P0107: Manifold pressure or barometric pressure sensor signal too low
MAP / barometric pressure circuit low input
Severity: Monitor
The code reports a sensor signal that is too low; Honda lists it with a rough cold idle, but GM lists it with a reduced engine power message.
It gets more serious if:
- Inspect soon: Get it inspected soon if the engine shows a reduced power message, stalls, or will not start.
P0107 in short
P0107 means the manifold absolute pressure (MAP) sensor signal is lower than the computer expects. Likely causes are a failed MAP sensor, a wiring or connector fault, or a vacuum leak. Some Honda, GM and Ram bulletins cover it. It is often driveable, but get it checked if power drops.
The MAP sensor reports intake pressure so the computer can estimate engine load. P0107 is set when the signal voltage is lower than the computer expects, which can come from a short to ground, an open supply or a failed sensor.
Honda bulletin 04004 covers rough cold idle with the code, Ram S1808000282 lists it with P0108 and P2172 on the 2019 Ram 1500, and GM PIT5677A has dealers inspect the engine harness for shorting on 2019 Silverado and Sierra.
Check whether P0108 or P0106 are stored too.
Most likely causes
Cause 1: Failed MAP sensor
Common general cause- Why it ranks here
- Reference pages list the sensor first.
- What would change this
- Rises if the reading does not change with throttle or vacuum. Falls if it responds normally.
Cause 2: Wiring or connector fault, including harness shorting
Supported by vehicle data- Why it ranks here
- GM PIT5677A has dealers inspect the engine harness for shorting, and Ram S1808000282 covers a related harness concern.
- What would change this
- Rises if wiggling the harness changes the reading. Falls if wiring is clean.
Cause 3: Vacuum leak or restriction at the sensor
Possible — needs testing- Why it ranks here
- Reference pages list vacuum hose problems for MAP sensor codes.
- What would change this
- Rises if a hose is cracked or off. Falls if hoses are intact.
What to test first
Start at step 1. Each result tells you what it means and where to go next.
Step 1: Read all codes. Note P0108, P0106 and P2172.
IfP0108 is stored too
It meansIntermittent harness or supply fault is likely.
Points to: Wiring or connector fault, including harness shorting
IfP0107 alone
It meansCheck the MAP reading.
Step 2: Key on, engine off, read the MAP value and compare with barometric pressure; then start the engine and watch it change.
IfThe reading is stuck low or does not change
It meansMAP sensor or its circuit fault.
IfThe reading changes when the harness is moved
It meansWiring fault.
Points to: Wiring or connector fault, including harness shorting
IfA hose is cracked or off
It meansVacuum fault.
Symptoms
- Check engine light
- Rough idle, especially on a cold start
- Reduced engine power message Gets more serious: stop and have it checked.
Compare with: Rough idle with the check engine light on
How to fix
Step 1: With the engine off, check the MAP sensor connector and its vacuum hose for damage.
Parts and cost context
- Vacuum hoses and intake leaks:Check hoses before replacing the sensor. Labour varies; get a quote.
Labor varies by vehicle and shop; get a quote before you approve a repair.
Compare used part prices on PartPriceGuideOn your vehicle
RamYour car
2019 · 1500
Supported by vehicle dataRam S1808000282 lists P0107, P0108 and P2172 on the 2019 Ram 1500. Not verified as current.
S1808000282Status unverified
Check engine light with P0107, P0108 and P2172
20191500 · issued · NHTSA 10175652
Covers the light and driveability complaints with P0107, P0108 and P2172 stored on the 2019 Ram 1500.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
ChevroletYour car
2019 · Silverado 1500
Supported by vehicle dataGM PIT5677A has dealers inspect the engine harness for shorting on the 2019 Silverado 1500. Not verified as current.
2002–2004 · Trailblazer
Supported by vehicle dataGM 3192 lists P0107 with a reduced power message on the 2002 to 2004 Trailblazer. Not verified as current.
PIT5677AStatus unverified
Inspect engine harness for shorting
2019silverado-1500 · issued · NHTSA 10164784
GM preliminary information directing dealers to inspect the engine harness for shorting when customers report a light, no start, rough running or reduced power.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
3192Status unverified
Reduced engine power message or check engine light with several codes
2002–2004trailblazer · issued · NHTSA 10010867
Covers a reduced engine power message with P0107 among a list of engine codes on the Trailblazer and Envoy.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
HondaYour car
1996–2002 · Odyssey
Supported by vehicle dataHonda 04004 covers rough cold idle with P0107 or P0108. Not verified as current.
04004Status unverified
Rough idle at cold start with P0107 or P0108
1996–2002odyssey, civic, accord · issued · NHTSA 10008368
Covers rough idle at cold start with the light on and P0107 or P0108 on these Honda models.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
Related codes
All Air metering (MAF, MAP and intake air temperature) codes
Sources and review
- Honda 04004: Rough idle at cold start with P0107 or P0108
- Chevrolet 3192: Reduced engine power message or check engine light with several codes
- Chevrolet PIT5677A: Inspect engine harness for shorting
- P0107 trouble code explanation
- P0107 OBD-II trouble code
- Ram S1808000282: Check engine light with P0107, P0108 and P2172
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error