P0008 Code: Bank 1 Timing Causes and How to Fix It
P0008 indicates a Bank 1 engine timing mismatch. Learn the likely causes, when to stop driving, and how to confirm the fault before replacing timing components or sensors.
Oct 10, 2026
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International Harvester 9900i Camshaft Position Sensor
2 itemsHard starts, stalling, or P0340 codes can signal a bad camshaft position sensor. Restore accurate timing signals for smoother starts, better drivability, and dependable engine response.
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Walker ProductsPart # 1008-1014
Walker Products 1008-1014 Engine Camshaft Position Sensor
53 Reviews
$65.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2003-2003 Freightliner FLD132, 2003-2003 International 9100i SBA, 2003-2003 International 9200i SBA, 2003-2003 International 9400i SBA, 2003-2003 International 9900i SFA, 2003-2003 Kenworth C500, 2003-2003 Kenworth T2000, 2003-2003 Kenworth T600A, 2003-2003 Kenworth T800, 2003-2003 Kenworth W900, 2003-2003 Oshkosh Motor Truck Co. H, 2003-2003 Oshkosh Motor Truck Co. P, 2003-2003 Peterbilt 357, 2003-2003 Peterbilt 362, 2003-2003 Peterbilt 378, 2003-2003 Peterbilt 379, 2003-2003 Peterbilt 385, 2003-2003 Pierce Mfg. Inc. Enclosed Cab, 2003-2003 Sterling Truck A9500, 2003-2003 Sterling Truck AT9500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: International Harvester 9900i
Item LocatedUnited States
Quantity1
Part interchange
1008-1014, 904-7251, 08929388, A9042031202
item #1001K977
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Walker ProductsPart # 1008-1017
Walker Products 1008-1017 Engine Camshaft Position Sensor
53 Reviews
$39.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2011-2011 Freightliner Coronado, 2011-2011 Freightliner FLD132, 2011-2011 Kenworth T660, 2011-2011 Kenworth T700, 2011-2011 Kenworth T800, 2011-2011 Kenworth W900, 2011-2011 Oshkosh Motor Truck Co. H, 2011-2011 Oshkosh Motor Truck Co. S, 2011-2011 Peterbilt 320, 2011-2011 Peterbilt 365, 2011-2011 Peterbilt 367, 2011-2011 Peterbilt 384, 2011-2011 Peterbilt 386, 2011-2011 Peterbilt 387, 2011-2011 Peterbilt 388, 2011-2011 Peterbilt 389, 2011-2011 Peterbilt 587, 2011-2011 Spartan Motors Gladiator, 2011-2011 Spartan Motors K2, 2011-2011 Volvo VNL
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: International Harvester 9900i
Item LocatedUnited States
Quantity1
Part interchange
1008-1017, 4921599, 5491994, 904-7132
item #1001KGAC
Show less
The camshaft position sensor (CMP sensor) plays a key role in a modern internal combustion engine. It monitors the position and speed of the camshaft, which controls the opening and closing of the engine's intake and exhaust valves.
Location: The camshaft position sensor is typically located near the camshaft in the engine's cylinder head or valve cover. Its exact location may vary depending on the vehicle's make and model.
Function: The CMP sensor's primary function is to monitor the position and speed of the camshaft. It sends this information to the engine control unit (ECU) or engine control module (ECM). The ECU uses this data to determine the optimal timing for fuel injection and ignition, ensuring efficient engine operation.
Types of CMP Sensors
Hall Effect Sensor: Many CMP sensors use the Hall effect principle, which generates a voltage signal based on the camshaft's position.
Magnetic Pickup Sensor: Some vehicles use a magnetic pickup sensor that generates a voltage signal as the camshaft's lobes pass by it.
Symptoms of a bad camshaft position sensor
A failing or faulty camshaft position sensor (CMP sensor) can lead to various symptoms and issues in your vehicle's engine performance. Recognizing these symptoms can help diagnose and address the problem in a timely manner. Check the following:
- Check engine light: Illuminates on the dashboard due to sensor malfunction.
- Poor engine performance: Results in rough idling, stalling, and power loss.
- Misfires: Causes engine misfires, vibrations, and reduced power.
- Starting issues: Leads to hard starting or no start conditions.
- Fuel efficiency: Decreases fuel efficiency and increased consumption.
- Timing problems: Disrupts engine timing, causing erratic operation.
- Loss of OBD-II data: Affects diagnostic data and troubleshooting.
- Emissions increase: Raises emissions levels and compliance concerns.
- Transmission impact: This may affect automatic transmission shifting.
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