P1507

Code

LAND ROVER P — Powertrain

Idle speed control system RPM greater than expected - bank 2

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 21 EN: 32 RU: 29

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Page language: EN

Causes

Intake vacuum leak on bank 2 (manifold gasket, vacuum hose, PCV hose)
Sticking or contaminated throttle body/throttle plate
Faulty or stuck idle air control (IAC) actuator/stepper motor or electronic throttle actuator on bank 2
Faulty throttle position sensor (TPS) or throttle actuator position sensor
MAF or MAP sensor providing incorrect readings
Wiring/connectors open/shorted for idle control, TPS, MAF, MAP or ECU

Symptoms

Elevated idle RPM above normal target (surging possible)
Hard-to-control idle when cold or warm
Increased fuel consumption at idle
Rough idle or uneven idle between banks
Check Engine Light (MIL) on with P1507 stored
Possible hesitation or stumble when returning to idle

What to check

Retrieve freeze frame and freeze data: recorded RPM, engine temp, load, and other active DTCs
Compare actual RPM vs commanded idle RPM using a scan tool
Scan live data: throttle position/angle, throttle actuator command, IAC duty or position (if present), MAF, MAP, intake air temp, coolant temp, long/short term fuel trims, O2 sensor voltages on bank 2
Visually inspect intake manifold gaskets, vacuum lines, PCV hoses and connectors on bank 2
Perform smoke test to find vacuum leaks on bank 2 intake side
Inspect throttle body for carbon build-up and free movement of throttle plate

Signal parameters

Engine RPM (actual) vs Commanded Idle RPM
Throttle Position (%) or Angle (idle and commanded)
Throttle Actuator Position / Command (ETC systems)
IAC valve duty cycle or position (if equipped)
MAF g/s or MAP (kPa) at idle
Short-term and long-term fuel trims (bank 2)

Diagnostic algorithm

Connect a capable scan tool and confirm P1507 is current or historic; record freeze frame data.
Verify engine is at normal operating temperature and that idle target is known; note commanded idle RPM and measured RPM.
Check for additional related codes (MAF, MAP, TPS, EVAP, P1506 etc.) and resolve those first.
With engine idling, observe live data: actual RPM, commanded idle, throttle position/angle, throttle actuator command, IAC position/duty, MAF/MAP, and fuel trims. Note anomalies on bank 2.
Visually inspect intake boots, manifold gasket, vacuum hoses and PCV/evap plumbing on bank 2. Perform a smoke test to identify vacuum leaks.
Clean the throttle body and throttle plate. Verify smooth throttle plate movement and that the throttle returns to closed position when commanded.
If equipped with an idle air control valve, command it via scan tool (if possible) and observe movement/response; perform resistance checks per service data.
Inspect wiring and connectors for the throttle actuator, TPS, IAC, MAF and MAP on the bank 2 side. Repair any damaged wiring/poor connections.
If sensors (MAF, MAP, TPS) show suspect values, test/replace per manufacturer procedures. Check fuel trims and O2 sensors for corroborating evidence of unmetered air or sensor faults.
After repairs, clear DTCs and perform a drive cycle or idle relearn/adaptation procedure as specified by the manufacturer. Confirm RPM returns to target and code does not reappear.
If fault persists, consider ECU/PCM software updates or professional diagnosis for intermittent wiring or control module faults.

Likely causes

Vacuum leak on bank 2 intake manifold or hoses
Contaminated/sticking throttle body or idle actuator
Faulty throttle position/actuator sensor or wiring specific to bank 2

Fault status

⚠️ Status

Idle speed greater than expected — Bank 2. The engine control module has detected measured RPM above the commanded idle setpoint for bank 2 and stored the P1507 fault.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1–3 hours

Repair manuals

Manual library for LAND ROVER

413

Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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P1507 — Idle speed control system RPM greater than expected - bank 2