Standardized generic DTCFuel, air metering & auxiliary emissions

P0008 — Engine Position System Performance — Bank 1

P0008 is the standardized powertrain DTC for “Engine Position System Performance — Bank 1.” The code identifies the monitored condition; it does not by itself prove which part failed.

Standardized generic definition

Engine Position System Performance — Bank 1

DTC category

Fuel, air metering & auxiliary emissions

Diagnostic priority

Moderate to high. Correlation or timing faults can indicate low oil pressure, VVT control problems, or mechanical timing errors.

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What P0008 means

P0008 is the standardized powertrain DTC for “Engine Position System Performance — Bank 1.” The code identifies the monitored condition; it does not by itself prove which part failed.

Start with the stored data and the simplest external checks before replacing the component named in the code.

Bank/sensor location note

Bank 1 is the cylinder bank containing cylinder No. 1. On an inline engine there is normally only one bank. Do not guess bank location from left/right orientation; verify the engine-specific service information.

Possible symptoms

Check Engine Light
Rattle on startup
Rough idle or loss of power
Hard start
Reduced fuel economy

Causes to test

These are diagnostic possibilities, not a statistical parts-replacement ranking. Vehicle-specific service information takes priority.

Low/dirty/wrong-viscosity engine oil affecting VVT operation
Sticking VVT oil-control valve or actuator/phaser
Cam/crank sensor signal or wiring issue
Timing chain/belt wear, jump, or incorrect mechanical timing
Oil-pressure or oil-passage problem

Step-by-step diagnostic workflow

Check oil level, condition, and correct viscosity first.
Review cam commanded versus actual angle when supported.
Inspect and test VVT solenoids and oil supply passages.
Compare cam and crank signal integrity; inspect connectors and harness.
If correlation remains out of specification, verify mechanical timing before replacing sensors.
Clear codes only after repair, then complete an appropriate drive cycle and verify the code and symptoms do not return.

Preserve evidence: EPA OBD guidance emphasizes that stored DTCs and freeze-frame data are important to proper diagnosis. Save them before clearing codes.

Scan data worth checking

Commanded vs actual cam angle
Cam/crank synchronization or correlation status
Engine oil temperature/pressure data where available
RPM during crank/start

Severity and drivability

Moderate to high. Correlation or timing faults can indicate low oil pressure, VVT control problems, or mechanical timing errors.

Stop driving and investigate immediately if there is a flashing MIL, oil-pressure warning, overheating, fuel leakage, severe misfire, major loss of power, abnormal mechanical noise, or a transmission that is slipping badly.

Common diagnostic mistakes

Replacing cam or crank sensors when the timing chain has stretched
Ignoring low oil level or wrong oil viscosity
Forcing or powering VVT actuators outside approved procedures

Related generic codes

P0009 — Engine Position System Performance — Bank 2P0011 — A Camshaft Position Timing Over-Advanced or System Performance — Bank 1P0012 — A Camshaft Position Timing Over-Retarded — Bank 1P0014 — B Camshaft Position Timing Over-Advanced or System Performance — Bank 1P0015 — B Camshaft Position Timing Over-Retarded — Bank 1P0016 — Crankshaft Position–Camshaft Position Correlation — Bank 1 Sensor A

Source and accuracy notes

Generic DTC structure and standardized definitions are governed by SAE J2012/J2012DA. Actual enable criteria, thresholds, circuit pinouts, test values, software conditions, and repair procedures vary by vehicle. Use current OEM service information for the exact year/engine/calibration and check applicable manufacturer technical service bulletins. See the site methodology and primary-reference policy.