Code
P1008
DACIA
P — Powertrain
Camshaft position (CMP) sensor, intake, bank 1 - signal fault
Views:
UK: 3
EN: 6
RU: 3
AI status
Completed
Completed
100%
Causes
- Failed or intermittent intake CMP sensor (Bank 1)
- Damaged, corroded, or disconnected sensor connector or wiring harness
- Short to power or ground, or open circuit in CMP wiring
- No reference supply voltage or poor ground to the sensor
- Timing belt/chain jumped, damaged cam phaser, or missing reluctor tooth
- Oil contamination or debris affecting sensor operation
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Difficult or no engine start, or fails to start
- Rough idle, hesitation, or misfires under load
- Reduced power or limp-home mode
- Poor fuel economy and increased emissions
- Possible irregular cam/crank correlation on scan tool
What to check
- Retrieve freeze frame and live data with a scan tool; note engine speed when the fault set
- Compare CMP signal to CKP (crank) signal for correlation while cranking and at idle
- Visually inspect CMP sensor, connector, and wiring for damage, oil, or corrosion
- Check sensor supply (Vref) and ground at the connector with ignition on
- Measure sensor output with a digital multimeter (or oscilloscope) while cranking/running
- Check for DTCs related to crank sensor, camshaft timing, or multiple cam sensors
Signal parameters
- Hall-effect type: square wave ~0–5 V (low ~0–1 V, high ~4–5 V) with frequency proportional to engine RPM
- Variable reluctance type: AC sine/alternating voltage; amplitude increases with RPM (typically tenths to volts peak-to-peak)
- At cranking: clean repetitive pulses; missing pulses or irregular amplitude/frequency indicates fault
- Reference supply typically 5 V (Vref) for Hall sensors; check for stable Vref and good ground
Diagnostic algorithm
- Read and record codes, freeze-frame, and active/confirmed status. Clear codes and attempt to re-create the fault.
- Inspect sensor and wiring: look for chafing, broken wires, melted insulation, oil contamination, and connector corrosion. Repair as needed.
- With connector disconnected, check for correct Vref and ground at the sensor connector (ignition ON).
- Backprobe the sensor output and observe signal with a scan tool or oscilloscope while cranking/running. Look for clean, consistent pulses and correct voltage levels.
- If no or erratic signal, perform continuity/resistance checks on the harness between sensor and PCM; check for shorts to battery or ground.
- If wiring and supplies are good but signal is abnormal, replace the CMP sensor and retest.
- If signal is present but cam/crank correlation is incorrect, inspect timing belt/chain, cam phaser, and reluctor wheel; repair timing issues as required.
- After repairs, clear codes, perform functional test and road test to confirm the fault does not return. If fault persists, consider PCM diagnosis or manufacturer-specific procedures.
Likely causes
- Wiring/connector damage or corrosion
- Failed CMP sensor
- Loss of reference supply (5V/Vref) or ground
- Camshaft timing slipped or reluctor damaged
- Intermittent contact due to oil-soaked/contaminated sensor
Fault status
Status
Camshaft position (CMP) sensor — intake, bank 1: signal fault. The PCM has detected an abnormal, missing, or inconsistent CMP signal from the intake cam sensor on bank 1. This can be caused by sensor failure, wiring/connector issues, loss of reference or ground, or mechanical timing/reluctor problems.
Repair difficulty: Medium
Diagnostic time: 1–3 hours
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Code
P1008
RAM
P — Powertrain
Power Steering Circuit Low
Views:
UK: 5
EN: 7
RU: 5
AI status
Completed
Completed
100%
Causes
- Failed or intermittent intake CMP sensor (Bank 1)
- Damaged, corroded, or disconnected sensor connector or wiring harness
- Short to power or ground, or open circuit in CMP wiring
- No reference supply voltage or poor ground to the sensor
- Timing belt/chain jumped, damaged cam phaser, or missing reluctor tooth
- Oil contamination or debris affecting sensor operation
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Difficult or no engine start, or fails to start
- Rough idle, hesitation, or misfires under load
- Reduced power or limp-home mode
- Poor fuel economy and increased emissions
- Possible irregular cam/crank correlation on scan tool
What to check
- Retrieve freeze frame and live data with a scan tool; note engine speed when the fault set
- Compare CMP signal to CKP (crank) signal for correlation while cranking and at idle
- Visually inspect CMP sensor, connector, and wiring for damage, oil, or corrosion
- Check sensor supply (Vref) and ground at the connector with ignition on
- Measure sensor output with a digital multimeter (or oscilloscope) while cranking/running
- Check for DTCs related to crank sensor, camshaft timing, or multiple cam sensors
Signal parameters
- Hall-effect type: square wave ~0–5 V (low ~0–1 V, high ~4–5 V) with frequency proportional to engine RPM
- Variable reluctance type: AC sine/alternating voltage; amplitude increases with RPM (typically tenths to volts peak-to-peak)
- At cranking: clean repetitive pulses; missing pulses or irregular amplitude/frequency indicates fault
- Reference supply typically 5 V (Vref) for Hall sensors; check for stable Vref and good ground
Diagnostic algorithm
- Read and record codes, freeze-frame, and active/confirmed status. Clear codes and attempt to re-create the fault.
- Inspect sensor and wiring: look for chafing, broken wires, melted insulation, oil contamination, and connector corrosion. Repair as needed.
- With connector disconnected, check for correct Vref and ground at the sensor connector (ignition ON).
- Backprobe the sensor output and observe signal with a scan tool or oscilloscope while cranking/running. Look for clean, consistent pulses and correct voltage levels.
- If no or erratic signal, perform continuity/resistance checks on the harness between sensor and PCM; check for shorts to battery or ground.
- If wiring and supplies are good but signal is abnormal, replace the CMP sensor and retest.
- If signal is present but cam/crank correlation is incorrect, inspect timing belt/chain, cam phaser, and reluctor wheel; repair timing issues as required.
- After repairs, clear codes, perform functional test and road test to confirm the fault does not return. If fault persists, consider PCM diagnosis or manufacturer-specific procedures.
Likely causes
- Wiring/connector damage or corrosion
- Failed CMP sensor
- Loss of reference supply (5V/Vref) or ground
- Camshaft timing slipped or reluctor damaged
- Intermittent contact due to oil-soaked/contaminated sensor
Fault status
Status
Camshaft position (CMP) sensor — intake, bank 1: signal fault. The PCM has detected an abnormal, missing, or inconsistent CMP signal from the intake cam sensor on bank 1. This can be caused by sensor failure, wiring/connector issues, loss of reference or ground, or mechanical timing/reluctor problems.
Repair difficulty: Medium
Diagnostic time: 1–3 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1008
RENAULT
P — Powertrain
- Camshaft position (CMP) sensor, intake, bank 1 - signal fault
Views:
UK: 6
EN: 7
RU: 4
AI status
Completed
Completed
100%
Causes
- Failed or intermittent intake CMP sensor (Bank 1)
- Damaged, corroded, or disconnected sensor connector or wiring harness
- Short to power or ground, or open circuit in CMP wiring
- No reference supply voltage or poor ground to the sensor
- Timing belt/chain jumped, damaged cam phaser, or missing reluctor tooth
- Oil contamination or debris affecting sensor operation
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Difficult or no engine start, or fails to start
- Rough idle, hesitation, or misfires under load
- Reduced power or limp-home mode
- Poor fuel economy and increased emissions
- Possible irregular cam/crank correlation on scan tool
What to check
- Retrieve freeze frame and live data with a scan tool; note engine speed when the fault set
- Compare CMP signal to CKP (crank) signal for correlation while cranking and at idle
- Visually inspect CMP sensor, connector, and wiring for damage, oil, or corrosion
- Check sensor supply (Vref) and ground at the connector with ignition on
- Measure sensor output with a digital multimeter (or oscilloscope) while cranking/running
- Check for DTCs related to crank sensor, camshaft timing, or multiple cam sensors
Signal parameters
- Hall-effect type: square wave ~0–5 V (low ~0–1 V, high ~4–5 V) with frequency proportional to engine RPM
- Variable reluctance type: AC sine/alternating voltage; amplitude increases with RPM (typically tenths to volts peak-to-peak)
- At cranking: clean repetitive pulses; missing pulses or irregular amplitude/frequency indicates fault
- Reference supply typically 5 V (Vref) for Hall sensors; check for stable Vref and good ground
Diagnostic algorithm
- Read and record codes, freeze-frame, and active/confirmed status. Clear codes and attempt to re-create the fault.
- Inspect sensor and wiring: look for chafing, broken wires, melted insulation, oil contamination, and connector corrosion. Repair as needed.
- With connector disconnected, check for correct Vref and ground at the sensor connector (ignition ON).
- Backprobe the sensor output and observe signal with a scan tool or oscilloscope while cranking/running. Look for clean, consistent pulses and correct voltage levels.
- If no or erratic signal, perform continuity/resistance checks on the harness between sensor and PCM; check for shorts to battery or ground.
- If wiring and supplies are good but signal is abnormal, replace the CMP sensor and retest.
- If signal is present but cam/crank correlation is incorrect, inspect timing belt/chain, cam phaser, and reluctor wheel; repair timing issues as required.
- After repairs, clear codes, perform functional test and road test to confirm the fault does not return. If fault persists, consider PCM diagnosis or manufacturer-specific procedures.
Likely causes
- Wiring/connector damage or corrosion
- Failed CMP sensor
- Loss of reference supply (5V/Vref) or ground
- Camshaft timing slipped or reluctor damaged
- Intermittent contact due to oil-soaked/contaminated sensor
Fault status
Status
Camshaft position (CMP) sensor — intake, bank 1: signal fault. The PCM has detected an abnormal, missing, or inconsistent CMP signal from the intake cam sensor on bank 1. This can be caused by sensor failure, wiring/connector issues, loss of reference or ground, or mechanical timing/reluctor problems.
Repair difficulty: Medium
Diagnostic time: 1–3 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email