Which Mercedes Models Get P06DA00 : and Why
P06DA00 is specific to engines that use a variable-displacement oil pump controlled by the Y130 solenoid valve. Not all Mercedes engines use this system, it is found on the M274 (2.0T) and M264 (2.0T EQ Boost) families, both of which use an electrically-regulated pump to reduce parasitic load and improve fuel economy.
W205 C-Class : C200, C220d, C300 (2014–2021)
The W205 C-Class with the M274 engine is the most common vehicle presenting P06DA00 in the workshop. The fault typically appears between 80,000 and 130,000 km. The oil pan wiring harness on these vehicles is particularly prone to insulation cracking due to heat cycling. On the W205, the Y130 connector is accessible from below after oil pan removal, expect 3–4 hours total labor. The XENTRY control unit variant on affected vehicles is typically MED41_R17B.
Key observation from workshop experience: on the W205, voltage at the Y130 connector is frequently within spec even when the fault is active. This means the solenoid coil has failed internally, not the wiring. Always perform the XENTRY actuation test first before condemning the harness.
W213 E-Class : E200, E220d, E300 (2016 onward)
On the W213 with M264 engine (EQ Boost hybrid system), P06DA00 behaves slightly differently. Because the M264 also manages the belt-driven starter-generator, the ME unit is more sensitive to voltage fluctuations. A weak 12V auxiliary battery can cause a false P06DA00 before the valve itself fails. Always test the auxiliary battery first on W213, it is a 5-minute check that can save hours of oil pan removal.
If the battery tests good and the fault persists, the diagnostic path is identical to the W205: XENTRY guided test → actuation check → harness inspection → Y130 replacement.
GLC-Class (X253) : GLC200, GLC300 (2015 onward)
The GLC (X253) with M274 presents P06DA00 at similar mileage to the W205. The additional complication on the GLC is ground clearance, oil pan access is more restricted. In our workshop case, we found that GLC vehicles often show the fault alongside camshaft position deviations, because irregular oil pressure affects cam phaser response. If you see P06DA00 alongside camshaft timing faults on a GLC, the Y130 valve is the root cause of both, fix the valve first before investigating the cam system.
GLA (X156) · A-Class (W176/W177) · CLA (C117)
These models with the M270 or M274 engine see P06DA00 less frequently than the C-Class or GLC, but it does occur. The GLA (X156) typically shows the solenoid failure pattern more than the wiring harness pattern. The M270 uses a similar oil pump control system. On these vehicles, the wiring harness routing inside the oil pan is shorter, which means insulation damage is slightly less common, the Y130 solenoid failure is a more likely cause than the harness on these platforms.
What P06DA00 Actually Means : The Technical Detail
The Y130 valve is a solenoid-operated hydraulic valve integrated into the oil pump assembly inside the oil pan. The Motor Electronics (ME) unit sends a pulse-width modulated (PWM) signal to the valve, varying oil pressure between a low-load economy mode and a high-load full-pressure mode. The ECU monitors the circuit continuously.
When the ME unit detects an open circuit, meaning the expected current draw through the solenoid coil is absent or out of range, it stores P06DA00 and illuminates the check engine light. The engine does not typically enter limp mode, but oil pressure regulation is lost: the pump defaults to maximum mechanical pressure, which is less efficient but not immediately dangerous.
XENTRY Scan Data : From a Real Workshop Case
The data below comes from a real XENTRY quick test performed on a Mercedes-Benz C300 (W205), M274 engine, MED41 control unit variant. This is exactly what you will see on the scan tool when P06DA00 is present.
Text: The actuation of the valve of the oil pump in the combustion engine has an electrical fault or open circuit.
Freeze Frame Data at First Occurrence:
Self-adjustment partial-load, right bank: 0.97–
Number of combustion misfires: 0.00
Intake camshaft position (specified): 35.00 Grad KW
Exhaust camshaft position (specified): −33.00 Grad KW
Vehicle speed: 0.00
Fuel tank fill level: 85.49% → 24.31% (last occurrence)
The freeze frame shows the fault was first stored when the tank was at 85%, meaning it appeared during normal driving, not during a cold start. This is consistent with solenoid coil failure on the M274 rather than a wiring intermittent (which would more often appear at cold start).
XENTRY Guided Test: Y130 Actuation : Specified Values
After the quick test, XENTRY leads you to the guided test for Y130. The test procedure is straightforward but the specified voltage values are critical, many technicians fail this fault by not knowing what to look for:
Expected: Component hums audibly during actuation
Specified voltage values:
OPEN (90% duty cycle): 1.00V … 2.00V
CLOSED (10% duty cycle): 0.10V … 0.18V
Result in this case: Actuation NOT OK, no audible hum, voltage out of range
XENTRY conclusion:
→ Check electrical lines for power supply of Y130 per wiring diagram
→ Replace component Y130 (Engine oil pump valve)
In our case, voltage supply to the connector was confirmed within specification. This ruled out the ECU and power feed, pointing directly to internal solenoid failure in the Y130 valve itself.
Real Workshop Case Study: P06DA00 on Mercedes C300 (W205), M274 Engine
Step 1 : Full System Quick Test
A complete XENTRY quick test confirmed P06DA00 stored as active (A+S) in the N3/10 Motor Electronics control unit. No other related faults were present. The control unit variant was confirmed as MED41_R17B, which is standard for the W205 M274 with software version 18/15 000.
Step 2 : Voltage Check at Y130 Connector
Before removing the oil pan, we verified voltage supply at the Y130 connector. Supply voltage was within specification, which ruled out the ECU driver circuit and the external wiring from ME to the oil pan connector. This narrowed the fault to either the internal wiring harness inside the oil pan or the Y130 valve solenoid coil itself.
Step 3 : Oil Pan Removal
Oil pan removal on the M274 W205 is necessary to access the Y130 valve and its dedicated internal harness. The harness runs from the external connector on the pan wall through to the valve seated in the pump body.
Step 4 : Root Cause Found
With the oil pan removed, inspection of the internal wiring harness (part number A 274 150 86 02) revealed insulation deterioration where the harness passes the pump body. The insulation had become brittle and cracked, a known failure pattern on M274 engines with over 100,000 km. While the external wiring showed normal continuity, the internal section had developed micro-fractures causing the open circuit that XENTRY detected.
Parts Replaced
| Component | Part Number | Notes |
|---|---|---|
| Y130 Engine Oil Pump Control Valve | A 278 180 04 | Genuine Mercedes-Benz. Always replace when harness is replaced, do not reuse old valve. |
| Internal Electrical Wiring Harness (Y130) | A 274 150 86 02 | Specific to M274 engine. Routes inside oil pan. Replace as a set with the valve. |
| Oil pan gasket | Standard M274 gasket | Always replace, pan must be resealed after removal. |
Step 5 : Post-Repair Procedure
- 1Reinstall oil pan with new gasket and torque bolts to specification. Refill with correct engine oil grade (check MB Approval sheet for M274).
- 2Clear all fault codes via XENTRY. Do not just clear with a generic OBD tool, use XENTRY to ensure the ME unit readiness is fully reset.
- 3Perform Y130 actuation test again via XENTRY guided test. Confirm audible hum and voltage values within spec (OPEN: 1.00–2.00V, CLOSED: 0.10–0.18V).
- 4Check for ME software update. On 2018+ M274 vehicles (software version 17/17 000 or earlier), a software update is available that refines the Y130 monitoring strategy and reduces false fault storage. Apply if indicated in XENTRY.
- 5Test drive: minimum 20 minutes including motorway speed. Monitor oil pressure live data in XENTRY during drive. Confirm P06DA00 does not return.
Result: Fault did not return. Oil pressure actuation confirmed stable across all load ranges. Vehicle returned to owner with 0 active faults and ME software updated to 18/15 000.
Diagnostic Decision Guide : What to Check First
P06DA00 can have three root causes. The table below helps you identify which applies before removing the oil pan unnecessarily.
| Check | Tool | Result | Next Step |
|---|---|---|---|
| Auxiliary 12V battery (W213 only) | Battery tester | Below 12.4V or weak CCA | Replace battery first, clear fault, retest |
| Voltage at Y130 external connector | Multimeter | Not within spec | Trace wiring from ME unit to pan connector, external harness issue |
| XENTRY Y130 actuation test | XENTRY | No hum, voltage out of range, supply confirmed OK | Remove oil pan, inspect internal harness, replace Y130 valve and harness A 274 150 86 02 |
| Internal harness visual (pan removed) | Visual inspection | Insulation cracked, brittle, or oil-soaked | Replace harness A 274 150 86 02 AND valve A 278 180 04 |
| Y130 coil resistance | Multimeter (pins at valve) | Open circuit (∞ Ω) or very high resistance | Y130 solenoid coil has failed internally, replace valve |
3 Mistakes Workshops Make With P06DA00
- Replacing only the Y130 valve without inspecting the internal harness. If the harness insulation is degraded, a new valve will fail again within months. Always inspect and replace the harness (A 274 150 86 02) when the pan is already off.
- Skipping the XENTRY actuation test and going straight to oil pan removal. On W213 models, a weak 12V auxiliary battery can store P06DA00 without any valve or wiring failure. A 5-minute battery test can save 3 hours of unnecessary labour.
- Using aftermarket Y130 valves. The Y130 is a precision solenoid valve. Aftermarket alternatives consistently show higher recurrence rates in our workshop experience. Always use genuine Mercedes-Benz part A 278 180 04, the cost difference is not worth the comeback repair.
Frequently Asked Questions : P06DA00 Mercedes
— Salim, Mercedes Expert
Independent specialist in Mercedes-Benz diagnostics, CAN Bus analysis, troubleshooting case studies, and EV systems.