P010E

Code

LAND ROVER P — Powertrain

Mass flow or air volume B - intermittent / irregular circuit

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 5 EN: 15 RU: 16

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Page language: EN

Causes

Poor electrical connection at MAF sensor B (corrosion, loose terminal, bent pin)
Damaged wiring harness (chafing, broken conductor, short to ground or battery)
Contaminated or failed MAF sensor (dirty hot-wire or sensing element)
Intermittent fault in PCM or connector
Intermittent supply or reference voltage (fuse, relay, wiring)
Intermittent vacuum/air leaks or intake restriction causing erratic readings

Symptoms

Check Engine Light (MIL) may illuminate intermittently
Surging, hesitation or rough idle
Reduced acceleration or poor throttle response
Occasional stalling or stumbling under load
Lower fuel economy and increased emissions
Fault may be intermittent — symptoms come and go

What to check

Read stored/freeze-frame data and pending codes with a capable scan tool
Monitor live MAF B PID (voltage/frequency and calculated airflow) while varying engine speed
Check for other related codes (fuel trims, O2 sensors, MAP, intake leaks)
Visually inspect MAF B connector and wiring for corrosion, damage or loose pins
Backprobe MAF B connector to verify 5 V reference, ground, and signal while wiggling harness
Perform wiggle test on harness and connector while monitoring signal for dropouts

Signal parameters

Sensor type may be hot-wire or hot-film — output is typically a voltage proportional to airflow (commonly ~0.5–4.5 V across operating range)
At idle the MAF signal is commonly low and should change smoothly as RPM increases; sudden spikes or dropouts indicate a problem
Some Land Rover sensors use frequency or duty‑cycle outputs; expected behavior is a smooth, proportional change with throttle
Reference voltage typically 5 V (verify exact spec in OEM data) and stable sensor ground

Diagnostic algorithm

Read codes and freeze-frame with a professional scan tool; note conditions when fault set.
Clear codes and attempt to reproduce while monitoring live MAF B signal and related PIDs (engine RPM, throttle position, fuel trims, MAF A if applicable).
Visually inspect sensor B connector and harness for damage, corrosion, or oil/contaminants. Repair any obvious issues.
Backprobe and measure: a) 5 V reference present and stable, b) good ground continuity to chassis and PCM, c) signal voltage/frequency changes smoothly with throttle. Wiggle harness to check for intermittent changes.
If noisy or erratic signal with good power/ground, remove and inspect MAF element for contamination. Clean only with approved MAF cleaner if contaminated; do not use other solvents.
If cleaning does not resolve and wiring/power/ground are good, substitute a known-good MAF B sensor (if available) or temporarily swap with MAF A (if identical) to confirm sensor fault.
Check for intake leaks or restrictions that might cause erratic airflow readings (smoke test, visual inspection).
If wiring or intermittent short is suspected, perform continuity and insulation resistance tests on harness to PCM; repair or replace damaged wiring.
If wiring and sensor check good but fault persists, consult Land Rover technical service bulletins and consider PCM input diagnostics or replacement as a last step.
After repairs clear codes and road-test to confirm fault does not return; verify fuel trims and drivability restored.

Likely causes

Dirty or failing MAF sensor B
Intermittent connector contact or corroded pin at MAF B
Damaged/chafed wire between MAF B and PCM causing intermittent open/short
Intermittent 5 V reference or sensor ground
PCM intermittent input or faulty PCM connector

Fault status

⚠️ Status

P010E — MAF (Mass Air Flow) or air volume sensor B circuit intermittent/irregular. PCM detected an unstable or erratic airflow signal from MAF sensor B. Fault may be intermittent; further inspection of sensor, wiring, connectors, and reference/ground circuits is required.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1-3 hours

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P010E — Mass flow or air volume B - intermittent / irregular circuit