P1202

Code

LAND ROVER P — Powertrain

Open injection circuit / short-circuited cylinder 2

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 12 EN: 28 RU: 23

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Page language: EN

Causes

Open circuit in injector wiring (broken conductor, open connector pin)
Short to ground or short to battery in injector wiring
Corroded or loose injector connector
Failed fuel injector (internal open or short)
Blown fuse or faulty fuel/injector relay (power supply loss)
Poor or missing ground for injector circuit

Symptoms

MIL (Check Engine Light) illuminated
Rough idle or vibration; misfire felt at idle or low load
Reduced engine power, hesitation or stumbling
Poor fuel economy and increased emissions
Possible hard starting or extended cranking
Occasional black/white smoke (engine/propulsion type dependent)

What to check

Read freeze-frame and live data: misfire counters, injector command, fuel trims
Verify stored codes and history; check for related codes (P0202, P0302 etc.)
Visually inspect injector 2 connector, wiring harness, and nearby chafe points
Check injector fuse(s) and fuel/injector relay operation
Back-probe injector connector: check battery feed (usually 12V) and control signal
Measure injector resistance with meter and compare to factory spec

Signal parameters

Injector coil resistance: consult factory spec — commonly ~12–16 Ω (high-impedance petrol) or ~1–4 Ω (low-impedance types); verify exact value in service manual
Supply voltage at injector harness: battery voltage (~11–14 V) with ignition ON
Control signal: pulsed switch (usually ground-side) — pulse width variable, typically 1–10 ms depending on engine load
Control frequency/duty: depends on engine rpm/load; pulse waveform measurable with oscilloscope
Expected current draw: varies by injector type; compare to service data

Diagnostic algorithm

Connect a scan tool, retrieve P1202 and any related codes; note freeze-frame and live data.
Visually inspect cylinder 2 injector connector and wiring for corrosion, damage, melted insulation or loose terminals.
Check relevant fuses and fuel/injector relay; replace if blown or non-functional.
With ignition ON (engine OFF), measure battery feed at injector connector (should have constant 12 V).
Crank or run engine and use a noid light or oscilloscope at the injector connector to confirm the ECM is commanding the injector (presence of pulses).
With ignition OFF, measure injector resistance across the coil and compare to factory specification. If out of range, suspect a faulty injector.
Perform continuity and resistance checks from the injector connector to the ECM pin to identify open or shorted wiring (power off, disconnect battery if necessary).
If wiring and power/ground are good, swap injector 2 with another cylinder’s injector (same type) and see if the code or misfire follows the injector. If code moves, replace the injector.
If code remains on cylinder 2 after swapping injectors, inspect harness/connector again and test the ECM injector driver (oscilloscope recommended).
Repair or replace the defective component (repair wiring, replace connector, replace injector, or replace ECM as a last resort). Clear codes and perform a road/test recheck to ensure fault is resolved.
Safety note: take standard shop safety precautions when working near fuel system components. De-energize circuits when performing continuity checks and follow manufacturer procedures for injector removal and bench testing.

Likely causes

Corroded/wet connector at cylinder 2 injector
Wiring damaged by chafing or heat near engine
Injector coil failed (open or shorted)
Connector pin pushed out or poor terminal contact
Blown injector fuse or faulty main fuel/injector relay
Faulty ECM driver (less common, verify wiring first)

Fault status

⚠️ Status

MIL ON. ECM detected open or short condition in injector circuit for cylinder 2 (injector not responding or abnormal electrical condition).

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1-3 hours

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P1202 — Open injection circuit / short-circuited cylinder 2