2022
-
Discovery Sport
-
Range Rover
- Autobiography, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover Autobiography
- 2022 Range Rover Base
- First Edition
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover HSE Westminster
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover SE
- SE, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover SE
- SV
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
-
Range Rover Evoque
-
Range Rover Sport
-
Range Rover Velar
-
LAND ROVER: 2021
-
Discovery Sport
-
Range Rover
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Autobiography
- Autobiography Fifty Edition
- 2021 Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover HSE
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover HSE Westminster
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
-
Range Rover Evoque
-
Range Rover Sport
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography Dynamic
- HSE Dynamic
- HSE Silver Edition, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Sport HSE Silver Edition
- HST
- SE
- SVR
- SVR Carbon Edition
-
Range Rover Velar
-
LAND ROVER: 2020
-
Discovery
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE
- HSE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE
- HSE Luxury, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE Luxury
- Landmark
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery SE
- SE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery SE
-
Discovery Sport
-
Range Rover
- Autobiography
- Base, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Base
- Base, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover HSE
- SVAutobiography
- SVAutobiography Dynamic
-
Range Rover Evoque
-
Range Rover Sport
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport Autobiography Dynamic
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport HSE
- HSE Dynamic
- HSE PHEV
- HST
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport SE
- SVR
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar S
- S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar S
- SVAutobiography Dyn.
-
LAND ROVER: 2019
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Code
P1147
PEUGEOT
P — Powertrain
Variable distribution electrovalve (VTC)
Views:
UK: 16
EN: 28
RU: 18
AI status
Completed
Completed
100%
Causes
- Faulty VTC (VVT) solenoid / electrovalve (stuck, clogged or failed)
- Damaged or corroded connector or wiring (open, short to ground or +12V, intermittent)
- Low or contaminated engine oil (incorrect viscosity, sludge) causing poor VTC operation
- Faulty camshaft phaser (mechanical seizure or excessive wear)
- Engine control module (ECU) fault or poor ground
- Related sensor faults (camshaft position sensor giving incorrect feedback)
Symptoms
- Malfunction Indicator Lamp (MIL) / check engine light illuminated
- Rough idle, hesitation or reduced engine power
- Poor fuel economy and increased emissions
- Hard starting or stalling in some cases
- Unusual engine noise from valve train at idle or low speed
- Possible limp-home mode / reduced torque on some vehicles
What to check
- Read stored freeze-frame data and all related DTCs with a diagnostic scanner
- Check oil level, condition and correct viscosity; top up or change if dirty or low
- Visually inspect VTC solenoid connector and wiring for damage, corrosion, or poor pins
- Check battery and charging system voltage (low voltage can affect solenoid operation)
- Inspect camshaft position sensor signals and synchronization with crankshaft
- Verify ECU grounds and fuses for the VTC circuit
Signal parameters
- Command signal: ECU typically switches solenoid with a PWM or switched +12V ground; observe duty cycle when active
- Supply voltage: near battery voltage (approx. 11–14 V) when commanded
- Coil resistance: VTC solenoid resistance normally low (single to double digit ohms); consult vehicle-specific data for exact value
- Continuity: expect low resistance from solenoid connector to ECU (no open circuit)
- Cam position feedback: camshaft sensor pulses should change when VTC commanded; monitor with scope or live data
Diagnostic algorithm
- Connect a capable scan tool, read P1147 and any related codes, record freeze frame and live data while engine is cold and warmed up.
- Check and correct engine oil level and quality before extensive electrical testing (dirty/low oil is a common cause).
- Perform a visual inspection of the VTC solenoid, connector and wiring harness. Repair any obvious damage or corrosion.
- With ignition off, unplug the solenoid and inspect pins for corrosion/fit. Wiggle test harness with connector plugged while monitoring for intermittent faults.
- Measure solenoid coil resistance at the connector and compare to vehicle spec. If open or out of range, replace the solenoid.
- Check supply and control signals with a multimeter or scope while commanding the VTC from the scan tool (verify battery voltage to solenoid and pulsed control from ECU).
- Check continuity to ECU and for shorts to battery or ground. Repair wiring or connector faults found.
- Monitor camshaft position sensor signals while commanding VTC; confirm cam timing changes and that cam sensor feedback follows ECU commands.
- If electrical and oil/system checks pass but VTC does not move, remove and bench-test or replace the VTC solenoid and/or cam phaser as required.
- After repair, clear codes and perform a road test or relearn procedure per manufacturer; verify code does not return.
Likely causes
- Clogged or electrically failed VTC solenoid
- Poor electrical connection at solenoid (corrosion, loose pin) or damaged harness
- Low or dirty oil causing sluggish/blocked VTC movement
Fault status
Status
The ECU has detected an abnormal condition in the variable timing electrovalve (VTC) circuit or its operation. The fault is stored and the MIL is illuminated. Cam timing may be limited causing reduced performance and increased emissions until the issue is resolved.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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+100 karma for a short comment :)
Was this AI description helpful?
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👍 Like
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Code
P1147
VOLKSWAGEN
P — Powertrain
Oxygen Sensor Control Bank 2 System Too Lean
Views:
UK: 23
EN: 45
RU: 29
AI status
Completed
Completed
100%
Causes
- Faulty VTC (VVT) solenoid / electrovalve (stuck, clogged or failed)
- Damaged or corroded connector or wiring (open, short to ground or +12V, intermittent)
- Low or contaminated engine oil (incorrect viscosity, sludge) causing poor VTC operation
- Faulty camshaft phaser (mechanical seizure or excessive wear)
- Engine control module (ECU) fault or poor ground
- Related sensor faults (camshaft position sensor giving incorrect feedback)
Symptoms
- Malfunction Indicator Lamp (MIL) / check engine light illuminated
- Rough idle, hesitation or reduced engine power
- Poor fuel economy and increased emissions
- Hard starting or stalling in some cases
- Unusual engine noise from valve train at idle or low speed
- Possible limp-home mode / reduced torque on some vehicles
What to check
- Read stored freeze-frame data and all related DTCs with a diagnostic scanner
- Check oil level, condition and correct viscosity; top up or change if dirty or low
- Visually inspect VTC solenoid connector and wiring for damage, corrosion, or poor pins
- Check battery and charging system voltage (low voltage can affect solenoid operation)
- Inspect camshaft position sensor signals and synchronization with crankshaft
- Verify ECU grounds and fuses for the VTC circuit
Signal parameters
- Command signal: ECU typically switches solenoid with a PWM or switched +12V ground; observe duty cycle when active
- Supply voltage: near battery voltage (approx. 11–14 V) when commanded
- Coil resistance: VTC solenoid resistance normally low (single to double digit ohms); consult vehicle-specific data for exact value
- Continuity: expect low resistance from solenoid connector to ECU (no open circuit)
- Cam position feedback: camshaft sensor pulses should change when VTC commanded; monitor with scope or live data
Diagnostic algorithm
- Connect a capable scan tool, read P1147 and any related codes, record freeze frame and live data while engine is cold and warmed up.
- Check and correct engine oil level and quality before extensive electrical testing (dirty/low oil is a common cause).
- Perform a visual inspection of the VTC solenoid, connector and wiring harness. Repair any obvious damage or corrosion.
- With ignition off, unplug the solenoid and inspect pins for corrosion/fit. Wiggle test harness with connector plugged while monitoring for intermittent faults.
- Measure solenoid coil resistance at the connector and compare to vehicle spec. If open or out of range, replace the solenoid.
- Check supply and control signals with a multimeter or scope while commanding the VTC from the scan tool (verify battery voltage to solenoid and pulsed control from ECU).
- Check continuity to ECU and for shorts to battery or ground. Repair wiring or connector faults found.
- Monitor camshaft position sensor signals while commanding VTC; confirm cam timing changes and that cam sensor feedback follows ECU commands.
- If electrical and oil/system checks pass but VTC does not move, remove and bench-test or replace the VTC solenoid and/or cam phaser as required.
- After repair, clear codes and perform a road test or relearn procedure per manufacturer; verify code does not return.
Likely causes
- Clogged or electrically failed VTC solenoid
- Poor electrical connection at solenoid (corrosion, loose pin) or damaged harness
- Low or dirty oil causing sluggish/blocked VTC movement
Fault status
Status
The ECU has detected an abnormal condition in the variable timing electrovalve (VTC) circuit or its operation. The fault is stored and the MIL is illuminated. Cam timing may be limited causing reduced performance and increased emissions until the issue is resolved.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Repair manuals
Manual library for VOLKSWAGEN
139
Browse 139 VOLKSWAGEN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
VOLKSWAGEN
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VOLKSWAGEN: 2021
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- S, AWD
- S, FWD
- SE, 2.0L Eng VIN P, AWD
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-
Atlas Cross Sport
- S, AWD
- S, FWD
- SE, 2.0L Eng VIN C, AWD
- SE, 2.0L Eng VIN C, FWD
- SE, 3.6L Eng VIN E, AWD
- SE, 3.6L Eng VIN E, FWD
- SEL, 2.0L Eng VIN C · 2.0L Eng VIN C2021: Atlas Cross Sport SEL
- SEL, 3.6L Eng VIN E, AWD
- SEL, 3.6L Eng VIN E, FWD
- SEL Premium, 2.0L Eng VIN C · 2.0L Eng VIN C2021: Atlas Cross Sport SEL Premium
- SEL Premium, 3.6L Eng VIN E · 3.6L Eng VIN E2021: Atlas Cross Sport SEL Premium
- SEL Premium R-Line
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
-
VOLKSWAGEN: 2020
-
Atlas
- S, 2.0L Eng VIN P · 2.0L Eng VIN P2020: Atlas S
- S, 3.6L Eng VIN R · 3.6L Eng VIN R2020: Atlas S
- SE, 2.0L Eng VIN P · 2.0L Eng VIN P2020: Atlas SE
- SE, 3.6L Eng VIN R, AWD
- SE, 3.6L Eng VIN R, FWD
- SEL, 2.0L Eng VIN P · 2.0L Eng VIN P2020: Atlas SEL
- SEL, 3.6L Eng VIN R, AWD
- SEL, 3.6L Eng VIN R, FWD
- SEL Premium
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
-
Atlas Cross Sport
- S, AWD
- S, FWD
- SE, 2.0L Eng VIN C, AWD
- SE, 2.0L Eng VIN C, FWD
- SE, 3.6L Eng VIN E, AWD
- SE, 3.6L Eng VIN E, FWD
- SEL, 2.0L Eng VIN C, AWD
- SEL, 2.0L Eng VIN C, FWD
- SEL, 3.6L Eng VIN E, AWD
- SEL, 3.6L Eng VIN E, FWD
- SEL Premium
- SEL Premium R-Line
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
-
Jetta
- GLI Autobahn, Automatic DCT Trans
- GLI Autobahn, Standard Trans
- GLI S, Automatic DCT Trans
- GLI S, Standard Trans
- R-Line, 1.4L Eng VIN 5, Automatic Trans
- R-Line, 1.4L Eng VIN 5, Standard Trans
- R-Line, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta R-Line
- S, 1.4L Eng VIN 5, Automatic Trans
- S, 1.4L Eng VIN 5, Standard Trans
- S, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta S
- SE, 1.4L Eng VIN 5 · 1.4L Eng VIN 52020: Jetta SE
- SE, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta SE
- SEL, 1.4L Eng VIN 5 · 1.4L Eng VIN 52020: Jetta SEL
- SEL, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta SEL
- SEL Premium, 1.4L Eng VIN 5 · 1.4L Eng VIN 52020: Jetta SEL Premium
- SEL Premium, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta SEL Premium
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