Q: My check engine light came on and it had code p1151. What could cause that code?

asked by on

My check engine light came on and it had code p1151. What could cause that code?

My car has 200000 miles.
My car has an automatic transmission.

Trouble code P1151 sets if the air/fuel ratio is out of range lean. Vacuum leaks in the intake are a typical cause but if the fault is not found there, there are actually quite a few potential trouble spots including: the oxygen sensor itself is faulty (the O2 sensor can be readily tested), fuel pressure is out of range, the MAF sensor is dirty/defective, there is a leaking fuel injector or fuel pressure regulator, and/or the Powertrain Control Module (PCM) is defective (rare, though). To resolve this, the recommended service is a check engine light diagnostic. I would start with that basic check engine light diagnostic and the mechanic will advise you from there, based on his or her findings. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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. My check engine light came on and it had code p1151. What could cause that code?

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: Car will not start after alternator replacement?

The backfire sound usually indicates a misfire of some kind which may be related to a timing issue such as a faulty ignition coil, bad spark plug wires or a faulty crankshaft position sensor. This may also possibly be related...

Q: Rough Starts & Idle

The fuel pump code for the secondary fuel circuit fault may be the fuel pump module on the cross member under the truck. The module can go bad and cause no fuel pump operation intermittently. The engine vacuum line from...

Q: Cheapest way to reinstall new airbags , driver and passenger ?

First of all, I hope that everyone was safe in the accident. Generally, you should not attempt to install an airbag until the complete system is checked. This is done using special airbag simulators and by checking for codes to...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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...