Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is noticing a problem with the part that helps clean the car's exhaust. It's like when a toy's battery is too strong and causes it to act funny.
The P208D code indicates that the reductant pump A control circuit is experiencing higher than expected voltage.
The reductant pump is part of the diesel exhaust fluid (DEF) system, which reduces emissions in diesel engines. The control circuit for this pump is monitored by the engine control module (ECM). If the voltage in the circuit is higher than expected, the ECM triggers this code.
• Check Engine Light is on
• Possible reduction in engine performance
• Increased emissions
• Faulty reductant pump
• Wiring issues such as short circuits or open circuits
• Faulty ECM
Reductant: A substance used to reduce emissions in diesel engines.
DEF: Diesel Exhaust Fluid, a liquid used to reduce emissions in diesel engines.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the reductant pump for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the reductant pump if faulty.
• Replace or reprogram the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $800
Moderate
• Ford F-Series
• Chevrolet Silverado
• Ram 2500
• Regularly inspect wiring for damage.
• Ensure diesel exhaust fluid is topped up.
• Perform regular maintenance checks.
Sensor Issue
• Do not ignore the check engine light.
• Have the vehicle inspected by a professional if unsure.
• Regularly maintain the DEF system.
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
This code has become more common with the increased use of DEF systems in diesel engines to meet emissions standards.
Moderate – Addressing this code is important to maintain emissions compliance and engine performance.
Ignoring emissions-related codes can lead to failing emissions tests and fines in some regions.
• Engine running
• DEF system active
The reductant pump is typically located near the DEF tank, often under the vehicle.
Q: Can I drive with a P208D code?
A: It's possible to drive short distances, but it's best to address the issue soon to avoid increased emissions and potential engine performance issues.
Q: What happens if I ignore the P208D code?
A: Ignoring this code can lead to increased emissions, potential engine damage, and failing emissions tests.
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