Code
DF195
RENAULT
D
-> P0016 - Consistency cam shaft sensor / engine speed
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EN: 8
RU: 2
AI status
Completed
Completed
100%
Causes
- Timing chain/belt jumped or incorrect timing
- Worn or failed timing chain tensioner or guide
- Faulty camshaft position sensor
- Faulty crankshaft position (engine speed) sensor
- Damaged wiring or poor connector connection (sensors to ECM)
- Variable Valve Timing (VVT) actuator/phaser stuck or damaged
Symptoms
- Malfunction Indicator Lamp (MIL) or engine warning light on
- Rough idle, misfire or reduced power
- Hard starting, stalling or no-start condition
- Limp-home mode or reduced performance
- Unusual engine noise if timing components are damaged
What to check
- Read stored DTCs and freeze-frame data; note conditions when fault set
- Visually inspect cam and crank sensor connectors and wiring for damage, corrosion or looseness
- Check battery and charging voltage (low voltage can corrupt signals)
- Monitor live camshaft and crankshaft sensor signals with an oscilloscope or a capable scan tool
- Compare cam vs crank waveform correlation and timing relationship
- Inspect timing marks and verify cam/crank timing (engine at TDC as required)
Signal parameters
- Camshaft sensor: typically a digital square wave (Hall) or sinusoidal (VR) signal within ~0–5 V (Hall) or appropriate amplitude for VR sensors
- Crankshaft (engine speed) sensor: reference pulse train synchronized to crank position; timing relationship: cam position pulse occurs once every two crank revolutions (cam-to-crank correlation)
- Expected stable frequency proportional to engine RPM; waveforms should be consistent and repeatable
- No missing teeth, extra pulses or level drops on either waveform when compared across several revolutions
Diagnostic algorithm
- Retrieve DF195/P0016 and any associated codes; record freeze-frame and conditions when the code set (RPM, temp, load).
- Attempt to reproduce the fault while monitoring cam and crank sensor data with a scan tool; note RPM range and load.
- Visually inspect sensor connectors, pins and wiring harnesses for damage, corrosion or poor contact; repair as needed.
- Using an oscilloscope or scope-enabled scan tool, capture simultaneous cam and crank waveforms; verify pulse shape, amplitude and correct phase/correlation.
- If sensor signals are missing, intermittent or out of spec, test sensor resistance and supply/ground voltages; replace faulty sensor(s).
- If signals are present but correlation is wrong, verify mechanical timing: remove covers as needed and check timing belt/chain alignment marks, tensioner condition and phaser position.
- Inspect VVT solenoids/actuators and oil control valves for proper operation; test or replace if they fail to move or hold timing.
- If timing components are damaged (worn chain, stretched belt, broken guides, loose reluctor), perform necessary mechanical repair/replacement and re-time engine per manufacturer procedure.
- After repairs, clear codes and perform a road test and live-data verification to ensure cam/crank correlation is restored and code does not return.
- If all wiring, sensors and mechanical timing check good but fault persists, consider ECU diagnostics or reflash as per manufacturer guidance.
Likely causes
- Timing/slippage (chain/belt/phaser) causing cam/crank phase error
- Intermittent or failed camshaft position sensor
- Intermittent or failed crankshaft position sensor
- Connector corrosion, broken wires or poor earth
- VVT actuator or oil control valve malfunction affecting cam timing
Fault status
Status
DF195 (P0016) — Camshaft position signal inconsistent with engine speed/crankshaft position. The ECM detected a cam/crank correlation fault which can affect ignition/timing and engine performance.
Repair difficulty: Medium
Diagnostic time: 1.5–6 hours
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