Q: How to repair the P2238 trouble code in my car

asked by on

I have P2238 error coming up and I need it repaired.

Hi there. This P2238 code is set when the engine computer detects a short circuit on the heater for the 02 or AF sensor.The short is generally in the sensor itself and replacement corrects the condition. However, there could be a short in the wire harness or inside the engine computer.

A digital volt/ohm meter can be used to check the heater resistance of bank 1 sensor 1 02/AF sensor. If it is lower then specified, then replace the sensor. Further inspection may be needed if the wire harness or engine computer are at fault.

YourMechanic has several available technicians that can assist you with a Check Engine Light inspection and O2/AF sensor replacement as necessary. Best of luck.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. How to repair the P2238 trouble code in my car

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have a 2003 Subaru Forester and upon starting this morning it ran fine for a minute or two. Then the Check Engine Light came on.

Too much air flowing into the intake causes the engine to lean out too much air in relation to the fuel and misfire. At an idle, the PCV valve restricts air flow, to reduce this problem. At high manifold vacuum...

Q: Truck wont start gives check engine light ran fine yesterday

Hi there. The Check Engine Light is a warning system that illuminates when an OBD-II error code is triggered. There are literally hundreds of possible reasons why the Check Engine will light up. In most cases, this is caused by...

Q: Still getting error codes

The codes you have for your GMC Yukon, p0171 and p0174, are informing you that the engine is running lean. This means that there is unmetered air entering the engine after the mass airflow sensor and is disturbing the air/fuel...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...