How many oxygen sensors does a 2008 Honda Pilot have?
Oxygen sensors are located before and after the catalytic converter. A vehicle may have two to five oxygen sensors, and sometimes even more.
What should I do if my Honda sensor says p0134?
If the sensor circuit is OK, and the DTC (s) come back after clearing them and doing a short test-drive, replace the A/F sensor. The replacement A/F sensors in Honda parts stock are an improved version over the original sensor. The cost to diagnose the P0134 HONDA code is 1.0 hour of labor.
What causes the p2251 OBD-II trouble code?
The engine control module (ECM) monitors the negative current control of the O2 sensor heater circuit. If the current cannot be controlled and the voltage does not change on the return wire, then the ECM detects this as an open circuit in the heater circuit for the O2 sensor heater circuit. What causes the P2251 code?
What to do if p2251 O2 sensor is reset?
Unplug the HO2S in question and use the DVOM to check resistance between the negative current control circuit and any voltage circuits. If there is continuity, suspect a defective HO2S. If the code P2251 continues to be reset, start the engine. Allow it to reach normal operating temperature and idle (with the transmission in neutral or park).
What does a stored code p2251 in PCM mean?
A stored code P2251 means that the powertrain control module (PCM) has detected a negative current discrepancy in the upstream oxygen (O2) sensor for engine bank number one. Bank one is the engine bank that contains the number one cylinder. Sensor 1 denotes the upstream (pre-cat) sensor. The negative current control circuit is a ground circuit.
If the sensor circuit is OK, and the DTC (s) come back after clearing them and doing a short test-drive, replace the A/F sensor. The replacement A/F sensors in Honda parts stock are an improved version over the original sensor. The cost to diagnose the P0134 HONDA code is 1.0 hour of labor.
What causes a p2251 O2 sensor to malfunction?
Causes for this code may include: 1 Defective oxygen sensor/s. 2 Burnt, chafed, broken, or disconnected wiring and/or connectors. 3 Faulty PCM or PCM programming error.
How to diagnose a car code p2251?
A diagnostic scanner, a digital volt/ohmmeter (DVOM), and a source of reliable vehicle information will be needed in order to accurately diagnose a code P2251. Connect the scanner to the vehicle diagnostic port and retrieve all stored codes and pertinent freeze frame data.
What’s the OBD code for a Honda Pilot?
“Please verify these Generic OBD II Code descriptions and testing procedures with an appropriate manual. We do frequently update this Generic Check Engine Light Codes list, but technology is constantly in motion.