P0377 Code - Timing Reference High Resolution Signal 'B' Too Few Pulses

What Does P0377 Mean?

OBD-II Code Decreased engine performance is defined as a Timing Reference High Resolution Signal "B" Too Few Pulses
The engine control module (PCM) sends a duplicate signal of the crankshaft position sensor (CKP) to the Fuel Injection Control Module (FICM). If the signal to the FICM becomes corrupt, the PCM will set code P0377.

engine code P0377	P0377 fix	obd P0377	dtc P0377
obd code P0377	obd2 P0377	P0377 car code	diagnostic code P0377
car code P0377	check engine code P0377	fehlercode P0377	P0377 fiat
codigo P0377	codigo falla P0377	P0377 kody b??dów	codigo de falla P0377

What are the common causes of P0377 ?

• An air leak forward of the DPF will change the sensor readings resulting in the code
• Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
• Fuel with a large percentage of sulfur will clog the DPF quickly

How do you troubleshoot P0377 ?

The most common ways to fix the P0356 code include:

• Changing out the camshaft, crankshaft and distributor sensors
• Replacing, repairing or sometimes just cleaning wiring and electrical connectors
• In rare circumstances, the PCM may need to be replaced

Searches related to P0377 Code - Timing Reference High Resolution Signal 'B' Too Few Pulses

• p0367
• p0378