P2672

Code

Generic P — Powertrain

Injection Pump Timing Offset

Brand: Generic

Type: P — Powertrain

Views: UK: 20 EN: 33 RU: 27

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty injection pump timing control solenoid/actuator
Wiring harness damage, poor connector contact or corrosion at pump/actuator
Incorrect or slipped mechanical timing (timing belt/chain/gear) between pump and engine
Low or unstable fuel supply / low fuel rail pressure
Faulty crankshaft or camshaft position sensor providing incorrect reference
PCM software/calibration or internal fault

Symptoms

Malfunction Indicator Lamp (MIL) illuminated
Hard starting or extended cranking
Rough idle, misfire or surging
Loss of engine power or poor acceleration
Increased smoke or abnormal exhaust emissions (diesel engines)
Reduced fuel economy

What to check

Read and record freeze frame and live data (actual vs commanded pump timing/offset)
Scan for related DTCs (crank/cam sensor, fuel pressure, communication errors)
Visual inspection of pump electrical connector and wiring for damage/corrosion
Check battery voltage and main engine grounds
Measure fuel supply/rail pressure and inspect fuel filter condition
Listen for abnormal pump noises; inspect for fuel leaks

Signal parameters

Commanded injection pump timing (degrees or % duty) — expected to follow PCM commands
Actual injection pump timing/position (degrees) — should match commanded within tolerance
Timing offset (degrees) — flagged when outside allowable range
Crankshaft position (RPM, signal integrity)
Camshaft position correlation (phase relationship)
Fuel rail/supply pressure (psi or bar)

Diagnostic algorithm

Retrieve freeze frame and related codes; note engine conditions when the code set (RPM, load, temperature, fuel pressure).
Visually inspect injection pump electrical connector, wiring harness and chassis/engine grounds. Repair any damage or corrosion.
Verify battery and charging system voltage. Low voltage can corrupt actuator control.
Check fuel supply: measure fuel rail/supply pressure and inspect for clogged filters or fuel contamination. Repair as needed.
Using a scan tool, monitor commanded vs actual pump timing/offset and actuator control signal while cranking and at idle/load. Confirm the offset reproduces.
Command the pump actuator (if supported) and observe response. Measure actuator resistance and continuity with a multimeter; compare to specification.
Check crankshaft and camshaft position sensor signals and cam/crank correlation to ensure reference timing is accurate.
Inspect mechanical timing (timing belt/chain/gears) for correct alignment or evidence of jump/slip. Correct mechanical timing if required.
If electrical and mechanical checks pass but offset persists, consider pump internal mechanical failure or faulty PCM; consult manufacturer service information for pump/module bench tests or software updates.
After repairs, clear codes and perform a road or dyno test to confirm timing returns to specification and the code does not return.

Likely causes

Failed or sticking pump timing actuator/solenoid
Electrical problem to the actuator (open, short, high resistance, intermittent connector)
Pump timing mechanically out of alignment (belt/chain jumped or incorrect installation)
Low fuel pressure or contaminated fuel affecting pump operation
Incorrect or noisy crank/cam position signal causing false offset calculation

Fault status

⚠️ Status

Injection pump timing offset detected: actual pump timing differs from commanded timing beyond allowable tolerance. Inspect pump actuator, electrical connections, fuel supply/pressure, timing components, and related sensors.

🔴 Repair difficulty: Hard

⏱️ Diagnostic time: 2.0-6.0 hours