P1103 OBD-II Trouble Code: Mass Airflow Sensor in Range But Higher Than Expected

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P1103 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P1103 code

P1103 is a diagnostic trouble code (DTC) for "Mass Airflow Sensor in Range But Higher Than Expected". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P1103 DIAGNOSTIC Get a fair and transparent estimate upfront

diagnostic check engine light

P1103 code definition

The Powertrain Control Module (PCM) stores a P1103 trouble code when the voltage signal from the Mass Air Flow (MAF) sensor is higher than normal but still falls within the range specified by the manufacturer. In addition to a P1103 trouble code, other related codes the PCM might store include a P1100, P1101, P1102, and P1104 code.

What the P1103 code means

The MAF sensor sends data to the PCM in the form of a voltage signal. If the PCM receives a voltage signal from the MAF sensor that is higher than what the manufacturer has specified but the signal still falls within established parameters, a P1103 trouble code is stored and the check engine light illuminates.

What causes the P1103 code?

A common cause of a P1103 trouble code is faulty or loose wiring and connectors within the MAF sensor wiring harness. In addition to this, a leak in the vacuum system, either before or after the MAF sensor, can cause the PCM to store this code. A clogged MAF sensor screen or a dirty or bad MAF sensor are some other likely causes of a code storage.

What are the symptoms of the P1103 code?

Symptoms of a P1103 trouble code include stalling when idling, an erratically running engine, and reduced power while accelerating. In addition, a vehicle can suffer from reduced fuel efficiency from the conditions that cause a P1103 trouble code.

How does a mechanic diagnose the P1103 code?

To diagnose the P1103 trouble code, a mechanic needs to use an advanced scanner, an evaporative smoke tester, and a digital volt/ohm meter. Once the mechanic has the necessary equipment, they need to perform the following steps:

  • Inspect all wiring, connectors, and components associated with the MAF sensor, including the wiring harness. The mechanic is looking for any damaged, loose, or faulty wiring, connectors, or components when doing this inspection.
  • Remove the air filter and determine if it needs replacing.
  • While the mechanic has the air filter out, they should carefully remove the MAF sensor for cleaning with a CRC 05110 spray cleaner.
  • Next, once all components are cleaned, repaired, or replaced, the mechanic should clear the code and test the system, with the vehicle running, to see if the code returns.
  • If the code returns, the mechanic should first download any freeze frame data and stored trouble codes and then perform a smoke test to check for leaks within the vacuum system using an evaporative smoke tester.
  • Then they should clear the code after fixing any leaks and see if the code returns.
  • If the code returns, they should use a digital volt/ohm meter to test the voltage and ground signal of the MAF sensor.
  • If there is no voltage or ground signal at the MAF sensor, the mechanic should disconnect the PCM and check the continuity of the MAF sensor and circuit with the battery ground. The mechanic should also test the continuity between the MAF sensor circuit and the PCM.
  • Once all of the necessary repairs are made, the mechanic should clear the code and retest the system to see if the code returns.

Common mistakes when diagnosing the P1103 code

A mistake common to P1103 trouble code diagnosing is for the mechanic to replace the MAF sensor without checking the wiring for fault, damage, or looseness. The result is that the problem is not fixed and the code returns.

How serious is the P1103 code?

While a vehicle can still operate with a P1103 trouble code stored, the erratic running condition of the engine and the subsequent stalling while idling can make the vehicle difficult to drive. The reduced fuel efficiency also leads to more costs when putting fuel into the vehicle. Because of this, it is recommended that you deal with a P1103 trouble code as soon as possible.

What repairs can fix the P1103 code?

Repairing a P1103 trouble code requires a mechanic to do the following:

  • Replace any faulty or damaged wiring, connectors, or components within the MAF sensor wiring harness. In addition to repairing and replacing items, the mechanic should check for any loose wiring and connectors.
  • If the air filter is dirty upon inspection, the mechanic should replace it with a new one.
  • In addition, before reinstalling the air filter, the mechanic should remove and clean the MAF sensor with a CRC 05110 spray cleaner. The mechanic should be careful when removing the sensor so as not to damage the connecting wiring, which is delicate.
  • They should then repair any air leaks in the vacuum system.
  • Next, they should replace the MAF sensor if further testing determines it is bad.
  • If the PCM tests as bad, the mechanic should replace that component as well. Replacing the PCM requires the mechanic to program it upon installation.

Need help with a P1103 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
P1103
OBD-II

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P1103 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,936

Rating Summary
3,597
169
44
25
101
3,597
169
44
25
101

Jamahl

17 years of experience
703 reviews
Jamahl
17 years of experience
I was a service director for a large ford dealership for 32 years. Since retiring and moving to central Florida I’ve had a lot of bad experience getting my vehicles service.I don’t know how the local Chrysler dealership stays in business.the service I got from Jamal was great.I am so glad I called Your mechanic service
2002 JEEP LIBERTY - CHECK ENGINE LIGHT IS ON - LOUGHMAN, FLORIDA

Clifton

27 years of experience
189 reviews
Clifton
27 years of experience
Clifton was able to find a problem that many others had missed. Pure Genius!
2002 AUDI A4 QUATTRO - CHECK ENGINE LIGHT IS ON - BOCA RATON, FLORIDA

Daniel

18 years of experience
167 reviews
Daniel
18 years of experience
Daniel was very professional. Basically cleaned up the mess that the previous mechanic left
2008 TOYOTA CAMRY - CHECK ENGINE LIGHT IS ON - LEAGUE CITY, TEXAS

Christopher

22 years of experience
79 reviews
Christopher
22 years of experience
Great guy easy to talk to and figure out the issue. I already am making a list of other things I need done. Will be using again soon.
2002 DODGE RAM 1500 - CHECK ENGINE LIGHT IS ON - HAMMOND, LOUISIANA

More related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P0291OBD-II Trouble Code: Cylinder 11 Injector Circuit Low
P0291 code definition When your vehicle’s PCM registers the P0291 code, it means that a voltage reading came from the fuel injector circuit – for cylinder number 11’s fuel injector –...

Related questions

Q: P0089 code, fuel pressure regulator performance low. Went into limp mode, then next morning no start

After doing a little research on your particular situation, it looks as though this is a fairly common problem with this model of vehicle. I would suggest contacting your local dealership about the situation due to the fact that I...

Q: Failed smog test. OBD-II monitors not ready. Needs to be reset

Hello. If your monitors are showing not ready, then that is because the computer was recently reset or the battery may have been replaced. If either of these occurred, then there is a specific amount of driving that needs to...

Q: The AWD disable light is on in my 2006 Buick Rendezvous

Some systems require more than a code reader to find a fault. The AWD disable light means that there is a fault with that system. The AWD system controls torque (rotational force) to the four wheels. This is to improve...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com