P003E
A Camshaft Profile Control Performance/Stuck Off Bank 2P003E is a generic OBD-II powertrain diagnostic trouble code: A Camshaft Profile Control Performance/Stuck Off Bank 2. It is logged by the engine control unit when the ckp/cmp monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.
What P003E means
DTC P003E indicates that the turbocharger or supercharger bypass valve position sensor is producing an intermittent or erratic signal that does not follow a consistent pattern during engine operation. Unlike P003C and P003D, which flag sustained low or high voltage, P003E is triggered when the PCM detects a signal that drops out, spikes, or fluctuates unpredictably — often within an otherwise acceptable voltage window. Intermittent faults are among the hardest to diagnose because they may not be present at the time of inspection, yet they can cause unpredictable boost behaviour including momentary surges, cuts, or hesitation. Root causes typically involve poor electrical connections, heat-damaged wire insulation that causes intermittent contact, vibration-induced connector fretting, or a sensor whose internal wiper or element is wearing out. The fault is often accompanied by multiple intermittent entries in the PCM's fault history, and freeze-frame data rarely captures the moment of failure reliably. A thorough wiring and connector inspection under operating temperature is essential.
Common causes
Most-frequently reported root causes when P003E is logged.
-
1
Intermittent open or high-resistance connection at the bypass valve position sensor connector due to corrosion or terminal fretting
-
2
Chafed wiring harness making intermittent contact with engine components or chassis ground
-
3
Failing bypass valve position sensor with a worn internal resistance element producing an unstable output
-
4
Vibration-induced connector looseness allowing the sensor signal to momentarily drop or spike
-
5
Heat-degraded wire insulation that breaks down intermittently as the engine reaches operating temperature
-
6
Moisture ingress into the connector that evaporates during warm-up, making the fault disappear when the vehicle is inspected
-
7
Shared ground circuit with poor connection causing voltage spikes on multiple sensors
Symptoms drivers notice
How to diagnose P003E
A typical diagnostic flow when this code is present.
-
1
Connect a scan tool capable of recording live data and capture a long data log during a road test, focusing on the position sensor voltage trace for dropouts or spikes
-
2
Perform a thorough wiggle test on the sensor connector and harness while monitoring live sensor data; any signal disturbance during wiggling localises the fault to that section
-
3
Inspect the sensor connector under strong light for signs of fretting corrosion (fine copper oxide dust in the connector cavity) and clean or replace the connector as needed
-
4
Check wiring harness routing for contact with exhaust components, sharp edges, or vibrating parts; secure or reroute as necessary
-
5
Measure sensor ground circuit resistance with the harness fully connected and warm; a reading above 0.5 ohms suggests a deteriorating ground connection
-
6
If no fault is found in the harness, replace the position sensor — worn internal elements often only fail under thermal or mechanical stress and cannot be reproduced at ambient temperature
-
7
After repair, drive the vehicle through multiple heat cycles and verify no recurrence in the PCM fault history before closing the job
Related powertrain codes
- P000A — A Camshaft Position Slow Response Bank 1
- P000B — B Camshaft Position Slow Response Bank 1
- P000C — A Camshaft Position Slow Response Bank 2
- P000D — B Camshaft Position Slow Response Bank 2
- P0010 — A Camshaft Position Actuator Circuit (Bank 1)
- P0011 — A Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)
Frequently asked questions
Why does P003E come and go?
Intermittent codes are caused by faults that only manifest under specific conditions — usually heat, vibration, or moisture. The underlying connection or component works correctly at other times, so the code sets inconsistently. This is why a thorough wiggle test and road test data log are more useful than a static bench inspection.
Can I clear P003E and see if it comes back?
Clearing the code and re-evaluating is a valid step, but without fixing the root cause the code will return, often at an inconvenient time. Repeated intermittent faults can cause unexpected limp-mode events while driving, so the underlying cause should still be diagnosed and repaired.
Is P003E less serious than P003C or P003D?
Not necessarily. While an intermittent fault is easier to live with short-term, it typically indicates a component or connection that is in the process of failing completely. Left unaddressed, P003E will usually progress into a sustained circuit-low or circuit-high fault with more significant drivability impact.
What tools are most useful for diagnosing P003E?
A scan tool with live graphing and a data-logging function is essential so you can capture the fault in real time during a road test. A digital storage oscilloscope (DSO) connected to the sensor signal wire provides even more resolution for detecting brief signal dropouts that a standard scan tool may miss between data samples.
Disabling P003E in software
RaceTune can permanently disable P003E — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.
Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.
Got P003E in your scan?
Upload your ECU file — we'll identify the exact software version and confirm whether a disable is available for your car.
Upload your file