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VW Crafter 2010 TD 2.0: Check Engine and Glow Plug Light Flashing with 4875-ROD Error Code

pawcio013 22752 16
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  • #1 16775106
    pawcio013
    Level 12  
    Hello. Patient Crafter 2010 TD 2.0. The check engine light is on and the glow plug light is flashing, no power. After connecting the vcds it showed only the 4875-ROD - Unknown Error Code, the code shows that it is an additional water pump for the exhaust gas cooler. Replacing the pump did not help the problem returns, I mention that the pump turns on so the cables are ok. Anyone know where to look for the problem? Thanks in advance for your help. pzdr
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  • #2 16953837
    SkyNet1989
    Level 11  
    pawcio013 and what you managed to fix the malfunction. I have the same and unfortunately the exchange for a new one did not help anything
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  • #3 17211059
    motocross42
    Level 2  
    Damn, I have exactly the same ... Error 4875 agr cooling emergency mode .. but the pump goes what is it?
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  • #4 17214099
    SkyNet1989
    Level 11  
    so for me the situation looks as follows I replaced the pump and it was still a mistake, the customer went on a new 2 weeks and the head gasket crashed. After the exchange everything stopped, on the new pump works, and I do not know if it has any relationship
  • #5 17221115
    motocross42
    Level 2  
    Thank you ... but I don't think it helps me with anything.
  • #6 17752164
    nowawieś1988
    Level 1  
    Colleagues, what did you do to get everything back to normal ...
    I have the same problem and I need a car very urgently ....
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  • #7 19437216
    maydayxxx
    Level 10  
    has anyone solved this problem?
  • #8 19621404
    WojciechKaminski
    Level 1  
    For me, in Vw T5 the same error plus a decrease in power, did you get it somehow at home?
  • #9 19785197
    Rykielhome
    Level 3  
    Hello, I renew the topic of the crafter and the error 4875 coolant b pump. I have been struggling with the problem for 2 weeks and I put my hands on 3 new pumps in stock and all the time the same error. You do not even need to start the car after turning the ignition, the glow plug light is blinking immediately, the car in emergency mode is missing. Someone is able to talk about it on priv.
  • #10 19785320
    damdam

    Level 34  
    by software, you can disable the diagnostics of the above-mentioned pump, and the associated limited performance mode.
    Company Account:
    ACME Damian Michalski
    Boczna 3a, Żory, 44-240 | Tel.: +48XXXXXXXXX (Show)
  • #11 19787922
    CAR pass
    Level 20  
    Check the cable, as I remember correctly, blue, about 15-20 cm from the pump plug. If it works intermittently, look for the reason there.
  • #12 19788099
    Rykielhome
    Level 3  
    On the middle wire of the plug there is a plus voltage over 12v on the wire on the left side of the plug also over 12v and the right side of the signal wire to can 3.4v installation from the tape over 40 cm and now I'm thinking about buying an org pump audi because I had bought 2 times replacement pomke for 200 zlotys and I think if it does not throw an error.
  • #13 19788150
    CAR pass
    Level 20  
    Send VIN priv, I will check in my free time if what you write and checked is ok. Give me only the colors of the wires for the pump
  • #14 19788627
    beryas
    Level 31  
    Gentlemen, I worked on the topic, two new Hepu pumps did not work, the price was around 300, the original for almost 700 solved the problem. Along with this error and blinking spring I had a power limitation.

    Added after 2 [minutes]:

    aprops, on the replacement pump, the pump worked longer after the car was turned off, after replacing it with the original pump, it turns off almost immediately after turning off the engine.
  • #15 19798576
    Rykielhome
    Level 3  
    Exactly as the colleague wrote above, the purchase of the original pump solved the problem, replacing 2 pieces into the trash can
    Thank you for your interest.

    Maybe someone has a cooling diagram for this crafter
  • #16 20062058
    Adepciak
    Level 1  
    Hey, I have the same problem. The pump works but has two pins? Ocb
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Topic summary

✨ The discussion revolves around a 2010 VW Crafter TD 2.0 experiencing a check engine light and a flashing glow plug light, accompanied by a loss of power. The error code 4875-ROD indicates an issue with the additional water pump for the exhaust gas cooler. Users report that replacing the pump did not resolve the issue, with some experiencing further complications such as head gasket failure. Suggestions include checking wiring, particularly a blue cable near the pump, and considering the purchase of an original pump, as aftermarket replacements have proven ineffective. Several users confirm that using an original pump resolved their issues, while others continue to seek solutions.

FAQ

TL;DR: On 2010 VW Crafter 2.0 TDI, code 4875 often flags the EGR-cooler auxiliary pump; in one case, 3 aftermarket pumps failed and “the original pump solved the problem.” [Elektroda, beryas, post #19788627] Why it matters: This FAQ helps owners and techs fix limp mode with flashing glow-plug and CEL tied to error 4875 on Crafter/Transporter.

Quick Facts

What does error 4875 mean on a VW Crafter 2.0 TDI?

Owners report 4875 as the auxiliary coolant pump for the EGR cooler (“coolant pump B”). When it faults, the ECU triggers a check-engine light, flashing glow-plug lamp, and limp mode. This aligns with VCDS showing 4875-ROD and descriptions like “additional water pump for the exhaust gas cooler.” The pump may still spin, yet the control or verification logic flags a fault. Replacement with a proven OEM unit has cleared the code for several users. [Elektroda, pawcio013, post #16775106]

Why didn’t my new aftermarket pump clear 4875?

Multiple reports say new aftermarket pumps did not satisfy diagnostics, while an OEM pump did. One user tried two Hepu pumps without success; switching to the original part fixed the fault and restored power. Another reported three new pumps tried before resolving it with OEM. As one tech put it, “the original … solved the problem.” This suggests the ECU’s plausibility checks can reject some aftermarket units. [Elektroda, beryas, post #19788627]

Can wiring cause the 4875 code even if the pump spins?

Yes. A known weak spot is a blue wire about 15–20 cm from the pump connector. An intermittent break there can trigger the fault despite pump operation. Inspect, tug-test, and repair any damaged conductors or insulation. Clear codes and confirm stable operation after repair. This simple harness fix has helped users where parts swaps failed. [Elektroda, CAR pass, post #19787922]

How do I test the pump connector signals safely?

With ignition on, users measured +12 V on two pins and about 3.4 V on the signal/CAN pin. Verify battery voltage supply, ground integrity, and the signal line. Use a quality multimeter and back-probe; avoid piercing insulation when possible. If values deviate, diagnose the harness before replacing components. Document readings to compare after repairs. [Elektroda, Rykielhome, post #19788099]

Is limp mode normal with this fault?

Yes. The flashing glow-plug light and limp mode can appear immediately after key-on, even before starting. Users reported loss of power persisting until the underlying issue was fixed. Once the OEM pump was installed or wiring corrected, the warning cleared and full performance returned. This behavior matches protective cooling logic. [Elektroda, Rykielhome, post #19785197]

What’s the fastest practical fix for 4875 on a Crafter?

Start by inspecting and repairing the short harness section near the pump. If wiring checks out, install an OEM auxiliary pump rather than an aftermarket unit. Users consistently report the OEM pump clears the code and restores power, while cheaper replacements often fail diagnostics. “Original pump solved the problem,” summarized one owner. [Elektroda, Rykielhome, post #19798576]

Do aftermarket pumps really fail more here?

In-thread data points say yes. One case: two Hepu pumps failed diagnostics; OEM fixed it. Another: three aftermarket pumps did not resolve the code. That is a 0% success rate across five aftermarket attempts in those reports. While limited, it’s a clear signal for this platform’s control strategy. [Elektroda, beryas, post #19788627]

Could a head-gasket issue be related to 4875?

One user noted the error persisted after pump replacement, then disappeared following a head-gasket replacement. They were unsure if it was related. Treat this as an edge case. Rule out wiring and pump first; consider broader cooling-system faults only if primary fixes fail. [Elektroda, SkyNet1989, post #17214099]

What is the ‘CAN’ wire mentioned at the pump?

In this thread, the ‘CAN’ reference is the pump’s signal line observed at about 3.4 V with ignition on. That reading indicated a live control/signal circuit. If the CAN/signal line is open or shorted, the ECU may log 4875 and enter limp mode. Validate continuity and repair as needed. [Elektroda, Rykielhome, post #19788099]

Does pump run-on after shutdown indicate anything?

One user observed the aftermarket pump ran noticeably longer after key-off than the OEM unit. After installing the original pump, run-on time shortened, and the fault cleared. Excessive run-on can hint at control mismatch or internal pump electronics differences that fail plausibility checks. [Elektroda, beryas, post #19788627]

Is there a software workaround to bypass limp mode?

A contributor stated you can disable diagnostics for this pump in software, removing the associated power limitation. This is a non-OEM modification and carries risk for engine and emissions durability. Prioritize proper repair before considering software changes. [Elektroda, damdam, post #19785320]

How can I fix 4875 step-by-step?

  1. Scan with VCDS, confirm 4875 and record freeze-frame data. 2. Inspect harness; especially the blue wire ~15–20 cm from the connector; repair as needed. 3. If wiring is sound, fit an OEM auxiliary EGR-cooler pump, clear codes, and road-test. [Elektroda, CAR pass, post #19787922]

Does this issue affect other VAG vans like the VW T5?

Yes, a T5 owner reported the same error with reduced power and asked about a home fix. The diagnostic path remains similar: verify wiring, then install a known-good OEM pump. Expect the same warning lights and limp behavior until resolved. [Elektroda, WojciechKaminski, post #19621404]

Why does 4875 appear even without starting the engine?

Users saw the glow-plug light flash and limp mode right after switching the ignition on. The ECU checks the auxiliary pump circuit at key-on. If plausibility fails, it sets the fault immediately, regardless of engine running state. Fixing wiring or fitting OEM cleared this behavior. [Elektroda, Rykielhome, post #19785197]

Where can I get a cooling system diagram for the Crafter?

One owner asked for the diagram after resolving the fault. The thread doesn’t include a schematic. Your best path is OEM service literature or dealer EPC for hose routing and pump position relative to the EGR cooler. [Elektroda, Rykielhome, post #19798576]
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