What does the code p0491 mean on a car engine?
The P0491 code tell there is a fault with the system – usually that the secondary air flow is too low on bank 1. Bank #1 is the side of the engine with cylinder #1. For bank #2, see code P0492.
What causes a secondary air injection pump p0491?
Potential causes for a P0491 may include: A fuse or relay for the secondary air injection pump may be faulty A leak in the hoses/piping between the secondary air injection pump and the Combi or secondary air injection A sensor for the secondary air pressure may be faulty
What to do if your vacuum leak is p0491?
Solutions for P0491 may include: Repairing or replacing any damaged vacuum hoses or fittings which could be causing a vacuum leak Technicians note that this malfunction almost always occurs in times when the weather is cold.
What do the codes 491 and 492 mean?
The codes mean secondary insufficient air flow or something like that. Help! have the same problem? The codes are for the secondary air injection systems and the 491 and 492 are for banks 1 and 2.
The P0491 code tell there is a fault with the system – usually that the secondary air flow is too low on bank 1. Bank #1 is the side of the engine with cylinder #1. For bank #2, see code P0492.
What causes the p0021 OBD-II trouble code?
P0021 is the OBD-II generic code indicating that the Engine Control Module (ECM) has determined that the bank 2 intake camshaft is more advanced than what the ECM has commanded it to be. This over advanced condition could be during advancing, or retarding of the camshaft timing. What causes the P0021 code?
What does code p0021 mean on the ECM?
What Does Code P0021 Mean? The variable valve timing system increases fuel economy and engine performance by regulating when the intake and exhaust valves are opened and closed. The camshaft (s) is (are) adjusted by the ECM through the use of an oil control valve (s) (OCV) also called variable valve timing control solenoid valves.
Potential causes for a P0491 may include: A fuse or relay for the secondary air injection pump may be faulty A leak in the hoses/piping between the secondary air injection pump and the Combi or secondary air injection A sensor for the secondary air pressure may be faulty
What does the OBD code p0491 mean?
P0491 code definition. This is the OBD-II code for Secondary Air Injection System Insufficient Flow Bank 1, indicating a problem on the side of the engine which contains cylinder #1.
P0021 is the OBD-II generic code indicating that the Engine Control Module (ECM) has determined that the bank 2 intake camshaft is more advanced than what the ECM has commanded it to be. This over advanced condition could be during advancing, or retarding of the camshaft timing. What causes the P0021 code?
What Does Code P0021 Mean? The variable valve timing system increases fuel economy and engine performance by regulating when the intake and exhaust valves are opened and closed. The camshaft (s) is (are) adjusted by the ECM through the use of an oil control valve (s) (OCV) also called variable valve timing control solenoid valves.