P1293

Code

LAND ROVER P — Powertrain

High side of injector open - bank 1

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 7 EN: 16 RU: 18

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Page language: EN

Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
Poor idle or rough running and possible misfire(s) on cylinders of bank 1
Reduced engine power and poor acceleration
Possible increased fuel consumption and increased emissions
Engine may crank but run poorly or not start if multiple injectors on bank 1 have no supply

Read stored freeze-frame and live data from ECM; note which cylinders/injectors are flagged
Visually inspect fuse(s) and injector supply relay(s); check for blown fuse and correct relay operation
Visually inspect wiring harness and injector connectors on bank 1 for corrosion, damage, water intrusion or loose pins
Backprobe the injector high-side connector with ignition ON (engine off) — verify presence of battery voltage on the high-side supply pin
Measure injector coil resistance against manufacturer specification (bench or in‑vehicle)
Perform continuity/voltage drop checks between battery positive and injector high-side pin; wiggle test wiring while monitoring voltage

Injector high-side supply voltage with ignition ON (engine off): approx. battery voltage (nominal 11–14 V)
Injector coil resistance: compare to vehicle/manufacturer specification (varies by injector type)
Injector drive waveform: control pulses (ground-side switching or manufacturer-specific) visible on scope when engine cranks/runs
Noid light or scope should show injector command pulses when injector supply present and ECM commanding
Continuity/resistance from battery positive to the injector high-side terminal should be low (minimal voltage drop)

Safety: Park vehicle, engage parking brake, disconnect battery only when required by manufacturer procedures. Use appropriate PPE.
Record DTCs and freeze-frame data. Clear codes after initial inspection only if ready to re-test.
Inspect fuses and relays related to injector supply; replace any blown fuses and retest.
Visually inspect bank 1 injector harness/connectors for corrosion, bent terminals, water intrusion, damage, or pin loss; repair or replace any damaged connectors.
With ignition ON (engine off), backprobe the high-side supply pin at each injector on bank 1 and verify battery voltage is present. No voltage = supply open—trace wiring toward fuse/relay/ECM.
Check continuity between the injector high-side terminal and the fused battery feed/relay output; repair any open or high-resistance segments found.
Measure injector coil resistance and compare to spec; an open/infinite resistance indicates a failed injector—replace as required.
If high-side supply is present but injectors are not pulsing, use a scope or noid light to confirm ECM command pulses; if commands exist but no operation, inspect injector grounding path and injector condition.
If wiring and injectors test good and supply is present but ECM does not supply high-side or shows abnormal signals, consider ECM driver fault—verify with manufacturer diagnostic procedures before replacing ECM.
After repairs, clear codes and perform test drive/verification; monitor for reappearance of P1293 and related symptoms.

Corroded or disconnected injector supply connector or harness at bank 1 (most common)
Blown fuse or failed injector supply relay feeding injector high-side rail
Single injector failure on bank 1 that has open coil
Wiring damage (rodent chew, chafing, connector damage) interrupting supply
ECM driver fault (less common, consider after wiring and injector checks)

⚠️ Status

High-side injector supply open detected on Bank 1. Investigate injector supply fuse/relay, wiring, connectors, injector(s) and ECM driver.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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P1293 — High side of injector open - bank 1