DTC P0010700 – Manifold Absolute Pressure (MAP) / Barometric Pressure Sensor “A” – Low Input.

✅ P0010700 — MAP/BARO Sensor “A” Circuit Low Input

This code means the ECM is detecting a lower-than-expected MAP or BARO sensor voltage, indicating the sensor output is below the normal range.

🔧 Common Symptoms

Low power / sluggish acceleration

Hard starting

Black smoke (rich mixture)

Poor fuel economy

Engine may stall at idle

Turbo/boost may not build (if turbo engine)

📌 Possible Causes

1. MAP / BARO Sensor Issues

Sensor is faulty (internal short to ground)

Sensor is clogged with carbon/oil

Sensor O-ring leaking → low pressure signal

2. Wiring / Connector Faults

Signal wire shorted to ground

Open circuit in signal wire

Broken/loose connector pins

Corrosion inside connector

3. Vacuum / Intake Issues

Intake leak AFTER throttle body

Manifold gasket leakage

Boost pipe leak (turbo engines)

4. ECM Issues

Rare, but faulty ECM reference signal or ground

🔧 Step-by-Step Troubleshooting Guide

1. Visual Inspection

Check MAP/BARO sensor location (manifold or intake)

Inspect wiring harness for cuts, burns, rodent damage

Look for oil/carbon build-up inside the MAP sensor port
➤ Clean the sensor carefully (electrical contact cleaner only)

2. Check Sensor Reference Voltage (5V Supply)

Back-probe the connector

Key ON

Check 5V reference pin
✅Should be 4.9 – 5.1 V
❌ If missing → check for broken wire from ECM

3. Check Sensor Ground

Voltage drop test: < 0.1 V difference

If >0.1 V → ground wire or ECM ground is weak

4. Check MAP/BARO Signal Voltage

Key ON, Engine OFF:

Typical MAP/BARO reading: ~0.9 – 1.6 V (depends on altitude)

Engine Idling:

Typical signal: 1.5 – 2.0 V (varies by engine)

❌ If signal is stuck below 0.5 V → low input fault

Causes:

Short to ground

Sensor internally shorted

Vacuum leak causing wrong pressure reading

5. Check Actual Manifold Pressure on Scanner

Use OBD scanner:

KOEO (engine off) MAP should equal barometric pressure (~100 kPa)

If MAP reading is:
❌ Too low (<70 kPa) → sensor faulty or clogged
❌ Does not change with throttle → sensor faulty

6. Check Intake System for Leaks

Loose clamps

Cracked intake hose

Intercooler leaks (turbo engines)

Manifold gasket leak

A leak can cause incorrect MAP readings.

7. Replace MAP/BARO Sensor if Needed

Replace ONLY IF:

5V and ground are correct

Signal wire continuity is good

MAP reading on scanner is incorrect

🔧 Quick Fix Summary

Problem Solution

Sensor clogged Clean or replace MAP sensor
Short to ground Repair wiring
Broken connector pins Replace connector
Intake leak Repair hose/gasket
Sensor failure Replace MAP/BARO sensor.

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