Why is my EGR valve not setting p1491?
The most likely problem is the EGR valve / solenoid. If the P1491 code stays active and the P1498 does not set, we will need to test the sensor’s / solenoid’s associated circuits. At this point it may be wise to seek assistance from a trained automotive diagnostician.
What does DTC p0401 or p1491 mean?
If DTC P0401 or P1491 is stored, or if the engine hesitate or surges, clean the EGR port, install an EGR pipe kit, and clear the code. User Submitted Video What does this mean? Cost of diagnosing the P1491 HONDA code Labor: 1.0 The cost of diagnosing the P1491 HONDA code is 1.0 hour of labor.
What to do if your fault code is p1491?
If the P1491 is the only active fault code present, and there are no updates/TSBs for your particular vehicle, then the next step is to locate the EGR Valve / Lift sensor / position sensor. You can usually find the EGR valve mounted between the intake and exhaust manifold of the engine. Once located, visually inspect the connectors and wiring.
What does Mil code p1491 mean on Honda Odyssey?
In some 1999–2003 Honda Odysseys and 2003 Honda Pilots, the EGR system may become contaminated or clogged. If this happens, the vehicle may hesitate or surge during light acceleration, and the MIL (malfunction indicator lamp)may come on with DTC P0401 (EGR insufficient flow) or P1491 (EGR valve insufficient lift).
What does the p0700 code on a shift solenoid mean?
This code may be seen with shift solenoid codes or other transmission codes. What the P0700 code means. P0700 is set when the PCM detects a malfunction in the transmission control system. This malfunction causes the vehicle to set a Check Engine Light and trigger a failsafe mode.
What does the p1491 Honda engine code mean?
P1491 HONDA Meaning The Exhaust Gas Recirculation (EGR) system reduces Oxides of Nitrogen (NOx). NOx is generated by high combustion temperatures. The EGR system lowers peak combustion temperature by recirculating inactive exhaust gas into the air/fuel mixture, thus reducing NOx emissions.
What is the OBD-II scanner error code p0700?
P0700: Transmission Control System Malfunction. The OBD-II scanner error code P0700 problem is a generic code that applies to vehicles equipped with OBD-II. It refers to the transmission control module (TCM) in the automatic transmission. The P0700 code is informational. The code points to a general fault, not a direct fault.
Why is the Check Engine Light set to p0700?
P0700 is set when the PCM detects a malfunction in the transmission control system. This malfunction causes the vehicle to set a Check Engine Light and trigger a failsafe mode.
What does insufficient EGR flow in Audi mean?
P0401 Insufficient EGR Flow – EGR valve movement detected but not enough change in O2 sensor voltage/ MAP sensor voltage. P1498 EGR Valve Position Sensor Circuit High – voltage on the sensor circuits are high/open circuit. EVAP Canister Purge Regulator Valve 2 Open Circuit – this typically indicates a canister purge valve circuit fault (Audi/VW).
The most likely problem is the EGR valve / solenoid. If the P1491 code stays active and the P1498 does not set, we will need to test the sensor’s / solenoid’s associated circuits. At this point it may be wise to seek assistance from a trained automotive diagnostician.
If the P1491 is the only active fault code present, and there are no updates/TSBs for your particular vehicle, then the next step is to locate the EGR Valve / Lift sensor / position sensor. You can usually find the EGR valve mounted between the intake and exhaust manifold of the engine. Once located, visually inspect the connectors and wiring.
In some 1999–2003 Honda Odysseys and 2003 Honda Pilots, the EGR system may become contaminated or clogged. If this happens, the vehicle may hesitate or surge during light acceleration, and the MIL (malfunction indicator lamp)may come on with DTC P0401 (EGR insufficient flow) or P1491 (EGR valve insufficient lift).
P0401 Insufficient EGR Flow – EGR valve movement detected but not enough change in O2 sensor voltage/ MAP sensor voltage. P1498 EGR Valve Position Sensor Circuit High – voltage on the sensor circuits are high/open circuit. EVAP Canister Purge Regulator Valve 2 Open Circuit – this typically indicates a canister purge valve circuit fault (Audi/VW).