P2A19

Code

Generic P — Powertrain

Injection Pump Fuel Metering Control D High (Cam/Rotor/Injector)

Brand: Generic

Type: P — Powertrain

Views: UK: 14 EN: 26 RU: 17

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Page language: EN

Causes

Short to battery (12V) on the Fuel Metering Control D signal or reference circuit
Open or shorted wiring/connector (corrosion, damaged insulation, chafing)
Faulty cam/rotor position sensor or injector metering solenoid associated with circuit D
Internal failure or short inside the injection pump (cam/rotor assembly)
Poor ground or low battery/charging system issues causing abnormal signal levels
ECM/PCM internal fault or incorrect software/calibration

Symptoms

Malfunction Indicator Lamp (MIL) illuminated
Engine cranking issues, hard start or no-start
Rough idle, misfire or surging
Reduced power or limp-home mode
Fuel trim or injection timing abnormalities (diagnostic data)
Possible increased fuel consumption or smoke

What to check

OBD scan: record freeze-frame data, pending codes, and live data for pump speed/position and related sensors
Visual inspection of wiring harness and connectors at injection pump and ECM for damage, corrosion, or poor pins
Check battery voltage and charging system; ensure good battery/ground before testing
Backprobe the Fuel Metering Control D signal and reference circuits with a DMM or oscilloscope
Compare signal waveform/pulses to known-good pattern or manufacturer specification
Measure resistance and continuity between pump connector and ECM (with power disconnected)

Signal parameters

Typical hall-type cam/rotor sensor: 0–5 V square wave (5 V reference), frequency proportional to engine/pump speed
Variable-reluctance sensor (if used): AC voltage amplitude rising with speed (mV to volts range depending on RPM)
Injector metering solenoid control: PWM signal, 0–12 V switched with varying duty cycle; diagnostic reference 0–100% duty
Expected idle pulse frequency and amplitude should match manufacturer tables for a given engine speed
Reasonable continuity to ECM (

Diagnostic algorithm

Retrieve full fault record, freeze frame, and related codes (P020x, fuel pressure codes, cam/crank codes). Do not replace parts without verification.
Visually inspect wiring/connectors at the pump for damage, corrosion, loose pins, water ingress, or signs of overheating.
Check battery voltage and main grounds. Verify charging system is within specification before signal testing.
With key ON (engine off) and/or engine running as required, backprobe the Pump Fuel Metering Control D signal, reference, and ground. Observe with multimeter and oscilloscope if available.
Compare the measured voltage/waveform to expected signal parameters. Look for constant high voltage (~battery) indicating short-to-power, or excessive noise/spikes.
Disconnect the pump connector and re-check wiring harness voltages at the harness side. If high voltage remains with pump disconnected, suspect wiring or ECM.
Perform resistance/continuity check from ECM pin to pump connector pin with battery disconnected. Check for short to battery or short to ground on the circuit.
Wiggle test harness while monitoring signal to check for intermittent faults. Repair any damaged wiring or connectors and retest.
If wiring and connector are good, test or replace the pump sensor/solenoid per manufacturer procedures. If possible, substitute a known-good pump or component.
If pump component replacement does not clear the fault, test ECM outputs and grounds. Repair or replace ECM only after verifying harness and pump are functional.
After repairs, clear codes and perform a road test or engine run-in while monitoring live data to confirm the fault does not return.

Likely causes

Damaged/shorted wiring or connector to the pump sensor/solenoid (most common)
Faulty meter control solenoid or cam/rotor position sensor on the injection pump
Internal short or failure in the injection pump electronics
Intermittent poor ground at pump or ECM

Fault status

⚠️ Status

Injection Pump Fuel Metering Control D High — ECM detects abnormally high voltage or signal on pump metering control/sensor circuit D. Possible wiring short to battery, faulty pump sensor/solenoid, internal pump fault, or ECM issue.

🔴 Repair difficulty: Hard

⏱️ Diagnostic time: 2.0-5.0 hours